Q536 - Electrical, Electronic, & Control Engineering, USCG prep certification 2026

Progress: 24% (23/94)

Learning progress ?

1. A salinity indicator system such as that used to measure the salt content of potable water systems and boiler feed and condensate systems uses what technology?Not learned 2. When the control handle is in the "off" position, what is the status of the solenoid actuated brake of an electric winch?Not learned 3. In the event of a power failure during cargo loading operations, the movement of an electric powered cargo winch will be stopped by what means?Not learned 4. As part of a routine maintenance program for deck machinery motor controllers, what should be done?Not learned 5. If deck machinery is expected to be idle for an extended period of time, what should be done?Not learned 6. Which of the following conditions will occur if the brake solenoid coil burns out on a cargo winch with an electrical brake?Not learned 7. If a spring-set electric solenoid-released brake on a winch fails to hold a load properly when the solenoid is de-energized, what must be done?Not learned 8. In an impressed current cathodic hull protection system, what statement is true concerning the composition and arrangement of the anodes?Not learned 9. While monitoring an impressed current cathodic hull protection system, which of the following measurements should remain constant in a properly operating electronically regulated system?Not learned 10. In monitoring an impressed current cathodic hull protection system, it is important to ensure that the propeller screw receives the same cathodic protection as the hull. What should be checked?Not learned 11. Before any work on electrical or electronic equipment is performed, which of the following precautions should be carried out?Not learned 12. Which of the following fixed temperature heat-actuated fire detectors can be reused after it has detected a fire?Not learned 13. Which of the following fixed temperature heat-actuated fire detectors is the most prone to false alarms?Not learned 14. An unintended path of low resistance bypassing the intended path and allowing passage of an abnormally high amount of current is known as what?Not learned 15. How may the unit "hertz" be best described?Not learned 16. When placed in a magnetic field, which of the materials listed has the highest permeability?Not learned 17. What is the opposition to the establishment of magnetic lines of force in a magnetic circuit called?Not learned 18. In terms of the type of load in an alternating circuit, in what type of alternating current circuit will the voltage always lead the current?Not learned 19. In a 60 Hz AC system, what is the duration in seconds for one complete cycle?Not learned 20. The multiplier prefix "giga" (G) such as used in "gigabytes" represents what multiplication factor?Not learned 21. AC circuits can possess characteristics of resistance, inductance, and capacitance. In terms of units of measure, how is the capacitive reactance of the circuit expressed?Not learned 22. Before working on an electric cargo winch master switch or controller, what should be done?Not learned 23. At a minimum threshold, how many milliamps of current through the body produces a painful sensation that most people would perceive as an electric shock?Not learned 24. At a minimum threshold, how many milliamps of current through the body produces a condition where most people would be unable to let go of the energized electrical conductor due to involuntary muscular contraction?Not learned 25. At a minimum threshold, how many milliamps of current through the body produces a condition where most people would experience respiratory paralysis and be unable to breathe while still in contact with the energized conductor?Not learned 26. At a minimum threshold, how many milliamps of current through the body produces a condition where most people would suffer ventricular fibrillation and could only be resuscitated with a ventricular defibrillator?Not learned 27. Contact with any energized electrical system conductor is potentially hazardous and precautions should be taken to prevent exposure. With all other factors considered equal (such as voltage, conducting path through the body and the duration of contact), contact with an energized electrical system conductor of which system type would produce the most damaging effect?Not learned 28. Before electrical work can be safely undertaken, the equipment must be de-energized, locked and tagged out, and verification must be made that the circuit is actually dead. What testing device is most certain to reliably verify that a circuit is actually dead?Not learned 29. Which of the following devices would be forbidden to use as a primary means of electrical isolation?Not learned 30. Which of the following voltage testers would be associated with high quality, be safe to use, and minimize the electric shock hazard?Not learned 31. Before work may safely commence on a high voltage system, what must first be done after disconnection and isolation?Not learned 32. In order for a live-line tester to be used to test and prove dead a high voltage circuit, what must be done to verify the ability of the tester to detect a voltage?Not learned 33. What will happen to an electrical coil when the direct current flowing through the coil is increasing?Not learned 34. Which of the substances listed can be used to shield sensitive equipment from static magnetic fields?Not learned 35. Which electrical schematic symbol represents a normally closed thermostatNot learned 36. Which of the electrical schematic symbols shown in the illustration represents a normally closed limit switchNot learned 37. How is electrical conductor insulation classed? Example: insulation class HNot learned 38. When electrical cables penetrate watertight bulkheads, what must be provided for?Not learned 39. Why is copper often used as an electrical conductor?Not learned 40. Why are large cable sizes often formed as individual conductors comprised of several smaller strands?Not learned 41. Electrical wire in general, when used aboard vessels must meet minimum requirements. Which of the following statements is/are correct?Not learned 42. Hysteresis is one cause of electrical power loss associated with electricity generation equipment. What phenomenon results in hysteresis?Not learned 43. How are the line losses in a distribution circuit kept to a minimum?Not learned 44. In a simple DC circuit, the resistance is held constant while the applied voltage is halved. What will be the effect on the current flow as compared to the original current?Not learned 45. What would be the total capacitance of the circuit illustrated in figure "A" if the value of capacitor C1 was 100 microfarads and capacitor C2 was 50 microfaradsNot learned 46. In a series circuit, which value will remain unchanged at all places in the circuit?Not learned 47. In a series circuit, what is the applied voltage (or sum of the applied voltages) equal to?Not learned 48. Which of the electrical properties listed will always be the same across each component in a parallel circuit?Not learned 49. Which of the following statements concerning a circuit with parallel connected resistors is correct?Not learned 50. What statement is true concerning the total resistance of a parallel circuit?Not learned 51. Which of the following statements is true concerning circuits with parallel connected resistances?Not learned 52. In figure "A" of the illustration, 12 volts is applied to the circuit where the resistance of R1 is 10 ohms and R2 is 10 ohms. what is the voltage across R2 when the switch is closedNot learned 53. What is the total effective resistance of figure "B" of the illustrated circuit if the resistance of R is 3 1 ohms, R is 4 ohms, and R is 5 ohmsNot learned 54. If a circuit has resistances of 5, 10, and 20 ohms connected in parallel, what is the combined total resistance of the circuit?Not learned 55. Three 12-volt, lead-acid, batteries connected in series will develop how many volts?Not learned 56. For the purpose of calculating line current, which of the following procedures should be used to determine the total line current of a three-phase, delta wound, AC generator?Not learned 57. Which statement is true concerning the total power consumed in a parallel circuit?Not learned 58. How is the power dissipated as heat in a direct current circuit calculated?Not learned 59. A 125 volt DC motor is rated at 10 kW. What is the current rating of the motor?Not learned 60. Two 100 watt light bulbs rated at 100 volts are connected in parallel across a 100 volt power supply. What will be the total power consumed by the two bulbs?Not learned 61. What is a useful instrument for checking 3-phase AC motor performance by measuring possible unbalanced currents?Not learned 62. An internal resistance is placed in series with the meter movement of which of the following instruments?Not learned 63. How should the shunt used in an ammeter be connected?Not learned 64. Why are external shunts sometimes used with ammeters?Not learned 65. What is an ammeter used to measure?Not learned 66. If a digital multimeter set up to measure AC volts reads slightly above 'zero' when its leads are disconnected, what is this a result of?Not learned 67. When a resistor is used as a shunt and is connected in parallel with a meter movement coil, what capability does this provide?Not learned 68. What is the instrument called a galvanometer used to measure?Not learned 69. Which of the listed statements is correct when using a digital multimeter set up as an ohmmeter?Not learned 70. What is an ohmmeter used to measure?Not learned 71. What practice could potentially damage a multimeter?Not learned 72. The clamp-on AC ammeter consists essentially of a split-core and a rectifier-type instrument connected to the secondary winding of a particular type of transformer. Which type is used?Not learned 73. To properly use a clamp-on type ammeter to check current flow, what must be done FIRST?Not learned 74. What is the circuit shown in the illustration used to measureNot learned 75. How is a wattmeter electrically connected in a circuit?Not learned 76. Which of the listed temperature measuring devices installed on a large turbo-electric alternating current propulsion generator would be the most reliable for monitoring generator temperatures to avoid premature winding insulation failure?Not learned 77. When troubleshooting most electronic circuits, what voltmeter characteristic can minimize the 'loading effect'?Not learned 78. The shaft revolution indicator system for a fixed-pitch propeller has which of the following display capabilities?Not learned 79. Which of the following statements describes the effects of ambient temperature on local action within lead-acid storage batteries?Not learned 80. What material are the plates of a wet cell NiCad storage battery made of?Not learned 81. Why are nickel-cadmium batteries superior to lead-acid batteries for standby service?Not learned 82. What is the ampere-hour rating of a lead-acid battery that can deliver 20 amperes continuously for 10 hours?Not learned 83. According to 46 CFR Subchapter J, what is true concerning the installation of batteries used for diesel engine starting?Not learned 84. What statement is true concerning the actual mixing process and the container used when mixing electrolyte for a lead-acid storage battery?Not learned 85. What statement is true concerning the charging of a 100 amp-hour lead-acid battery?Not learned 86. Which of the substances listed should be applied to battery terminals to help prevent corrosion?Not learned 87. According to 46 CFR, Subchapter J (Electrical Engineering), Which of the following statements concerning battery installations is correct?Not learned 88. Which of the listed battery charging circuits is used to maintain a wet cell, lead-acid, storage battery in a fully charged state during long periods of disuse?Not learned 89. Which of the following activities occurs during the charging process of a lead-acid storage battery?Not learned 90. Why