Q602 - Motor Plants, USCG prep certification 2026

Progress: 24% (23/94)

Learning progress ?

1. Before any work is done on a burner in an automatically fired auxiliary boiler, you should always __________.Not learned 2. A safety valve on an auxiliary boiler simmers constantly and cannot be stopped by several quick blow-offs using the hand-relieving gear. The problem may be __________.Not learned 3. If the bowl of a disk-type centrifugal purifier when operated as a separator is not primed, the __________.Not learned 4. Poor combustion in a diesel engine can be caused by __________.Not learned 5. On a diesel-propelled vessel operating with constant slip what is the effect on fuel consumption with an increase in shaft RPM?Not learned 6. Which of the following statements concerning the factors affecting ignition delay is correct?Not learned 7. For a given fuel, a change in the compression ratio will affect the ignition lag by which of the listed means?Not learned 8. The pressure in an operating diesel engine cylinder continues to rise for a short period after the piston passes top dead center as a result of the __________.Not learned 9. The purpose of an oil mist detector in a main propulsion diesel engine is to warn of __________.Not learned 10. If a crankcase explosion due to a hot spot were to occur, the size of the explosion is dependent on which of the following?Not learned 11. Which of the following is one of the ways to prevent a scavenging fire on a slow-speed diesel engine?Not learned 12. Which of the following would indicate a scavenging air fire in a slow-speed diesel engine?Not learned 13. Why are some diesel engine cylinder liners plated on the wearing surface with porous chromium?Not learned 14. Mechanical lubricators for diesel engine cylinders are usually small reciprocating pumps which are __________.Not learned 15. The rate of cylinder lubricating oil metered to each cylinder of a large, low-speed, main propulsion diesel engine is __________.Not learned 16. Which statement about diesel engine combustion is true?Not learned 17. In an auxiliary diesel engine, one reason for knurling the piston skirt is to __________.Not learned 18. According to the illustration, which of the following is trueNot learned 19. In an internal combustion engine, which of the devices listed will force the compression rings to seal the compression gases in the space above the piston?Not learned 20. Low compression pressure in a diesel engine can be caused by __________.Not learned 21. One method of determining crankshaft misalignment is by __________.Not learned 22. High-speed, multi-cylinder, diesel engines commonly use counterweights placed opposite to the crankpins to __________.Not learned 23. A bronze bearing liner with a lead-tin flashing has a milky-white color over most of its surface and some areas of exposed bronze. The white coloring indicates __________.Not learned 24. The valve cam slope angle determines the __________.Not learned 25. The intake and exhaust valves used in a diesel engine are returned to their seats by __________.Not learned 26. If there is a 'clicking' sound in the valve compartment of a diesel engine, the cause may be __________.Not learned 27. Excessively worn, or polished ends on a diesel engine valve spring, indicate __________.Not learned 28. Bouncing of the valve gear in a diesel engine can be caused by __________.Not learned 29. In a four-stroke cycle diesel engine, badly worn intake valve guides can cause excessive __________.Not learned 30. In diesel engines, hydraulic valve lifters are used to __________.Not learned 31. Decreasing the exhaust valve clearance of a diesel engine will cause the exhaust valve to open __________.Not learned 32. The direct acting mechanical governor used with some small diesel engines, controls fuel flow to the engine by __________.Not learned 33. In the illustrated auxiliary diesel engine governor, decreasing the distance between piece 6 and piece 10 will affect the engine by __________Not learned 34. A large change in ambient temperature or using an oil of a viscosity different than the one recommended by the manufacturer in a mechanical hydraulic governor, will result in the need to adjust the __________.Not learned 35. The purpose of the compensating adjustment used in a diesel engine hydraulic governor is to __________.Not learned 36. If the compensating needle valve of a hydraulic governor is opened more than necessary the governor will __________.Not learned 37. If the speeder spring of a main propulsion diesel engine governor breaks while operating at full load, the engine RPM will _________.Not learned 38. A diesel-generator governor is hunting. After changing the oil, the governor is flushed and the compensation needle valve is adjusted, but the hunting persists. You should NOW __________.Not learned 39. Governor hunting is caused by __________.Not learned 40. If the operating speed of a diesel engine increases without an apparent change in the engine control settings, you may suspect a __________.Not learned 41. The device shown in the illustration is used to secure the air supply to