Q654 - Electrical, Electronic, & Control Engineering, USCG prep certification 2026

Progress: 24% (23/94)

Learning progress ?

1. Why are nickel-cadmium batteries superior to lead-acid batteries for standby service?Not learned 2. 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 3. When the control handle is in the "off" position, what is the status of the solenoid actuated brake of an electric winch?Not learned 4. 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 5. In an impressed current cathodic hull protection system, what statement is true concerning the composition and arrangement of the anodes?Not learned 6. 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 7. Before any work on electrical or electronic equipment is performed, which of the following precautions should be carried out?Not learned 8. Which of the following fixed temperature heat-actuated fire detectors can be reused after it has detected a fire?Not learned 9. Which of the following fixed temperature heat-actuated fire detectors is the most prone to false alarms?Not learned 10. 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 11. How may the unit "hertz" be best described?Not learned 12. When placed in a magnetic field, which of the materials listed has the highest permeability?Not learned 13. 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 14. In a 60 Hz AC system, what is the duration in seconds for one complete cycle?Not learned 15. The multiplier prefix "giga" (G) such as used in "gigabytes" represents what multiplication factor?Not learned 16. Before working on an electric cargo winch master switch or controller, what should be done?Not learned 17. 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 18. 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 19. 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 20. Which of the following voltage testers would be associated with high quality, be safe to use, and minimize the electric shock hazard?Not learned 21. Which of the substances listed can be used to shield sensitive equipment from static magnetic fields?Not learned 22. How are the line losses in a distribution circuit kept to a minimum?Not learned 23. In a series circuit, what is the applied voltage (or sum of the applied voltages) equal to?Not learned 24. Three 12-volt, lead-acid, batteries connected in series will develop how many volts?Not learned 25. 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 26. Which statement is true concerning the total power consumed in a parallel circuit?Not learned 27. What is a useful instrument for checking 3-phase AC motor performance by measuring possible unbalanced currents?Not learned 28. An internal resistance is placed in series with the meter movement of which of the following instruments?Not learned 29. What practice could potentially damage a multimeter?Not learned 30. To properly use a clamp-on type ammeter to check current flow, what must be done FIRST?Not learned 31. What is the circuit shown in the illustration used to measureNot learned 32. 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 33. Why are nickel-cadmium batteries superior to lead-acid batteries for standby service?Not learned 34. What is the ampere-hour rating of a lead-acid battery that can deliver 20 amperes continuously for 10 hours?Not learned 35. According to 46 CFR Subchapter J, what is true concerning the installation of batteries used for diesel engine starting?Not learned 36. What statement is true concerning the charging of a 100 amp-hour lead-acid battery?Not learned 37. Which of the substances listed should be applied to battery terminals to help prevent corrosion?Not learned 38. 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 39. Which of the following activities occurs during the charging process of a lead-acid storage battery?Not learned 40. To keep emergency lead-acid batteries in a full state of charge for emergency use, what is normally done?Not learned 41. The nominal voltage of one cell of a wet cell nickel-cadmium battery is approximately how many volts?Not learned 42. What is the best method of determining the state of charge of a flooded lead-acid storage battery?Not learned 43. 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 44. How can the loss of residual magnetism in an alternator with a brushless excitation system be corrected?Not learned 45. 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 46. How can the direction of rotation of a DC motor be reversed?Not learned 47. What type of motor is generally used in DC propulsion drive systems?Not learned 48. 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 49. When a transformer is used to step down voltage, what statement is true?Not learned 50. What is the purpose of a potential transformer in an electric circuit?Not learned 51. Which of the following statements about a three-phase wye connected alternator is correct?Not learned 52. 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 53. How are AC and DC generators similar?Not learned 54. 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 55. 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 56. 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 57. Upon loss of field excitation of a generator operating in parallel with others, what must be done?Not learned 58. How is the difference between the synchronous speed of a three-phase induction motor and its operating speed correctly expressed?Not learned 59. What is the most practical method of controlling the RPM of a multi-speed AC motor operating at a constant frequency?Not learned 60. 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 61. 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 62. What will be the impact of reduced voltage applied to a motor during the starting period?Not learned 63. Which of the illustrated motors has an open motor enclosureNot learned 64. By what means is a synchronous motor started and brought nearly to synchronous speed?Not learned 65. Assuming that a three-phase synchronous motor is separately excited, what statement is true concerning power supplies?Not learned 66. 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 67. 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 68. What type of rotor is most commonly used in the split-phase family of single-phase induction motors?Not learned 69. A shaded-pole motor is a specific type of motor included in what class of motor?Not learned 70. Which of the listed motors will operate at the highest RPM, assuming that each operates at the same frequency?Not learned 71. Of the following, what shipboard system is MOST likely to use the synchronous transmission system featuring a transmitter and receiver?Not learned 72. 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 73. How are fuses usually rated?Not learned 74. 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 75. 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 76. What type of AC motor would use a rheostat in the rotor circuit to vary the speed of the motor?Not learned 77. What is the functional name of an electrical device which prevents simultaneous energization of loads thereby preventing damage or injury?Not learned 78. 