must caution be exercised during the charging of flooded lead-acid storage batteries?Not learned 91. Why should battery rooms be well ventilated during the charging of storage batteries?Not learned 92. What condition associated with a lead-acid battery cell can cause the plates to partially short-out and cause the cell to fail to hold a charge?Not learned 93. What could prevent a lead-acid battery from accepting a full charge?Not learned 94. To keep emergency lead-acid batteries in a full state of charge for emergency use, what is normally done?Not learned 95. What is the nominal open-circuit cell voltage of one lead-acid storage battery cell?Not learned 96. The nominal voltage of one cell of a wet cell nickel-cadmium battery is approximately how many volts?Not learned 97. What is the approximate discharge voltage produced by one cell of a wet type nickelcadmium battery at 75% of charge?Not learned 98. What is the best method of determining the state of charge of a flooded lead-acid storage battery?Not learned 99. What should you be aware of when checking the specific gravity of the battery electrolyte with a hydrometer?Not learned 100. For accuracy purposes, which of the following devices should be used to measure the temperature of a battery electrolyte?Not learned 101. When troubleshooting a lead-acid storage battery, what is the best method for detecting a weak or dead cell?Not learned 102. As the electrolyte level in the cells of a lead-acid battery evaporates over time, what will tend to happen to the specific gravity of the electrolyte in the cells as the level drops due to evaporation?Not learned 103. To determine the state of charge of a nickel-cadmium wet-cell storage battery during charging and discharging, what is the most reliable method?Not learned 104. Assuming that the electrolyte has had sufficient time to be uniformly diffused throughout the cell, if the open-circuit cell voltage as measured by a digital multimeter is 2.12, what would be the approximate specific gravity?Not learned 105. How are the field windings of a DC shunt generator connected?Not learned 106. Why are armature cores in a DC generator made of laminated steel sheets?Not learned 107. As shown in the illustrated DC machine which is configured as a generator, what is the polarity of the interpoles as compared to the main field polesNot learned 108. With what device is the simplest method of controlling the terminal voltage of compound-wound DC generator?Not learned 109. How can the loss of residual magnetism in an alternator with a brushless excitation system be corrected?Not learned 110. If a self-excited DC generator running at rated speed fails to deliver an output voltage, which of the following conditions may be a cause of this difficulty?Not learned 111. What two factors determine the magnitude of the generated voltage of a DC generator?Not learned 112. For the purposes of generating a DC voltage, which of the following factors is subject to vary for a particular generator installation while in operation?Not learned 113. What statement is true concerning the use of commutating poles (also known as interpoles) in DC generators?Not learned 114. What statement is true concerning the use of compensating windings in DC generators?Not learned 115. What is the purpose of the series field used in a stabilized shunt DC generator?Not learned 116. By what means is a DC generator prevented from becoming motorized if paralleling is accomplished without an equalizer?Not learned 117. Which of the methods listed is used to maintain the division of load between two compound-wound, DC generators operating in parallel?Not learned 118. Prior to closing the circuit breaker when paralleling two DC generators, what must you be certain of?Not learned 119. Which of the following types of DC motors is considered to produce the highest starting torque?Not learned 120. In a series wound motor, the current passing through the field windings also passes through what component?Not learned 121. How is the speed of a series wound winch motor controlled?Not learned 122. What type of DC motor is never connected to a belt driven load?Not learned 123. From the instant of start-up, through the acceleration period, and until the motor reaches rated speed, when is the counter EMF produced in the windings of a DC motor "zero"?Not learned 124. In terms of voltage potential and current sources, how are shunt wound, series wound, and compound wound DC motors designed to operate?Not learned 125. What is an advantage of DC motors over AC motors?Not learned 126. Which of the listed conditions will occur if the polarity of the field poles and the direction of current to the brushes of a DC motor were both reversed?Not learned 127. How can the direction of rotation of a DC motor be reversed?Not learned 128. The torque produced by a DC motor armature is the multiplication product of two factors, one being the density of the magnetic flux which is dependent upon the field current. What is the other multiplication factor?Not learned 129. If a D.C. motor hums, but does not run when energized, which of the listed conditions could exist?Not learned 130. What type of motor is generally used in DC propulsion drive systems?Not learned 131. What type of DC motor has extremely high starting torque, but has poor inherent speed regulation?Not learned 132. What type of DC motor has relatively low starting torque, but has excellent inherent speed regulation?Not learned 133. In a shunt wound DC motor, how is the shunt field connected?Not learned 134. What are the characteristics of the field winding of a shunt wound motor?Not learned 135. Which of the listed DC compound motor connection schemes is the most commonly used?Not learned 136. When a compound wound DC motor is cumulatively compounded, what does this mean?Not learned 137. Assuming that a cumulatively compounded DC motor is fitted with interpoles and compensating windings, normally how is the direction of rotation in such a DC motor reversed?Not learned 138. What is the purpose of the commutator and brushes on a DC generator?Not learned 139. What can cause uneven wear of the commutator surface on a direct current generator?Not learned 140. In addition to improper brush pressure or seating, what can result in excessive sparking at the brushes of a DC propulsion motor?Not learned 141. What may cause brush sparking in a DC generator during commutation?Not learned 142. Which of the listed conditions will occur if dirt and grease are allowed to accumulate between the commutator segments of a DC motor?Not learned 143. In general, what can cause D.C. propulsion motor brush sparking to be excessive?Not learned 144. What should be used in the cleaning of a D.C. propulsion motor's commutator face?Not learned 145. D.C. propulsion motor brush pressure depends on the brush grade used. In practice with what device is the proper brush pressure established?Not learned 146. What would excessive sparking at the brushes of a running DC motor be an indication of?Not learned 147. What is the most effective method of locating a loose commutator bar in a D.C. motor?Not learned 148. While inspecting the copper commutator bars of a DC generator, you notice a chocolate brown film covering the bars. What should be done?Not learned 149. As the brushes ride on the commutator of a DC generator, eventually mica ridges will form between the bars causing sparking and chipping of the brushes. When this happens the mica must be undercut. To what depth is the mica undercut?Not learned 150. Incorrect brush pressure can result in accelerated brush wear on a DC generator. What statement concerning brush pressure is true?Not learned 151. If a DC generator was disassembled during overhaul, it is important that the brush holder rigging be installed in the neutral plane. On larger machines, if the brush rigging and end bells are not match-marked, what is the correct procedure for determining the neutral setting using factory marks?Not learned 152. If a DC motor has its armature and field connected across a resistor when the motor is disconnected from its power supply, what statement is true?Not learned 153. What is the function of the movable cams in a master-switch winch motor drum controller?Not learned 154. What statement is true concerning speed control of a shunt wound DC motor?Not learned 155. An electrical component is connected across a 120-volt 60 hertz AC supply. What is the current drawn by the component if the impedance is 200 ohms?Not learned 156. An AC circuit has a capacitive reactance of 30 ohms in addition to an inductive reactance of 40 ohms connected in series. What is the total reactance of the circuit?Not learned 157. As shown in figure "B" of the illustration, what would be the circuit impedance if the inductive reactance is 10 ohms and the resistance is 10 ohmsNot learned 158. In the schematic of the electrical circuit shown in figure "A" of the illustration, assuming that C1 and C2 are equal in capacitance, what is the value of the total capacitance, when compared to the value of equal individual capacitorsNot learned 159. What would be the capacitive reactance of the circuit shown in figure "A" of the illustration if the capacitance of C1 was 50 microfarads, the capacitance of C2 was 100 microfarads and the frequency of the source was 60 cycles per second (Hz)Not learned 160. What effect will increasing the power source frequency have in a capacitive circuit?Not learned 161. While standing an "at sea watch" onboard an AC diesel-electric drive ship with a synchronous propulsion motor, you notice that the kwatt load is at roughly 75% of capacity with a leading power factor less than 1. Ideally what would be the character of the power factor associated with the main power distribution including all motors?Not learned 162. Which of the following pictures shown in the illustration is a control transformer, usually used to step down line voltage for supplying reduced voltage control circuitsNot learned 163. Relative to the number of turns of a secondary winding of a step-up transformer, what will be the number of turns of a primary winding?Not learned 164. When a transformer is used to step down voltage, what statement is true?Not learned 165. What is the primary purpose associated with the use of transformers onboard ships with AC generators?Not learned 166. An autotransformer is equipped with a 50% tap, a 65% tap, and an 80% tap. Which of the following statements is true concerning a load connected to the 50% tap?Not learned 167. If the primary winding of a particular voltage transformer rated for a given AC input voltage is mistakenly connected to a comparable steady DC input voltage with similar source impedance, selfinductance and mutual inductance are not possible. As a result, what part of the transformer will result in current overload?Not learned 168. What is the purpose of a potential transformer in an electric circuit?Not learned 169. Which of the following statements about a three-phase wye connected alternator is correct?Not learned 170. An AC generator produces 60 Hz at 1800 RPM. If the generator speed is increased to 1830 RPM, what will happen to the frequency in Hz?Not learned 171. Of the listed factors that influence the magnitude of the voltage induced in the stator windings of an AC generator operating at a constant 60 Hz frequency, some are fixed due to the alternator design and one is variable due to alternator operating conditions. Which of the following listed factors is subject to be variable during generator operation?Not learned 172. How will the value of the output frequency change if the load is removed from a turbogenerator having a governor speed droop setting of 3%?Not learned 173. How are AC and DC generators similar?Not learned 174. A DC generator which is used to supply direct current in order to provide magnetizing current to an AC generator field is commonly known as what?Not learned 175. Which of the methods listed below is used to provide the rotational torque to cause an AC generator to turn?Not learned 176. How may chattering of the