a diesel engine when the engine overspeeds. In order for this to occur, supplied oil pressure must __________Not learned 42. An engine is equipped with the overspeed trip similar to that shown in the illustration. The throw out weight is designed to run at 900 RPM and trip out at 10% overspeed. However, the overspeed trip is currently activating at 930 RPM. In order to correct this problem, __________Not learned 43. A diesel engine overspeeds and fails to restart when cranked at normal speed. Which of the following problems is the most likely cause for the engine failing to restart?Not learned 44. In accordance with 46 CFR Subchapter F, diesel fuel oil system valves for removing water or impurities are __________.Not learned 45. Problems with the diesel engine fuel injection pump are usually caused by __________.Not learned 46. Which of the following problems is the main source of fuel pump and injection system malfunctions?Not learned 47. Differential needle valves used in fuel injectors are directly closed by __________.Not learned 48. Carbon deposit build up on the injection nozzle orifice is least likely to occur when using which type of fuel injector nozzle?Not learned 49. The amount of fuel delivered by a unit injector is controlled by the __________.Not learned 50. You are testing a closed fuel injection nozzle using a nozzle tester. A pressure slightly less than design valve opening pressure is applied. If no fuel appears at the spray tip, the __________.Not learned 51. Faulty operation of diesel engine fuel injection nozzles can be a direct result of __________.Not learned 52. When a fuel injection nozzle overheats, which of the problems listed can be expected?Not learned 53. When disassembling or assembling an injection pump plunger and barrel you should _________.Not learned 54. Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires __________.Not learned 55. Uneven bolt tightening during the installation of a fuel injection pump can result in __________.Not learned 56. High cylinder firing pressure, accompanied by low exhaust temperature, can result from __________.Not learned 57. High firing pressures and a low exhaust temperature in a diesel engine may result from __________.Not learned 58. One remedy for a high firing pressure, in addition to a high exhaust temperature in one cylinder of a diesel engine, is to __________.Not learned 59. The adverse effects of burning high sulfur fuel can be compensated for by using a cylinder oil having sufficient __________.Not learned 60. A 'Blotter test' is a test performed on the lube oil of a diesel engine which can determine ______.Not learned 61. Oil oxidation, as a result of excessively high lube oil temperature, is harmful to a diesel engine because __________.Not learned 62. If the analysis of used lube oil indicates a high content of iron particles, this could indicate __________.Not learned 63. A decrease in the flash point of diesel engine lube oil indicates the lube oil has become __________.Not learned 64. Lube oil in the fresh water cooling system of a diesel engine may result from a __________.Not learned 65. A dirty lube oil strainer can result in __________.Not learned 66. When tightening the lock ring "G" of the device shown in the illustration, two events are simultaneously accomplished. Which of the following statements represents these eventsNot learned 67. From the graph shown in the illustration, if the separating temperature required is to be 167°F, and the specific gravity of the oil is 0.98 kg/dm3 at 59°F, what size regulating ring is requiredNot learned 68. Which of the following conditions would be the most probable cause for the 'low oil temperature after preheater' LED indicators, as shown in the illustration, to be illuminatedNot learned 69. Clearance volume scavenging in a turbocharged, four-stroke cycle diesel engine is accomplished __________.Not learned 70. In a two-stroke cycle diesel engine, a Roots-type blower is usually __________.Not learned 71. During the valve overlap period, the exhaust pressure of a turbo-charged, four-stroke cycle diesel engine must be less than the intake manifold pressure to ensure __________.Not learned 72. In a turbocharger, inlet air velocity is increased in the __________.Not learned 73. Which of the following precautions should be taken when cleaning the air filter on a diesel engine equipped with a turbocharger?Not learned 74. Following the failure of one turbocharger on a large, crosshead, main propulsion diesel engine, fitted with multiple turbochargers, which of the following actions should be taken prior to further operation of the engine?Not learned 75. An operating diesel engine that suddenly loses power, is due to a/an __________.Not learned 76. A sudden power loss from a turbocharged and aftercooled diesel engine is an indication of a/an __________.Not learned 77. Oil accumulating in the exhaust piping or manifold of a diesel engine can be caused by __________.Not learned 78. High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by __________.Not learned 79. The gauge glass on a coil-type auxiliary boiler is connected