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 79. 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 80. Why are electric strip heaters used in motor controllers?Not learned 81. When power is restored after a complete power failure, how will the steering gear pump motor which was on- line respond?Not learned 82. 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 83. 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 84. Which of the conditions listed will indicate the need to clean the insulation on the windings of an electric motor?Not learned 85. 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 86. 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 87. What would be the indication of a grounded switch or cable as measured by a megohmmeter?Not learned 88. Which of the following is the only known perfect dielectric for the purpose of serving as electrical insulation?Not learned 89. What happens to the life expectancy of insulation for each 10°C rise in operating temperature?Not learned 90. Assuming the vessel has an engine control room, where is an engineers' assistance-needed alarm required to produce an audible signal?Not learned 91. 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 92. The timer element of a reverse power relay cannot be energized unless what condition is met?Not learned 93. 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 94. 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 95. 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 96. What should be included in the routine periodic maintenance checks for electrical motors?Not learned 97. Which of the following methods should be used to dress the face of silver-plated contacts?Not learned 98. 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 99. 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 100. In a diesel-electric plant, raising the generator's field excitation current will have what effect on the DC propulsion motor speed?Not learned 101. 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 102. What is one major advantage of a diesel-electric propulsion plant?Not learned 103. How is the main shaft rotation on an AC diesel-electric propulsion vessel normally reversed?Not learned 104. Which statement is TRUE concerning electric propulsion drives?Not learned 105. 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 106. What does the symbol in figure "1" shown in the illustration representNot learned 107. Which of the following statements correctly applies to bipolar junction transistors?Not learned 108. 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 109. A signal derived from a device output and returned to the device input is called what type of signal?Not learned 110. A voltage amplifier has a calculated voltage gain of 5. Which statement is true concerning input and output voltages?Not learned 111. How are operational amplifiers, used primarily in analog circuits, characterized?Not learned 112. As shown in all four diagrams included in the illustration, what type of logic circuit is representedNot learned 113. A bearing temperature monitoring system such as that used for measuring selected propulsion plant bearings uses what technology?Not learned 114. What is an ammeter used to measure?Not learned 115. In what applications are semiconductor diodes commonly used?Not learned 116. The arc resulting from the tripping of a circuit breaker is prevented from damaging the contacts. How is this done?Not learned 117. Assuming a 120 VAC input across TP1 and TP2 and a regulated output of 24 VDC across TP5 and ground, in which section of the 24 VDC power supply circuit illustrated does the greatest absolute change in voltage level take placeNot learned 118. What is the basic similarity between a circuit breaker and a fuse?Not learned 119. 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 120. Why should battery rooms be well ventilated during the charging of lead-acid storage batteries?Not learned 121. What can be the cause of excessive heat or burning contacts in an operating motor controller?Not learned 122. By what common means is the speed of an AC propulsion motor on a diesel-electric propulsion ship controlled?Not learned 123. 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 124. The component labeled "CR1" in the circuit shown in the illustration serves what functional purposeNot learned 125. 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 126. In consideration of what a wattmeter is designed to measure, how would a wattmeter be electrically connected in a circuit?Not learned 127. 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 128. In the diagram of the switchboard shown in the illustration, what is the purpose of the current transformersNot learned 129. If a digital multimeter set up to measure AC volts reads low value, but constantly changing "ghost voltages" when its leads are disconnected, what does this indicate?Not learned 130. 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 131. In which of the following branch circuits types would time lag fuses (or dual-element fuses) be MOST likely used?Not learned 132. Which of the following illustrated manual motor starters represents the wiring diagram illustrated in figure "A"Not learned 133. Which of the following motors has a frame configuration for solid base mounting onlyNot learned 134. Which of the following pictures represents a magnetic reversing or two-speed motor starterNot learned 135. Which of the following procedures represents the best method to prevent the freezing of lead-acid batteries continuously exposed to low temperatures?Not learned 136. 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 137. What is the functional purpose of a generic electromagnetic relay?Not learned 138. What is the functional purpose of the "MS 2" contacts in the hoist controller circuit shown in the illustrationNot learned 139. 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 140. 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 141. The individual 12-volt lead-acid batteries, when connected as shown in the illustration, as a battery bank would produce how many voltsNot learned 142. From the information given in the illustration, which of the following statements is correctNot learned 143. 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 144. Which line in figure "B" shown in the illustration represents the trailing edge of the waveNot learned 145. Which of the listed conditions occur when selection is made for "third point hoist" on the winch hoist controller shown in the illustrationNot learned 146. How is the main propeller shaft rotation of a rectified DC diesel-electric drive normally reversed?Not learned 147. What may happen if the CAPAC system is not turned on when underway?Not learned 148. What is the measure of the opposition that a magnetic circuit offers to the magnetic lines of force (flux) called?Not learned 149. Which metal is primarily used on shipboard equipment to face contacts in electrical equipment?Not learned 150. 