collector/slip ring brushes on a generator be remedied?Not learned 177. If a shipboard AC generator experiences a failure to produce a voltage, what may be the cause?Not learned 178. If a 12-pole three-phase synchronous alternator is operating at 590 rpm, what will be its output frequency?Not learned 179. If it becomes absolutely necessary to run an alternator at lower than 5% below its rated frequency, in terms of output voltage, what must be done?Not learned 180. Under unusual circumstances, it may be required to operate a ship's service generator above its rated kVA. What supplemental casualty control action will be required?Not learned 181. When a self-excited alternator's field has lost its residual magnetism due to a prolonged idle period, it will fail to produce a voltage. Flashing the field is the procedure used to restore the residual magnetism. Using a 12 volt storage battery, how is this performed?Not learned 182. If the driving torque, such as that produced by a diesel engine, creates pulsations when coupled with a synchronous generator operating in parallel, the generator rotor may be periodically pulled ahead or behind its normal position as it rotates. How can this condition called hunting be reduced?Not learned 183. When paralleling two alternators the synchronizing lamps grow dim and are totally darkened as the synchroscope pointer approaches the 0° position. What does this indicate?Not learned 184. While paralleling 2 AC generators using synchronizing lamps only, when will both lamps go dark?Not learned 185. Two AC generators are operating in parallel and both are equipped with automatic voltage regulators. While standing watch, one generator is noted as having a greater lagging kvar value. In order to equalize the kvars between the generators manually, what should be done?Not learned 186. No.1 SSDG was operating in parallel with No.2 SSDG in supplying the 480 VAC main bus while sharing the electrical load evenly. As a result of a problem, if No.1 SSDG begins to motorize, but the generator has not yet tripped out by the action of the reverse power relay, what would be the indication of this?Not learned 187. Upon loss of field excitation of a generator operating in parallel with others, what must be done?Not learned 188. Regarding an induction motor, what does the power developed by the rotor automatically adjust itself to?Not learned 189. How is the difference between the synchronous speed of a three-phase induction motor and its operating speed correctly expressed?Not learned 190. Assuming that the 3-phase power source has a phase sequence of A-B-C and that the motor is connected as shown in figure "A", if the motor has a clockwise (CW) rotation, what statement is true concerning the motors connected as shown in the other figuresNot learned 191. What is the most practical method of controlling the RPM of a multi-speed AC motor operating at a constant frequency?Not learned 192. In a three-phase, squirrel-cage type, induction motor, how is the primary rotating magnetic field established?Not learned 193. A degree of control over the speed of a slip ring induction motor can be obtained by what means?Not learned 194. What is the characteristic of a wound-rotor induction motor, with a high resistance inserted in series with the rotor winding at startup?Not learned 195. Which of the following physical characteristics does a three-phase wound-rotor induction motor possess that a squirrel-cage induction motor does not?Not learned 196. What will be the impact of reduced voltage applied to a motor during the starting period?Not learned 197. You are reconnecting a three-phase induction motor to the supply line. To prevent possible damage to the load, due to the wrong direction of rotation, what should be done?Not learned 198. A six-pole three-phase squirrel-cage induction motor operating at 60 Hz is running at 1155 rpm. What is the percentage slip in this case?Not learned 199. Which of the illustrated motors has an open motor enclosureNot learned 200. What would be the synchronous speed of a 24-pole three-phase synchronous motor operating at 20 Hz?Not learned 201. By what means is a synchronous motor started and brought nearly to synchronous speed?Not learned 202. Concerning the operating characteristics of a synchronous motor, what statement is true?Not learned 203. Assuming that a three-phase synchronous motor is separately excited, what statement is true concerning power supplies?Not learned 204. Occasionally a synchronous motor is configured without an external shaft to drive a load. In this case, the sole purpose of the synchronous motor is improving overall power factor of an electrical distribution system. What is the name of the synchronous motor so constructed?Not learned 205. Not only can a synchronous motor drive a load with greater efficiency than an induction motor, a fringe benefit of the synchronous motor is the ability for power factor correction. What statement is true?Not learned 206. Which statement is true concerning a split-phase induction motor?Not learned 207. What is the main purpose of the auxiliary winding on a split-phase, single phase motor?Not learned 208. What type of rotor is most commonly used in the split-phase family of single-phase induction motors?Not learned 209. A shaded-pole motor is a specific type of motor included in what class of motor?Not learned 210. What is the main function in the use of a capacitor for starting a single phase motor?Not learned 211. A split-phase induction squirrel-cage motor will not start and come up to speed, even though the rated voltage and frequency are applied. Assuming that the motor hums without rotating, which of the following troubles would MOST likely be suspected?Not learned 212. Which of the listed motors will operate at the highest RPM, assuming that each operates at the same frequency?Not learned 213. Which type of AC single phase motor will also operate on direct current?Not learned 214. Of the following, what shipboard system is MOST likely to use the synchronous transmission system featuring a transmitter and receiver?Not learned 215. If coil 'R1-R2 -R3' on the transmitter in figure "C" shown in the illustration is turned 30°C lockwise, how will the corresponding coils 'R1-R2-R3' on the receivers (indicators) respondNot learned 216. What is the name of the mechanism used to transmit rudder angle information from the steering gear itself to the wheelhouse in the illustrated rudder angle indicator systemNot learned 217. By what means is the burning of controller contacts due to arcing, when opening, prevented?Not learned 218. The current at which a magnetic-type overload relay tends to trip may be decreased by raising the plunger further into the magnetic circuit of the relay. What effect does this action have?Not learned 219. In order to properly set up programmable motor protection, it is necessary to know the locked rotor current of a motor. Given the illustrated chart of code letters for locked-rotor kVA/HP and the necessary instructions, calculate the estimated locked rotor current for the motor represented by the illustrated motor nameplate using a mid-range value for the code letter, assuming the motor is to run at 440 VACNot learned 220. How are fuses usually rated?Not learned 221. Due to the operating characteristics of the system, time lag fuses (or dual-element fuses) are necessary for use in what types of circuits?Not learned 222. Fuses are sometimes placed in series with a thermal trip-type circuit breaker. What is the purpose of a fuse used in this arrangement?Not learned 223. According to 46 CFR 111.75-5, what would be the maximum amperage load on circuit No.2 (2L110) of the illustrated lighting panel board L110 of the illustrationNot learned 224. What device can be used to check the calibration of a circuit breaker?Not learned 225. In figure "1" of the illustration, what type of circuit breaker trip element is featuredNot learned 226. In general, what type of starter would be used to connect a three-phase induction motor to full line voltage at the instant of start-up?Not learned 227. Autotransformer starters, sometimes called starting compensators, are sometimes used with larger polyphase induction motors. What function do they perform?Not learned 228. What type of AC motor would use a rheostat in the rotor circuit to vary the speed of the motor?Not learned 229. With what kind of starting equipment are most three-phase induction motors of five horsepower or less started?Not learned 230. What is the functional name of an electrical device which prevents simultaneous energization of loads thereby preventing damage or injury?Not learned 231. Which of the following statements represents the main difference between an electromagnetic relay and an electromagnetic contactor as used in motor control and power circuits?Not learned 232. What is the name of the type of motor control circuit that will not permit automatic restarting after power is restored, following a power failure?Not learned 233. Why are electric strip heaters used in motor controllers?Not learned 234. When power is restored after a complete power failure, how will the steering gear pump motor which was on- line respond?Not learned 235. Grounds occurring in electrical machinery as a result of insulation failure may result from deterioration over time and excessive heat. What could be another contributing cause?Not learned 236. When using a megohmmeter to determine which shunt field coil is grounded in a DC machine, what must you do?Not learned 237. As shown in figure "A" of the ungrounded distribution system, under what conditions would an outage likely occur due to a ground fault (or faults) causing a circuit breaker to tripNot learned 238. Which of the following represents a characteristic of an ungrounded electrical distribution system?Not learned 239. The ground indicating light on the main electrical switchboard is indicating a ground. What is the best procedure for locating the grounded circuit?Not learned 240. As shown in figure "B" of the typical ground fault relay shown in the illustration, what statement concerning the leakage current setting adjustment is trueNot learned 241. Besides checking for grounds, for what other purpose can a megohmmeter be used on a DC motor?Not learned 242. Which of the listed pairs of materials make the best insulators?Not learned 243. Which of the following materials is a good electrical insulator?Not learned 244. Which of the conditions listed will indicate the need to clean the insulation on the windings of an electric motor?Not learned 245. When a megohmmeter is being used to test insulation resistance, current leakage along the surface of the insulation is indicated by the megohmmeter's pointer responding in a very unique way. What would be the response of the pointer?Not learned 246. When a megohmmeter is used to test insulation, what condition causes the gradual rise of the pointer reading as a result of continued cranking?Not learned 247. In which of the situations listed will a megohmmeter give the most accurate readings?Not learned 248. When testing insulation resistance of electric equipment and machinery, ideally when should the insulation resistance be tested for the lowest normal insulation values?Not learned 249. When you are making a high potential test (insulation resistance) on the motor coils of repaired electrical machinery to ground, what would a low resistance reading indicate?Not learned 250. What would be the indication of a grounded switch or cable as measured by a megohmmeter?Not learned 251. In testing a hand cranked megger prior to use, what statement is true?Not learned 252. In an ungrounded distribution system, as compared to a normal indication, what is the indication on a switchboard of a current carrying conductor making an accidental electrical contact with a wiring metal conduit?Not learned 253. Which of the following is the only known perfect dielectric for the purpose of serving as electrical insulation?Not learned 254. What property of a material is rated in voltage per millimeter (V/mm) of insulation