to the __________.Not learned 80. Heavy soot accumulations in an auxiliary boiler could be caused by __________.Not learned 81. A feed pump for an auxiliary boiler might lose suction if the __________.Not learned 82. If a tube ruptures in a water-tube auxiliary boiler due to low water, you should ___________.Not learned 83. Which of the listed problems will happen when the water level of a fire-tube type auxiliary boiler approaches the crown sheet?Not learned 84. Why should the main steam stop valve of an auxiliary boiler be eased off its seat and then gently closed before lighting off?Not learned 85. A burner producing black smoke in an automatic auxiliary boiler, would be caused by a/an __________.Not learned 86. The primary function of a flame safeguard system, as used on an automatically fired auxiliary boiler, is to prevent what condition?Not learned 87. During unsafe firing conditions in a large automatic auxiliary boiler, various control actuators are interlocked with the burner circuit to prevent start-up, in addition to safety shutdown. These controls are referred to as __________.Not learned 88. Which of the automatic boiler controls listed should be tested prior to lighting off an auxiliary boiler?Not learned 89. Burner ignition failure in an automatically fired auxiliary boiler would be caused by __________.Not learned 90. Which of the types of reduction gearing listed is best suited for medium-speed main propulsion units?Not learned 91. When an additional load is applied to a diesel engine which is using an inadequately inflated air bladder clutch unit, you can expect __________.Not learned 92. The reversing cams of some four-stroke cycle diesel engines are brought into position by __________.Not learned 93. A diesel engine may fail to start when being cranked, due to __________.Not learned 94. Which of the following statements is true concerning the air starting valve, labeled "III", as shown in the illustrationNot learned 95. In a medium-speed marine propulsion engine equipped with direct admission air starting valves, the cylinders without air starting valves fire first because the __________.Not learned 96. Intercoolers installed on starting air compressors, reduce the possibility of __________.Not learned 97. When an engine fitted with a hydraulic starting system starts up, the starter is protected from the higher speed of the engine by ________.Not learned 98. Before any auxiliary diesel engine hydraulic starting system is opened for servicing or repair, you must __________.Not learned 99. The pinion of an auxiliary diesel-electric starting motor normally engages the flywheel ring gear by means of a/an __________.Not learned 100. In a Bendix starter drive, the pinion engagement with the flywheel ring gear is initiated by __________.Not learned 101. Which of the following operating characteristics of the Bendix drive friction clutch is associated with a Bendix drive starter?Not learned 102. Which of the following effects will excessively cold lube oil have on the operation of a diesel engine?Not learned 103. If an auxiliary diesel engine equipped with an electric starting system cranks very slowly after repeated attempts to start, the cause could be a/an __________.Not learned 104. On small diesel engines, a noticeable decrease in the time interval between the replacement of the lube filter cartridge indicates __________.Not learned 105. During main engine performance testing it is noticed that the firing pressure of one cylinder is higher than the average, but cylinder compression pressure is normal. Which of the following would most likely be the cause?Not learned 106. During main engine performance testing it is noticed that one cylinder has firing and compression pressures lower than average. Which of the following would most likely be the cause?Not learned 107. In accordance with 46 CFR Subchapter J, which of the listed starting aids is acceptable for use with the emergency diesel-generator?Not learned 108. According to the illustration, initial timing of fuel injection into the cylinder is controlled with the component that is identified as the letter _________Not learned 109. When analyzing indicator card diagrams you are calculating the work output from the cylinder by obtaining the area within the curve of what type of diagram?Not learned 110. The area indicated by the letter "W", shown in the illustration is correctly termed the __________Not learned 111. In the auxiliary diesel engine, shown in the illustration, the __________Not learned 112. While bunkering heavy fuel, what quick/easy test can one perform onboard to determine the compatibility of 'old' with 'new' fuel?Not learned 113. Catalytic fines comprised of aluminum oxide and/or silicon dioxide are a common contaminant of residual fuels. Which diesel engine components would be most affected by catalytic fines in fuel?Not learned 114. When changing over from residual to distillate fuel on a slow-speed diesel main engine, what is a good guideline to follow regarding the change over?Not learned 115. When changing over from residual to distillate fuel on a slow-speed