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 151. 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 152. What is the name of the component labeled CR1 as shown in section "D" of the regulated DC power supply illustratedNot learned 153. 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 154. What is an ohmmeter used to measure?Not learned 155. What are the operating characteristics of the Ward-Leonard DC motor speed control system as shown in figure "A" of the illustrationNot learned 156. What is the operating function of a cycloconverter (CCV) as a static power converter used in electric propulsion motor drives?Not learned 157. What are the operational characteristics of the split-phase motor shown in figure "A" of the illustrationNot learned 158. Which pair of safety disconnect switches shown in the illustration represents the exterior and interior views of a double-throw switchNot learned 159. 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 160. Which of the pictured solid state semiconductor devices is a light-emitting diodeNot learned 161. How is the power dissipated as heat in a simple direct current circuit consisting of one resistive load calculated?Not learned 162. In preparing a battery-operated digital megohmmeter (resistance tester) for use, what statement is true?Not learned 163. What is the primary advantage of stranded cable over solid cable which establishes the basis for the requirement for stranded cable for shipboard applications?Not learned 164. 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 165. 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 166. 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 167. What is the purpose of a three-phase lighting power transformer bank of a shipboard distribution system?Not learned 168. 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 169. Referring to the containership one-line distribution diagram shown in the illustration, what statement is true concerning the battery chargerNot learned 170. Referring to figure "3" of the illustration, what type of logic gate is symbolizedNot learned 171. In referring to the frequency response filters shown in the illustration, what determines the band pass or band stop frequencies as appropriateNot learned 172. Referring to the illustration pertaining to an alternator protection and alarm system, what statement is true concerning the component labeled "LO"Not learned 173. 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 174. 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 175. 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 176. Referring to the illustration, what is the position of the three circuit breakers labeled in figure A, B, and C respectivelyNot learned 177. 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 178. 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 179. 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 180. The root mean square (RMS) value of a sine-wave current may also be referred to as what value?Not learned 181. 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 182. As shown in figure "A" of the illustration, what does the M-G set's three-phase drive motor mechanically driveNot learned 183. 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 184. As shown in figure "A" of the illustrated propulsion motor variable speed drive, what statement is trueNot learned 185. 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 186. 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 187. As shown in the illustrated feeder disconnect controller, what statement is trueNot learned 188. As shown in the illustrated one-line diagram of a two-tiered emergency power system for a passenger ship, what statement is trueNot learned 189. 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 190. As shown in the illustrated wound-rotor induction motor, what statement is true concerning motor lead connectionsNot learned 191. 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 192. 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 193. As shown in the illustration, how are the rotor windings (terminating as marked motor leads M1, M2, and M3) of the motor configuredNot learned 194. As shown in the illustration, the wet cell storage batteries are connected in what configurationNot learned 195. A silicon-controlled rectifier (SCR) is a solid-state device used for what functional purpose?Not learned 196. In what situation would an electrical phase sequence indicator be useful?Not learned 197. While standing an "at sea watch" onboard an AC diesel-electric drive ship with a synchronous propulsion motor with the ability to vary the field excitation strength and still remain in synchronism. Ideally what would be the character of the power factor associated with the main power distribution system including all motors?Not learned 198. 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 199. 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 200. In terms of propulsion generator type, power conditioning schemes, and propulsion motor type, what combination of equipment is included in modern AC-DC SCR rectified DC propulsion drive systems?Not learned 201. 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 202. 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 rotation assuming that the stop button is depressed firstNot learned 203. 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 204. 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 205. The transformer diagram shown in figure "B" of the illustration represents what type of transformerNot learned 206. What type of motor is used in the AC hoist controller as shown in the illustrationNot learned 207. In a typical fire detection control unit, what would be indicated by an illuminated yellow light?Not learned 208. 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 209. 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 210. Which of the wave shapes shown in the illustration is termed a sinusoidal waveNot learned 211. Which of the following statements is correct for the illustrated circuit in figure "B"Not learned 212. What is the ampere-hour rating of a lead-acid battery rated for a 20 hour capacity that can deliver 10 amperes continuously for 20 hours without dropping below 90% of its rated terminal voltage?Not learned 213. What is the nominal output voltage of a 6-cell lead-acid battery?Not learned 214. 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 215. Which of the following statements concerning analog and digital electronic system signals is correct?Not learned 216. Which of the illustrated motors has an open, drip-proof (ODP) motor enclosureNot learned 217. In a typical fire detection control unit, what would be indicated by an illuminated blue light?Not learned 218. 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 219. Referring to figure "4" of the illustration, what type of logic gate is symbolizedNot learned