thickness that the insulation can withstand without breaking down?Not learned 255. What happens to the life expectancy of insulation for each 10°C rise in operating temperature?Not learned 256. Suppose it is desired to determine the integrity of the insulation of a 4160 VAC motor. What type of insulation resistance tester (megger) would be suitable?Not learned 257. For a motor rated at 3.3 kV, what would be a minimum accepted insulation resistance to hull ground as tested by an appropriate megger (insulation tester)?Not learned 258. The electrical energy necessary to power a sound-powered telephone's small vibrating bell is obtained from what power source?Not learned 259. To facilitate communication between the wheelhouse and the steering gear room in a steering emergency where no external source of power is required, what means of two-way communication would be provided?Not learned 260. Which station's emergency loudspeaker must allow for two-way communication?Not learned 261. Assuming the vessel has an engine control room, where is an engineers' assistance-needed alarm required to produce an audible signal?Not learned 262. Besides the fluorescent lamp itself and possibly a starter, which of the following components is included in a fluorescent lighting fixture?Not learned 263. Incandescent lamps are classified according to the shape of the bulb and the type of service, as well as the size and style of the base. How are incandescent lamps rated?Not learned 264. When a fluorescent lamp has reached the end of its useful life, it should be replaced immediately. If not, what condition could the resultant flashing cause?Not learned 265. In the diagram of the switchboard shown in the illustration, if one of the turbines should fail due to a throttle trip, what will happenNot learned 266. In the diagram of the switchboard shown in the illustration, what is the function of the device labeled "GenNot learned 267. By what means is an AC generator prevented from becoming motorized?Not learned 268. The timer element of a reverse power relay cannot be energized unless what condition is met?Not learned 269. What is the name of the part of the shipboard electrical system used to control the distribution of power to the branch circuits?Not learned 270. According to 46 CFR, Subchapter J (Electrical Engineering) regulations, receptacle outlets at or above what voltage are required to have grounding poles?Not learned 271. According to 46 CFR, Subchapter J (Electrical Engineering) regulations, what is the minimum conductor size associated with a 25 or 30 ampere lighting branch circuit supplying a nonswitched cargo hold light fixture?Not learned 272. Upon failure of the normal power supply, by what means is the emergency generator placed on the line and connected to the emergency bus?Not learned 273. In accordance with 46 CFR Part 112, a storage battery for an emergency lighting and power system must have the capacity to accomplish which of the following?Not learned 274. As shown in the illustrated harmonic analysis diagram, which figure represents the third harmonicNot learned 275. For the purposes of high voltage marine practice, what is the threshold voltage where all voltages below this value are considered low voltage?Not learned 276. What is a disadvantage to the use of high voltage systems onboard ship?Not learned 277. What is the most common and reliable type of circuit breaker used for high voltage practice aboard ship?Not learned 278. Some shipboard high voltage systems have the neutral point of the generators bonded to the ship's hull with a neutral grounding resistor. What is the purpose of this resistor?Not learned 279. In addition to high voltage circuit grounding with ground-connecting switching devices, for additional operator safety and confidence, portable grounding straps may be used. What is the proper procedure for connecting these portable grounding straps?Not learned 280. When completing repairs on a high voltage circuit where portable grounding straps were used for increased operator safety and confidence, what is the proper procedure for disconnecting these grounding straps?Not learned 281. When an alternator is to remain idle for even a few days, what should be ensured or manually accomplished?Not learned 282. Which of the following statements, concerning the cleaning maintenance of a brushless generator, is correct?Not learned 283. Which of the following materials is recommended for burnishing the slip rings of an alternator after grinding or turning?Not learned 284. In performing routine maintenance of a ship's service alternator, what should be included?Not learned 285. If rotor-to-stator air gap readings for an electrical generating machine have changed significantly from the last reading, what should be checked?Not learned 286. Rotor-to-stator air gap readings should be periodically taken for electrical generation equipment. What is the best tool to use to take these measurements?Not learned 287. With regard to the maintenance of electrical generating machines with insulated pedestal bearings, what practice should be avoided?Not learned 288. Periodic testing using a special sensing device may be performed to detect potentially dangerous loose or corroded bus bar and controller connections. What is the name of this testing technology?Not learned 289. What should be included in the routine periodic maintenance checks for electrical motors?Not learned 290. Which of the following methods should be used to dress the face of silver-plated contacts?Not learned 291. Referring to the illustration of possible brush holder mounting configurations, which figure is the correct method of configuring the brushholders on a DC generatorNot learned 292. As shown in the illustration of an electrically operated watertight door controller, what type of motor is used to open and close the watertight doorNot learned 293. What can be the cause of excessive heat or burning contacts in an operating motor controller?Not learned 294. Assuming that 450 VAC is the source voltage at the circuit breaker, if 450 volts AC were measured across the load as shown in figure "B" of the illustration, what would this indicateNot learned 295. A 480/120 VAC step-down control transformer is configured as shown in figure "E" of the illustration. When 480 VAC is applied to the primary winding (across H1 and H2), an output of 89 VAC is produced across the secondary winding (across X1 and X2). What fault condition is indicatedNot learned 296. The leads from an ohmmeter are attached to the leads of the opposite ends of an AC induction motor stator coil. If a reading of infinity (OL) is obtained, what does this indicate?Not learned 297. When testing a capacitor with a digital multimeter set up as an ohmmeter, what would be the indication on the display when testing an initially discharged capacitor in good condition?Not learned 298. An open primary coil in a voltage transformer (VT) will be indicated by which of the listed conditions?Not learned 299. When troubleshooting an electronic circuit, an unreliable high resistance "cold" solder joint can be located with the aid of an ohmmeter. Once the problem has been located, what should be done?Not learned 300. Normally, what is the FIRST step in troubleshooting a transistor mounted on a circuit card?Not learned 301. A lightly loaded three-phase squirrel-cage induction motor, while running, begins to vibrate excessively but continues to run. After shutting down the motor, the motor will not restart, but makes growling noises, overheats, and smokes. What caused this?Not learned 302. According to 46 CFR, Subchapter J (Electrical Engineering), when considering replacement, instrument and control wiring in a switchboard is to be of what minimum size?Not learned 303. According to 46 CFR, Subchapter J (Electrical engineering), regulations prohibit the use of portable electric cord or fixture wire aboard ship if that wire or cord is smaller than what size?Not learned 304. According to 46 CFR, Subchapter J (Electrical Engineering), what statement is true concerning the use of twist-on connectors?Not learned 305. According to CFR, Subchapter J (Electrical Engineering), which of the following statements is true concerning flexible electric cord and cable used aboard ship?Not learned 306. You are in the planning stages of making up a portable cable to be used for transmitting power from a battery charger on a ship to a charging receptacle on a lifeboat. According to 46 CFR, Subchapter J (Electrical Engineering), which of the following statements is true regarding the transmitting of power between receptacles?Not learned 307. You are in the planning stages of replacing a battery charger, where an exact duplicate of the charger to be replaced is not available. Obviously the charger must be suitable for the battery to be charged. According to 46 CFR, Subchapter J (Electrical Engineering), which of the following is a true statement concerning battery chargers?Not learned 308. In accordance with 46 CFR, Subchapter J (Electrical Engineering), each diesel engine driven generator prime mover must have an over speed device, independent of the normal operating governor. If in testing the over speed device, what should be the trip point setting in terms of rated speed?Not learned 309. You are in the planning stages of setting the instantaneous trip of a ship's service generator circuit breaker. According to 46 CFR, Subchapter J (Electrical Engineering), what statement is true regarding the criteria for the instantaneous trip set point, assuming the generator is capable of being paralleled?Not learned 310. There are very specific rules that govern the testing of generators found in the appropriate publication incorporated by reference. According to 46 CFR, Subchapter J (Electrical Engineering), which agency publishes the rules for the construction and testing of generators?Not learned 311. Suppose a cargo vessel of 1600 gross tons or more is fitted with emergency storage batteries for the purpose of supplying emergency lighting and power. According to 46 CFR, Subchapter J (Electrical Engineering), the capacity of the storage batteries is such that they should be able to successfully power the emergency loads for a period of 18 hours. Beginning with fully charged batteries, what is the minimum allowable voltage of the batteries after the 18 hour discharge period assuming a nominal voltage rating of 24 VDC and operating at rated capacity.Not learned 312. Suppose a cargo vessel of 1600 gross tons or more is fitted with emergency storage batteries for the purpose of supplying emergency lighting and power. According to 46 CFR, Subchapter J (Electrical Engineering), the capacity of the storage batteries is such that they should be able to successfully power the emergency loads for a period of 18 hours. Beginning with fully charged batteries, what is the minimum allowable percentage of the voltage rating of the batteries after the 18 hour discharge period assuming a nominal voltage rating of 24 VDC and operating at rated capacity.Not learned 313. In accordance with 46 CFR Subchapter J (Electrical Engineering), on vessels equipped with both temporary and final emergency power sources, emergency generators are required to automatically start upon a loss of normal supply voltage. In conducting a test of the emergency generator automatic transfer of load function, if the normal system supply voltage is 450 VAC, to what value would the emergency generator output voltage have to rise to trigger the automatic transfer of emergency loads to the emergency generator?Not learned 314. Emergency generators are required to automatically start upon a loss of normal supply voltage, according to 46 CFR, Subchapter J (Electrical Engineering). In conducting a test of the emergency generator automatic transfer of load function, if the normal system supply voltage is 480 VAC, to what value would the normal source output voltage have to rise to trigger the automatic transfer of emergency loads back to the normal power source?Not learned 315. In accordance with 46 CFR Subchapter J (Electrical Engineering), which of the following starting aids is the ONLY method allowed to ease the starting of emergency diesel-generator engines?Not learned 316. According to 46 CFR, Subchapter J (Electrical Engineering), in response to a loss of normal power or a simulated test, when will the emergency loads automatically be transferred to the emergency diesel generator?Not learned 317. In accordance with 46 CFR Subchapter J (Electrical Engineering), emergency diesel engine starting systems are required to have sufficient capacity to provide power for at least how many consecutive starts?Not learned 318. What is the shape of the schematic symbol for an operational amplifier used in an analog circuit?Not learned 319. How may temporary repairs to an open DC propulsion armature coil be made, allowing continued operation until permanent repairs can be made?Not learned 320. In a diesel-electric plant, raising the generator's field excitation current will have what effect on the DC propulsion motor speed?Not learned 321. Ships requiring extremely rapid maneuvering response using propeller shaft speed and direction as the sole means of controlling propeller thrust are most likely to use what type of drive system?Not learned 322. What is one major advantage of a diesel-electric propulsion plant?Not learned 323. How is the main propeller shaft rotation of a rectified DC diesel-electric drive normally reversed?Not learned 324. While standing an "at sea watch" onboard a modern rectified DC diesel-electric drive ship you notice the transformer core temperature slowly rising. What should be your FIRST action?Not learned 325. How is the main shaft rotation on an AC diesel-electric propulsion vessel normally reversed?Not learned 326. By what common means is the speed of the AC propulsion motor on a diesel-electric propulsion ship controlled?Not learned 327. Which of the following is a disadvantage of electric drive propulsion systems?Not learned 328. On a vessel with turbo-electric drive, which of the following conditions would indicate that the propulsion motor had dropped out of synchronization with the propulsion generator?Not learned 329. Which statement is TRUE concerning electric propulsion drives?Not learned 330. An electric propulsion drive system in which the propulsion generator supplies power to both the propulsion motor and ship service loads is referred to as what type of system?Not learned 331. What equipment for modern SCR rectified DC propulsion drive systems is usually included in the package?Not learned 332. What statement is TRUE concerning the Azipod propulsion system?Not learned 333. In a podded azimuthing propulsion system, how is three-phase, frequency and voltage-controlled power delivered to the synchronous propulsion motor stator windings?Not learned 334. In an azipod propulsion system, how is direct current delivered to the synchronous propulsion motor rotor for synchronous operation?Not learned 335. In an azipod propulsion system, how is the azipod unit itself rotated for the purposes of directing the thrust in accordance with steering commands from the bridge?Not learned 336. Which of the electronic schematic symbols represents the capacitor illustrated in figure 4 of the illustrationNot learned 337. What is the name of the semiconductor that decreases in resistance with an increase in temperature?Not learned 338. What does the symbol in figure "1" shown in the illustration representNot learned 339. A silicon controlled rectifier (SCR) is a solid state device used for what functional purpose?Not learned 340. In referring to figure "A" of the illustration, what type of active filter circuit is shownNot learned 341. Which of the following statements concerning analog and digital devices is correct?Not learned 342. Silicon diodes which are designed for a specific reverse breakdown voltage, and are most often used as electronic power supply voltage regulators, are specifically what type of diode?Not learned 343. Which of the following statements correctly applies to bipolar junction transistors?Not learned 344. A common-emitter circuit has an input voltage of 0.1 volt, an output voltage of 2.0 volts, an input current of 0.5 milliamps, and an output current of 10 milliamps. What is the power gain?Not learned 345. Which of the procedures or conditions listed could result in damaging a transistor beyond repair?Not learned 346. A signal derived from a device output and returned to the device input is called what type of signal?Not learned 347. A voltage amplifier has a calculated voltage gain of 5. Which statement is true concerning input and output voltages?Not learned 348. How are operational amplifiers, used primarily in analog circuits, characterized?Not learned 349. As shown in all four diagrams included in the illustration, what type of logic circuit is representedNot learned 350. Which of the following statements represents an application of a silicon controlled rectifier?Not learned 351. On vessels with AC distribution systems, which of the following statements represents the most difficult problem involved in obtaining a DC potential suitable for use by computer components?Not learned 352. A full-wave rectifier has one diode burned out in an open condition, what will be the output characteristic of the device?Not learned 353. If an 8-bit digital to analog converter (DAC) produces an analog output voltage with a range of 10 volts (0-9 volts), what is the smallest incremental step in voltage that can be generated at the output?Not learned 354. A pyrometer indicating system such as that used for measuring diesel engine exhaust system temperatures uses what technology?Not learned 355. A bearing temperature monitoring system such as that used for measuring selected propulsion plant bearings uses what technology?Not learned 356. As shown in the illustrated block diagram for a programmable logic controller system, in what functional component is the program developed and used to transfer the program to the processor module of the PLCNot learned 357. As shown in figure "A" of the illustrated PLC sub-circuit, what type of circuit is depictedNot learned 358. If both the 'high level' and 'low level' alarms come on for the same address of a centralized control console, what is the most likely failure?Not learned 359. What statement is true concerning read only memory (ROM)?Not learned 360. What statement is true concerning random access memory (RAM)?Not learned 361. Which of the following devices represents primary storage, where the processor is able to directly read instructions and data and directly return results of its computation in fetch/execute cycles?Not learned 362. Which of the following data communication cable types offers the greatest immunity to electromagnetic "noise"?Not learned 363. What type of local area network physical topology features point-to-point interconnection between all communicating devices and is the least vulnerable to a break in communication?Not learned 364. Modern ships use multiple computers arranged in a client/server network to perform various shipboard functions. What type of computer network would most likely be used aboard ship?Not learned 365. What Ethernet cabling technology supports the greatest data transfer speeds?Not learned 366. If a computer display is flickering, how may this be remedied?Not learned 367. A 4160/480Y-277 VAC three phase power transformer bank as configured in figure "3" of the illustration produces the following voltages when 4160 VAC is applied across A1 to B1, B1 to C1, and C1 to A1. What condition is indicated? Illustration EL-0084 • A2 to B2: 480 VAC • B2 to C2: 0 VAC • C2 to A2: 0 VAC • A2 to N2: 277 VAC • B2 to N2: 277 VAC • C2 to N2: 0 VACNot learned 368. A 480/120 VAC step-down control transformer is configured as shown in figure "E" of the illustration. When 480 VAC is applied to the primary winding (across H1 and H2), an output of 141 VAC is produced across the secondary winding (across X1 and X2). Although the fault may ultimately result in a catastrophic failure, what hypothetical fault condition is indicated that would account for these voltagesNot learned 369. The AC winch hoist controller shown in the illustration has a burned out hoist contactor coil that must be replaced. Before replacing the coil, the cause for the burnout must be determined. Which of the following statements represents the possible causeNot learned 370. An AC winch hoist controller such as shown in the illustration has welded contacts on the hoist contactor, and the contacts must be replaced. Before replacing the contacts, the cause for the welding of the contacts must be determined. Which of the following statements describes the possible causesNot learned 371. In accordance with 46 CFR Subchapter J (Electrical Engineering), on vessels equipped with both temporary and final emergency power sources, emergency generators are required to automatically start upon a loss of normal supply voltage. When the potential of the normal source is eventually restored, what statement is true?Not learned 372. (1.1.4.1.1-4) In actual applications, electrical connections associated with "R1, R2 and R3" of the transmitter to "R1, R2, and R3" of the indicators shown in figure "C" of the illustration are made by what meansNot learned 373. What is an ammeter used to measure?Not learned 374. In what applications are semiconductor diodes commonly used?Not learned 375. What application would the switchboard instrumentation panel shown in the illustration best be suited forNot learned 376. The arc resulting from the tripping of a circuit breaker is prevented from damaging the contacts. How is this done?Not learned 377. Assuming the ladder diagram of figure "1" and the corresponding input/output diagram of figure "2" represents a simple PLC motor controller, what statement is trueNot learned 378. Assuming that a ship's service generator is directly coupled to the prime mover, what condition must cause a prime mover to automatically shutdown?Not learned 379. What is the basic similarity between a circuit breaker and a fuse?Not learned 380. When a battery-operated megohmmeter (insulation tester) is used to perform a dielectric absorption test, the resistance is measured and recorded from each conductor to ground each minute for 10 consecutive minutes. What condition accounts for a gradual rise in resistance each successive minute?Not learned 381. What can be the cause of excessive heat or burning contacts in an operating motor controller?Not learned 382. What is the characteristic that is associated with an "instantaneous-trip" single-element type fuse?Not learned 383. What does the circuit shown in the illustration representNot learned 384. By what common means is the speed of an AC propulsion motor on a diesel-electric propulsion ship controlled?Not learned 385. A common type of molded case circuit breaker has both thermal and magnetic trip elements. If a branch circuit breaker has only thermal or magnetic trip elements (but not both), it is common to use multiple series-connected protective devices to provide both short-circuit and overload protection. If a motor branch circuit is protected with both a thermal trip-type circuit breaker and fuses, what is the protective purpose of the fuses used in this arrangement?Not learned 386. The component labeled "CR1" in the circuit shown in the illustration serves what functional purposeNot learned 387. Concerning figure "A" of the illustration, if the illustrated PLC ladder diagram is for a simple motor controller, what does "Input A" representNot learned 388. Concerning the illustrated fire detection and alarm system, when the system is operating normally and under supervision, what is the status of the ground detector and the fire alarm relaysNot learned 389. Concerning the illustrated motor controller circuit, where is the location of the motor "run" indicator lightNot learned 390. Which of the conditions listed will indicate the need to clean the insulation on the stator windings of an alternating current induction motor?Not learned 391. If the cooling water