diesel propelled vessel, you should limit the rate of temperature change of the fuel in order to prevent what operational difficulty?Not learned 116. As Chief Engineer of a slow-speed diesel engine vessel equipped with an ALCAP fuel oil purification system. You note a definite increase in the rate at which the purifier sludge tank is rising. One of the first items to check on your system would be which of the following?Not learned 117. The most common contaminate of governor hydraulic fluid is __________.Not learned 118. In the common rail system, excessive pressure in the header may be caused by __________.Not learned 119. The component labeled "A" on the engine reversing device shown in the illustration, performs its function by transmitting _______Not learned 120. The component labeled as part #20 in the illustration is used to __________Not learned 121. Which construction detail is apparent in the connecting rod and piston assembly shown in the illustrationNot learned 122. Crankcase explosions in propulsion diesel engines can result from which of the following?Not learned 123. The cylinders labeled "B" and "C" in the illustration are used to __________Not learned 124. The device shown in the illustration is classified as a/an __________Not learned 125. In the device shown in the illustration, the component lettered "A" is the __________Not learned 126. The diesel engine shown in the illustration is provided with an auxiliary blower to __________Not learned 127. The diesel engine shown in the illustration utilizes the type of cylinder construction identified as __________Not learned 128. In a direct cylinder admission air starting system, once the engine begins to fire, the air starting check valve illustrated, is closed by __________Not learned 129. As an engineer of a slow-speed diesel powered vessel, you note that the indicator card diagrams have a flat horizontal profile around TDC. To rectify this, what would be your best course of action?Not learned 130. When entering a ECA, when should you begin the changeover to low sulphur fuel on a slow-speed diesel vessel?Not learned 131. Evidence of low temperature corrosion is observed on the combustion space components of a slow- speed diesel engine. What causes this corrosion and what can one do to mitigate this situation?Not learned 132. While examining a used fuel injection nozzle(s), one finds worn and enlarged orifices. What does this indicate about that cylinder's performance prior to nozzle replacement(s)?Not learned 133. Excessive wear at part No.11, shown in the illustration would result in __________Not learned 134. Exhaust valve timing for the engine, shown in the illustration, is to be set at 106° after top dead center. To what position should the flywheel be rotated to set the exhaust valve timing on the No.11 cylinderNot learned 135. In what figure of the illustration does the crosshead experience the greatest side thrustNot learned 136. Which of the following precautions should be taken prior to starting the separator shown in the illustrationNot learned 137. Which of the following statements is accurate concerning the vibration sensing device used with the separator shown in the illustrationNot learned 138. Which of the following statements is correct concerning the connecting rod and piston assembly shown in the illustrationNot learned 139. Which of the following statements describes the function of the device labeled "C" shown in the illustrationNot learned 140. Which of the following statements describes what will occur if the annular spaces, indicated by the letter "K" of the device shown in the illustration, became restrictedNot learned 141. A four-stroke cycle auxiliary diesel engine fuel cam has shifted from its original position during maintenance. To ensure correct timing of the fuel pump, the intake and exhaust valves should be in what position when approaching top dead center for injection?Not learned 142. Which fuel chemical elemental constituents contribute to hot and cold temperature corrosion of combustion space surfaces and components of a diesel engine?Not learned 143. When a fuel injection nozzle overheats, which of the problems listed can be expected?Not learned 144. The governor for an emergency diesel generator is shown in the illustration. When a large change in load results in a change in engine speed, which of the parts listed will be the FIRST governor component to react to the change in loadNot learned 145. The governor utilized with the device shown in the illustration has become inoperative while the vessel is underway at sea. Which of the following statements describes what action should be takenNot learned 146. From the graph shown in the illustration, determine the size of the regulating ring required for the proper operation of the fuel oil centrifuge if the fuel oil specific gravity is 0.9 kg/dm3 at 68°F, and the separating temperature is 158°FNot learned 147. The illustrated device is used to __________Not learned 148. The illustration shown describes a _______Not learned 149. In the illustration shown, moving the component labeled "E", further to the