system is isolated for repairs, but in an operational emergency, it is still desirable to run the alternator pictured in figure "A" of the illustration, what must be doneNot learned 392. What is the correct term for the fluctuation of voltages in figure "H" shown in the illustrationNot learned 393. What is the current flowing through R in figure "B" of the illustrated circuit when the switch is closed 3 if the battery voltage is 12 VDC and resistance of R is 2 ohms, R is 3 ohms, and R is 6 ohms, 1 2 3 respectivelyNot learned 394. It is desired to add additional 120 VAC, 100 watt lighting fixtures in the accommodations, port side fed from circuit No.1 (1L110) as illustrated in the lighting panel L110 of the illustration. According to 46 CFR 111.75-5, what would be the maximum allowable additional lighting fixtures that could be installedNot learned 395. In the diagram of the switchboard shown in the illustration, what is the purpose of the current transformersNot learned 396. Diesel-generators #1 and #2 are operating in parallel with each machine operating at half-capacity. Diesel-generator #1 suddenly trips out mechanically due to low lube oil pressure. The reverse power relay functions properly and trips generator #1 electrically off the board. In the absence of an automated power management system, which of the following actions should you carry out FIRST?Not learned 397. If a digital multimeter is setup as shown in figures "A" and "B" of the illustration, what is the status of the silicon diode if the display reads 4.7 ohms when configured as in figure "A" and reads 490 ohms when configured as in figure "B"Not learned 398. A digital multimeter is set up as shown in the illustration to test an individual element of a three- phase immersion heater. The elements are connected across terminals 1 and 4, 2 and 5, and 3 and 6 as shown. The reading across terminals 1 and 4 is 32 ohms. The reading across terminals 2 and 5 is 32 ohms. The reading across terminals 3 and 6 as shown is "OL" ohms. What condition is indicatedNot learned 399. What effect will increasing the power source frequency have on the capacitive reactance of a capacitive circuit?Not learned 400. In figure "2" of the diagram shown in the illustration, the three-phase power transformer has a step- down turns ratio of four to one. If a three-phase 440 volt supply is connected to terminals "A1-B1- C1", what voltage should develop across terminals "A2-B2-C2"Not learned 401. In figure "2" of the diagram shown in the illustration, the three-phase step-down power transformer has a turns ratio of four to one. If a three-phase 480 volt supply is connected to terminals "A1-B1- C1", what voltage should develop across terminals "A2-B2-C2"Not learned 402. In figure "4" of the diagram in the illustration, the three-phase step-down power transformer has a turns ratio of five to one. If a three-phase 4160 volt supply is connected to terminals "A1-B1-C1", what voltage should develop across terminals "A2-B2-C2"Not learned 403. What does figure "C" of the illustration representNot learned 404. Which figure represents the schematic symbol shown in figure "2"Not learned 405. In the flow of one cycle of single phase alternating current past any given point in a circuit, how many times will the current peak to a maximum or minimum?Not learned 406. In which of the following branch circuits types would time lag fuses (or dual-element fuses) be MOST likely used?Not learned 407. Which of the following contactors or relays has a timing function for the transition from start to runNot learned 408. Which of the following figures shown in the illustration represents incandescent lightingNot learned 409. Which of the following illustrated manual motor starters represents the wiring diagram illustrated in figure "A"Not learned 410. Which of the following motors has a frame configuration for solid base mounting onlyNot learned 411. Which of the following pictures represents a magnetic reversing or two-speed motor starterNot learned 412. Which of the following procedures represents the best method to prevent the freezing of lead-acid batteries continuously exposed to low temperatures?Not learned 413. Which of the following statements concerning figure "6" of the illustration is trueNot learned 414. Which of the following statements concerning nickel-cadmium batteries is true?Not learned 415. Which of the following statements is TRUE concerning Azipod propulsion systems?Not learned 416. Which of the following statements is true concerning step-down transformer operation?Not learned 417. Four incandescent lamps are connected in series in a single circuit. If one of the lamp filaments burns out, what will happen to the other lamps?Not learned 418. What is the functional purpose of a generic electromagnetic relay?Not learned 419. What is the functional purpose of the "LSL" contacts for the hoist controller circuit shown in the illustrationNot learned 420. What is the functional purpose of the "MS 2" contacts in the hoist controller circuit shown in the illustrationNot learned 421. What is the functional purpose of the resistor 'RL" placed in parallel to the output of a DC power supply as shown in section "D" of the regulated DC power supplyNot learned 422. When regreasing the electric motor bearing as shown in figure "B" of the illustration, what practice should be avoidedNot learned 423. What will happen to the total effective circuit resistance when additional parallel circuits are added to a circuit?Not learned 424. High-pressure compressed air should not be used to clean electric motors or controller equipment. Why not?Not learned 425. If the illustrated device in figure "B" has a step-up ratio of 10 to 1 what voltage would be measured at the secondary shortly after the primary of the device is connected to 110 volts DC and the primary current stabilized with a current of 12 ampsNot learned 426. In the illustration of the one-line distribution system diagram, if at sea the 450 VAC section of the main switchboard experiences a complete loss of power, what statement is true concerning the operation of the emergency diesel-generatorNot learned 427. In the illustrated solid-state "soft" starter for a three phase induction motor as shown in figure "A", what is the name of the devices that are controlled by the gate control circuitsNot learned 428. In the illustration, 1, 2, 3 and 4 are 12-volt batteries. What will be the nominal voltage as read by a voltmeter across the output of the battery bankNot learned 429. The individual 12-volt lead-acid batteries, when connected as shown in the illustration, as a battery bank would produce how many voltsNot learned 430. From the information given in the illustration, which of the following statements is correctNot learned 431. From the information given in the illustration, what would be the ampere capacity at full load of each of the main ship service diesel-generators if operating at the rated power factor of 0Not learned 432. From the information given in the illustration, what would be the maximum output amperage available from the emergency generator if it operated with a power factor of 0Not learned 433. The lamp-type ground detection circuit on the main electrical switchboard is indicating a ground. When safe to do so, what is the MOST effective and practical procedure for locating the distribution system ground?Not learned 434. Large machines undergoing a resistance insulation testing using a megohmmeter should be discharged to remove any accumulated electrostatic/capacitive/dielectric-absorption charge stored. When should this discharge be performed?Not learned 435. Which line in figure "B" shown in the illustration represents the trailing edge of the waveNot learned 436. Which of the listed conditions occur when selection is made for "third point hoist" on the winch hoist controller shown in the illustrationNot learned 437. Which of the listed figures shown in the illustration represents a three-phase transformer connected in a wye- wye configurationNot learned 438. A low voltage, high current testing unit consisting of an autotransformer, ammeter, and timer may be used to test the proper tripping function of a three-pole magnetic circuit breaker. What is the correct procedure for using this apparatus?Not learned 439. How is the main propeller shaft rotation of a rectified DC diesel-electric drive normally reversed?Not learned 440. The motor fails to start on an attempted startup. With the start button depressed, a voltmeter reading between 1 and 5, as illustrated in figure "A", indicates line voltage available to the control circuit, what should be your next step in the troubleshooting processNot learned 441. The motor of the illustrated motor controller fails to start on an attempted startup. You ensure the motor has not tripped out on overload, and you check the disconnect switch closed. With the start button depressed, a voltmeter reading between 3 and 4, as in figure "A" shown in the illustration, indicates line voltage. After re- opening the disconnect switch and verifying the circuit de-energized, what should be your next step in the troubleshooting processNot learned 442. If the motor shown in the illustration will not start when the "off-run" switch is placed in the run position, which of the listed components should be checked FIRSTNot learned 443. What is the name of the component labeled CR1 as shown in section "D" of the regulated DC power supply illustratedNot learned 444. What is the name of the DC motor speed control method utilized as shown in figure "A" of the illustrationNot learned 445. What is the name for the device shown in figure "A" of the illustrationNot learned 446. What is the name of the device that works in conjunction with an automatic voltage regulator and is used as the source of magnetizing direct current delivered to the rotating field of an AC generator?Not learned 447. What is an ohmmeter used to measure?Not learned 448. What is the operating function of a cycloconverter (CCV) as a static power converter used in electric propulsion motor drives?Not learned 449. What are the operational characteristics of the split-phase motor shown in figure "A" of the illustrationNot learned 450. In order to definitively determine whether or not fuse "1", shown in the illustration is blown using an on-line testing technique, across what points would you connect the voltmeter leadsNot learned 451. If overloading an electric motor becomes necessary in an emergency situation, what should be done to prevent damage to the motor while allowing sustained operation?Not learned 452. Which pair of safety disconnect switches shown in the illustration represents the exterior and interior views of a double-throw switchNot learned 453. When paralleling an incoming alternator with the bus manually, the synchronizing lamps grow dim and become totally darkened as the synchroscope pointer slowly approaches the 12:00 position while rotating in the fast direction. What does this indicate?Not learned 454. Which of the pictured motors within the split phase family of single phase induction motors represents a split phase, resistive start, induction run motorNot learned 455. Which of the pictured solid state semiconductor devices is a light-emitting diodeNot learned 456. You are in the planning stages of setting the longtime overcurrent trip of a ship's service generator circuit breaker. According to 46 CFR, Subchapter J (Electrical Engineering), what statement is true regarding the criteria for the longtime overcurrent trip setpoint, assuming the generator is capable of being paralleled?Not learned 457. In preparing a battery-operated digital megohmmeter (resistance tester) for use, what statement is true?Not learned 458. What is the primary means by which an electrical maintenance worker is protected from electrical hazards while performing work on an electrical circuit?Not learned 459. After prior isolation and lock-out/tag-out procedures are performed, which electrical device requires discharging any stored electrical energy before any work may safely begin?Not learned 460. To properly use a clamp-on-type ammeter for measuring current accurately, what must be done?Not learned 461. The propulsion motor most often utilized in an AC drive system operating in the moderate to high power range is of what type?Not learned 462. What is a purpose of the automatic bus transfer device shown in the illustrationNot learned 463. What is the purpose of an electromagnetic relay?Not learned 464. What is the purpose of the inner phosphor coating of the fluorescent tube as shown in figure "A" of the illustrationNot learned 465. Refer to the diagram of the AC turbo-electric drive system as shown in the illustration. The propulsion motor operates from maneuvering speed to full ahead speed in the ahead direction. The propulsion motor will not operate at any speed in the astern direction. What is most likely the problemNot learned 466. Refer to figures "1" and "2" of the basic synchronous transmission system shown in the illustration. Figure "1" shows a properly connected system where the receiver TR remains in correspondence with the transmitter TX. In figure "2", although properly zeroed, the receiver goes out of correspondence with the transmitter due to improper connections resulting in reverse torque direction. Which connection error results in this behaviorNot learned 467. Refer to figure "A" representing an electric oven as shown in the illustration. With the oven turned on, the power available indicator light is off, the oven on indicator light is off, and only elements "6" and "7" appear to be producing heat. Which fuse is blownNot learned 468. Refer to the simplified diagram of the AC synchronous electric motor drive system as shown in the illustration. The propulsion motor operates from maneuvering speed to full ahead speed in the ahead direction. The propulsion motor will not operate at any speed in the astern direction. What is most likely the problemNot learned 469. Referring to the containership one-line distribution diagram shown in the illustration, what is the purpose of the feedback circuit breaker as used to bypass the automatic bus transfer deviceNot learned 470. Referring to the containership one-line distribution diagram shown in the illustration, what is the purpose of the transformers providing power to the refrigerated container feeder busNot learned 471. Referring to the containership one-line distribution diagram shown in the illustration, what statement is true concerning the battery chargerNot learned 472. Referring to figure "2" of the illustration, if the inputs at A and B are both "0", what will be the outputs at "C", "D", "E", and "F" respectivelyNot learned 473. Referring to figure "3" of the illustration, what type of logic gate is symbolizedNot learned 474. Referring to figure "B" of the illustration, what statement is trueNot learned 475. Referring to figure "B" of the illustration, what statement is trueNot learned 476. In referring to figure "E" of the illustration, what statement is true concerning the functional purpose of the coupling transformerNot learned 477. In referring to figure "F" of the illustration, what statement is true concerning the functional purpose of the RC couplingNot learned 478. In referring to the frequency response filters shown in the illustration, what determines the band pass or band stop frequencies as appropriateNot learned 479. In referring to the graphs shown in the illustration, which of the following figures represents a bandpass filterNot learned 480. In referring to the illustration of the elementary DC generator, what statement is trueNot learned 481. Referring to the illustration pertaining to an alternator protection and alarm system, what statement is true concerning the component labeled "LO"Not learned 482. Referring to the illustration pertaining to the semi-automatic navigation light panel circuit, assuming that the transfer switch is in the primary lamp position, in addition to the buzzer sounding, what will be the response of the indicator lamps when the primary lamp of the particular navigation light burns outNot learned 483. Referring to the illustration pertaining to the semi-automatic navigation light panel circuit, if the buzzer sounds and the masthead indicator light comes on, what statement is true concerning acknowledging and responding to the alarm while minimizing the danger to navigationNot learned 484. Referring to the illustration pertaining to a steering system hydraulic power unit motor controller, what statement is true concerning a response to a motor overload condition as visualized by the indicator lampsNot learned 485. Referring to the illustration, what is the position of the three circuit breakers labeled in figure A, B, and C respectivelyNot learned 486. Referring to the illustration of a steering gear hydraulic power unit motor controller, if the motor is drawing current no greater than full load current, what will the status of the overload relay contacts and the control relay contacts beNot learned 487. In referring to the illustration of the Ward-Leonard drive system, what type of DC generator is usedNot learned 488. Referring to the impressed current cathodic hull protection system shown in the illustration, if required to control the impressed current to the anodes manually by using the hand adjustment potentiometer, what parameter should be maintained at a constant valueNot learned 489. Referring to the impressed current cathodic protection system shown in the illustration, if required to control the current to the anodes manually by using the hand adjustment potentiometer, what statement best represents the changes that should prompt one to recheck the reference electrode voltage (hull potential)Not learned 490. Referring to the sound-powered telephone circuit shown in the illustration, in what component are the sound-powered transmitter and receiver units locatedNot learned 491. Referring to the sound-powered telephone circuit shown in illustration, what statement is true concerning the button on the handset as represented by the component labeled "A"Not learned 492. Referring to the sound-powered telephone circuit shown in the illustration, what statement is trueNot learned 493. Regulations require that shipboard cabling use stranded copper conductors. Why is copper a superior conductor compared to aluminum?Not learned 494. What is the most reliable and preferred method for determining the state of charge of a wet cell NiCad battery while it is being charged?Not learned 495. You are replacing a three-phase induction motor in an application where equipment could be damaged if the direction of rotation of the motor is incorrect when connected. Assuming that even momentarily jogging the motor could damage equipment and that the feeder phase sequence is ABC clockwise as tested with a phase sequence indicator, what should then be done to ensure that the motor rotation will be correct (clockwise) when connected electrically to the line and mechanically to the load? Assume that the power is off and that the contact-type motor rotation indicator leads are connected to the motor terminals.Not learned 496. What is the resistance reading at "1" on the megger scale illustrated in figure "A"Not learned 497. The root mean square (RMS) value of a sine-wave current may also be referred to as what value?Not learned 498. In the schematic of the electrical circuit shown in figure "A" of the illustration, what is the value of the total capacitance, when compared to the value of equal individual capacitorsNot learned 499. How is seating of new brushes on a DC motor commutator accomplished?Not learned 500. In which section of the 24 VDC power supply circuit illustrated does the greatest change in voltage level take place when fed from 120 VAC ship's powerNot learned 501. When shore power is being connected to a ship in drydock, what must be ensured, assuming that the ship's generators are rated at 450 VAC, 60 Hz with a total capacity of 5000 kW?Not learned 502. As shown in the cutaway view of the lead-acid battery in figure "A" of the illustration, if one-half of the battery's cells are revealed by the cutaway section (with the other half remaining hidden from view), what is the nominal output voltage of the batteryNot learned 503. As shown in figure "6" of the illustration, what does the symbol represent as used in electrical drawingsNot learned 504. As shown in figures "A", "B", "C", and "D" of the illustration, what is the usual means by which the rotation direction of the motor is reversedNot learned 505. As shown in figure "A" of the illustration, what does the M-G set's three-phase drive motor mechanically driveNot learned 506. As shown in figure "B" of the illustration, what statement is true concerning "regenerating" operationNot learned 507. As shown in figure "C" of the illustration, what type of timer is representedNot learned 508. As shown in figure "A" of the digital multimeter screen shown in the illustration, what would be the significance of the symbol indicated by "1" being illuminatedNot learned 509. As shown in figure "D" of the illustrated digital power meter, what type of single-phase load is under test for power measurementNot learned 510. As shown in figure "A" of the illustrated motor nameplate, how much current could the motor safely draw on a continuous basis at sea level without overheatingNot learned 511. As shown in figure "A" of the illustrated propulsion motor variable speed drive, what statement is trueNot learned 512. As shown in figure "A" of the illustration, the actual rudder angle repeatback signal originates at what device and is delivered to what other deviceNot learned 513. As shown in figure "A" of the illustration, what input conditions are required to produce an outputNot learned 514. As shown in figure "A" of the illustration, the load-commutated inverter drive illustrated has how many pulsesNot learned 515. As shown in figure "A" of the illustration, what phenomenon is illustrated with respect to electrical cables and groundNot learned 516. As shown in figure "A" of the illustration, what is the purpose of the "test button"Not learned 517. As shown in figure "A" of the illustration, with the switch closed what statement is true if "R1" and "R2" have unequal resistance valuesNot learned 518. As shown in figure "A" of the illustration, what type of ground fault detection system is illustratedNot learned 519. As shown in figure "A" of the illustration, what would be the circuit impedance if the capacitive reactance is 10 ohms and the resistance is 10 ohmsNot learned 520. As shown in the illustrated block diagram for a distributed automation system, what statement is true concerning the units labeled "ROS" which are remote operating system workstationsNot learned 521. As shown in the illustrated block diagram for a distributed automation system, what statement is true concerning the workstations labeled "LOS" associated with the port power management systemNot learned 522. As shown in the illustrated devices and symbols, which of the symbols shown in the illustration represents a standard normally closed relay contactNot learned 523. As shown in the illustrated diagnostic setup for locating a shorted field coil of a ten-pole synchronous motor, if 240 VAC/60 Hz is applied across the brushes, what would be the individual voltage drops measured across each field coil assuming that none of the field coils are shortedNot learned 524. As shown in the illustrated feeder disconnect controller, what statement is trueNot learned 525. As shown in the illustrated one-line diagram of a two-tiered emergency power system for a passenger ship, what statement is trueNot learned 526. As shown in the illustrated plots of uncorrected and temperature corrected insulation resistance readings for a particular piece of equipment, at what point in time should the equipment have been refurbished or replacedNot learned 527. As shown in the illustrated steering hydraulic pump motor controller, what statement is trueNot learned 528. As shown in the illustrated wound-rotor induction motor, what statement is true concerning motor lead connectionsNot learned 529. As shown in the illustration, which brush holder is of the reaction typeNot learned 530. As shown in the illustration, which brush holder would be appropriate to use in a bidirectional motorNot learned 531. As shown in the illustration, the change-over switch is what type of deviceNot learned 532. As shown in the illustration of an electrically operated watertight door controller, how is the motor stopped automatically when the door is wedged closedNot learned 533. As shown in the illustration of an electrically operated watertight door controller, how is reversal of the direction of the DC motor rotation achievedNot learned 534. As shown in the illustration of an electrically operated watertight door controller, how is reversal of the direction of motor rotation achievedNot learned 535. As shown in the illustration, which of the following pieces of equipment is supplied with a circuit breaker providing both overload and short-circuit protectionNot learned 536. As shown in the illustration, by what means are all the "MS" contacts opened and closedNot learned 537. As shown in the illustration, by what means are all the "MS" contacts opened and closedNot learned 538. As shown in the illustration, if the port propulsion motor field excitation circuit experienced a failure of an individual component, of the following listed field excitation circuit components, the failure of which component would allow the use of the standby excitation transformer and field controller to resume normal operationNot learned 539. As shown in the illustration, what is responsible for maintaining the "UV" relay energized when the master switch handle is moved away from the "off" positionNot learned 540. As shown in the illustration, how are the rotor windings (terminating as marked motor leads M1, M2, and M3) of the motor configuredNot learned 541. As shown in the illustration, what statement is true concerning each of the system gatewaysNot learned 542. As shown in the illustration, what type of motor and motor starter are featuredNot learned 543. As shown in the illustration of a vessels navigational lighting circuit, if port running light "1" burns out, the trouble buzzer will sound and the port running light trouble lamp will illuminate. Switching to port running light "2" clears the alarm. If port running light "1" is replaced with a light of a smaller wattage and the circuit is switched back to port running light "1", which of the following is trueNot learned 544. As shown in the illustration, the wet cell storage batteries are connected in what configurationNot learned 545. As shown in the two-speed single winding three-phase motor connection diagrams illustrated in figure "B", what is the connection scheme associated with low-speed operationNot learned 546. A silicon-controlled rectifier (SCR) is a solid-state device used for what functional purpose?Not learned 547. In what situation would an electrical phase sequence indicator be useful?Not learned 548. During the start-up of the circuit shown in figure "B" of the illustration, it is noted that the ends of component "4" remain lighted but the tube does not illuminate. What is likely the cause of this problemNot learned 549. What statement is true concerning the electrical diagrams for the motor controller shown in the illustrationNot learned 550. What statement is true concerning the "MS 1" contacts of the master switch shown in the illustrationNot learned 551. On a steamship, if No.1 SSTG fails to produce a voltage while in the automatic voltage control mode, but successfully produces a voltage while in the manual control mode, what statement is true?Not learned 552. If the supply voltage is 220 volts 60 Hz, what is the operating voltage of the motor controller control circuit illustrated in figure "A" of the illustrationNot learned 553. Suppose it is desired to connect a dual voltage three-phase squirrel-cage induction motor for low volts, but it is undetermined whether the nine-lead motor is internally configured for wye or delta configuration. Using an ohmmeter, the motor itself with leads disconnected, and the illustration as a guide, what statement is trueNot learned 554. A thermal-magnetic molded case circuit breaker for a 300 kW alternator is rated at 500 amperes at full continuous load. Which of the following conditions will MOST likely trip the breaker?Not learned 555. If a three-phase motor controlled by the control circuit illustrated in figure "B" of the illustration, is running in the forward direction, which of the following sequences must occur before the motor will reverse rotationNot learned 556. The torque load that a synchronous motor can handle is dependent on the hold-in strength of the poles. Hence, to increase the hold-in torque, it is necessary to __________.Not learned 557. The torque-speed and current-speed curves for a three-phase induction motor with a squirrel-cage rotor are shown in figures "A" and "B" of the illustration. Which of the following statements is true concerning the depicted curvesNot learned 558. What will be the total current in figure "B" of the illustrated circuit with the switch closed if the applied voltage is 24 volts and the resistance of R is 3 ohms, R is 4 ohms, and R is 5 ohms, respectivelyNot learned 559. What is the total resistance of the electrical circuit illustrated in figure "B" if the resistance of R1 is 2 ohms, R2 is 4 ohms, and R3 is 4 ohms and the battery voltage is 6 voltsNot learned 560. The transformer diagram shown in figure "B" of the illustration represents what type of transformerNot learned 561. The turns ratio of the tapped step-down transformer shown in figure "C" of the illustration is four to one and all taps are equally spaced. If 440-volts were applied between "H1" and "H4", what would appear across "X1" and "X4"Not learned 562. The turns ratio of the tapped step-down transformer shown in figure "C" of the illustration is four to one and all taps are evenly spaced. If 120 volts were applied to terminals "H1" and "H3", what would appear at "X1" and "X2"Not learned 563. What type of electric propulsion system converter is shown in the illustrationNot learned 564. What type of electrical diagram for the autotransformer type motor controller is shown in the illustrationNot learned 565. What type of electrical diagram for the electrical distribution system is shown in the illustrationNot learned 566. What type of electrical diagram for the shunt wound DC motor is shown in the illustrationNot learned 567. What type of electrical diagram for the steering control systems is shown in the illustrationNot learned 568. What type of equipment does the wiring diagram shown in the illustration representNot learned 569. What type of motor is used in the AC hoist controller as shown in the illustrationNot learned 570. In a typical fire detection control unit, what would be indicated by an illuminated yellow light?Not learned 571. Using the temperature correction factor for the winding insulation temperature graph shown in the illustration, what would be the correction factor and the corrected temperature to 40 degrees C for a motor with an insulation resistance of 4 megohms measured at 50 degrees CNot learned 572. When using the test set-up shown in figure "A" of the illustration, besides the motor windings and the motor feeder cable, what circuit components are actually being meggeredNot learned 573. Using the trouble analysis chart and faults table provided in the illustration, if the gyrocompass was malfunctioning, but no fault codes are present on the display unit, what is most likely the problem if the DC/DC converter LED status indicator is functioning properly, but the CPU LED status indicator is not blinkingNot learned 574. If the voltage and the current developed in an AC circuit reach their peak values at the same time (with a phase angle difference of zero), how would the power factor be characterized?Not learned 575. Which of the wave shapes shown in the illustration is termed a sinusoidal waveNot learned 576. The winch shown in the illustration operates in any of the positions with the master switch in the 'lower' direction, but will not 'hoist' in any of the master switch hoist speed positions. Which of the listed faults could be the causeNot learned 577. The winch shown in the illustration operates in any of the positions with the master switch in the 'lower' direction, but will not 'hoist' in any of the master switch hoist speed positions. Which of the listed faults would MOST likely be the causeNot learned 578. The wiring diagram found in figure "B" of the illustration represents what type of DC motorNot learned 579. The wiring diagram found in figure "C" of the illustration represents what type of DC motorNot learned 580. Within the split phase family of single phase motors, what are the operational characteristics of the motor shown in figure "B" of the illustrationNot learned 581. Within the split-phase family of single-phase motors, what are the operational characteristics of the motor shown in figure "A" of the illustrationNot learned 582. What would be the actual rotor speed for a 4-pole three-phase squirrel-cage induction motor operating at 60 Hz if the rotor slip is 3%?Not learned 583. What would be the synchronous speed of an eight-pole three-phase squirrel-cage induction motor operating at 60 Hz?Not learned 584. What would be the total current draw of the circuit as shown in figure "A" of the illustration if the source voltage is 24 volts, the resistance for R1 is 12 ohms, the resistance for R2 is 24 ohms, and the resistance for R3 is 36 ohmsNot learned 585. What would be the total current in figure "A" of the circuit illustrated if the value of capacitor C1 was 100 microfarads, capacitor C2 was 200 microfarads, and the power supply was 240 volts at 60 HzNot learned 586. What would be the total power consumed by the circuit as shown in figure "B" of the illustration if the source voltage is 12 volts, the resistance for R1 is 470 ohms, the resistance of R2 is 800 ohms, and the resistance of R3 is 330 ohmsNot learned 587. What would be the total power consumed by the circuit as shown in figure "A" of the illustration if the source voltage is 12 volts, the resistance for R1 is 470 ohms, the resistance of R2 is 330 ohms, and the resistance of R3 is 800 ohmsNot learned 588. What would be the voltage drop across the series string of the circuit shown in figure "A" of the illustration if the source voltage is 30 volts, the resistance for R1 is 10 ohms, the resistance for R2 is 10 ohms and the resistance for R3 is 10 ohmsNot learned 589. Which of the following statements is correct for the illustrated circuit in figure "B"Not learned 590. What is the nominal output voltage of a 6-cell lead-acid battery?Not learned 591. What statement is true concerning the electrical diagram shown in figure "B" of the illustrationNot learned 592. When configuring a digital multimeter as an ohmmeter, what will MOST likely be displayed on the screen when the test leads are shorted together?Not learned 593. In comparing a semiconductor diode to a vacuum tube diode, what statement is true?Not learned 594. Which of the illustrated motors has an open, drip-proof (ODP) motor enclosureNot learned 595. What would be the voltage drop across the parallel branches of the circuit shown in figure "B" of the illustration if the source voltage is 30 volts, the resistance for R1 is 10 ohms, the resistance for R2 is 10 ohms and the resistance for R3 is 10 ohmsNot learned 596. If a digital multimeter is set up as shown in figures "A" and "B" of the illustration, what is the status of the silicon diode if the display reads 5 megohms when configured as in figure "A" and the display reads infinite (OL) megohms when configured as in figure "B"Not learned 597. Four incandescent lamps are connected in parallel in a single circuit. If one of the lamp filaments burns out, what will happen to the other lamps?Not learned 598. Referring to figure "4" of the illustration, what type of logic gate is symbolizedNot learned