left, will result in __________Not learned 150. Increasing the oil pressure acting on the power piston of the hydraulic governor shown in the illustration will __________Not learned 151. The indicated position of the fuel injection pump plunger as shown in the illustration, will provide fuel delivery to the diesel engine in an amount approximately equal to __________Not learned 152. When inspecting the valve mechanism shown in the illustration, normal maintenance would include __________Not learned 153. Item #16 of the piston shown in the illustration is a/an __________Not learned 154. If item "F" begins leaking during operation, which of the following operating conditions will NOT occurNot learned 155. In the large slow-speed main propulsion diesel engine shown in the illustration, the part labeled "G" is the __________Not learned 156. A main propulsion diesel engine crankshaft bearing lacking sufficient 'crush', will __________.Not learned 157. What is a major initial ramification of receiving bunkers with a water content of 0.75% by volume?Not learned 158. What is the maximum allowable clearance permitted between the bearing, shown in the illustration and the shaft along its vertical axisNot learned 159. How may water be removed from the bowl of the separator as shown in the illustrationNot learned 160. All modern medium and slow speed diesel engines have components assembled via bolts that are tensioned hydraulically, both for removal and reassembly. When using such hydraulic devices, to what metallurgical state are you subjecting such bolts?Not learned 161. A motor vessel has three centrifuges to pre-treat the fuel which can be configured to operate in series, parallel, and series-parallel. A large quantity of water is determined to be present in the fuel. How would you configure the centrifuges to deal with this problem?Not learned 162. You notice that the fuel oil sludge tank level is increasing at a higher than normal daily rate. The main engine fuel oil leakage tank has a normal level. What would you consider your first action to be?Not learned 163. One experiences evidence of high temperature corrosion on diesel engine combustion space components. This is exhibited by 'wire drawing' marks on exhaust valves/seats or metal reduction on cylinder heads. What causes this degradation of components?Not learned 164. The Fairbanks Morse part labeled "G", as shown in the illustration, is a __________Not learned 165. A photoelectric cell installed in an automatically fired auxiliary boiler burner management system __________.Not learned 166. What physical property of low sulfur distillate fuel can result in operational difficulties?Not learned 167. The pinion gear shown in the illustration, is located __________Not learned 168. Piston rings are replaced on the cylinder unit of a medium or slow speed diesel engine. All measurements of the cylinder liner and piston are within limits, as is condition of intake/exhaust valves. What is the end result of the ring replacement?Not learned 169. The pneumatic circuit shown in the illustration is part of a complex large low-speed engine control system. Which of the following statements describes the function of this circuitNot learned 170. In pre-treating fuel oil on a motor vessel, what would you consider the most important factor to prevent high temperature corrosion on an engine's combustion components?Not learned 171. When reassembling the bowl of the centrifuge, shown in the illustration, the alignment mark on the locking ring passes the bowl cover mark in excess of the manufacturer's specifications. This is due to __________Not learned 172. Regarding the fuel injector shown in the illustration, the purpose of piece #38 is to __________Not learned 173. Regularly taken indicator cards on a slow-speed diesel engine provides relative engine performance data allowing engineers to compare to previous data and manufacturer's design. What are the two most important parameters obtained from reading the indicator cards?Not learned 174. In the reversing reduction gear shown in the illustration, the forward and reverse main pinions are in constant mesh with the main gear. This means the __________Not learned 175. If a scavenging air space fire occurs on a slow-speed diesel engine and the engine is stopped, which of the following should be done to prevent distortion due to heat?Not learned 176. A schematic diagram of an isochronous hydraulic governor is shown in the illustration. When the load is removed the speed increases, and the __________Not learned 177. If the separating temperature is to remain constant, what is the relationship between the specific gravity of the oil and the required size of the regulating ringNot learned 178. As shown in the illustration, which of the following conditions would be responsible for a "low-pressure in oil outlet" alarm to be indicatedNot learned 179. As shown in the illustration of the fuel injection pump, the function of the area designated as "L" is to __________Not learned 180. As shown in the illustration of the fuel injection pump, the section designated as "M" is referred to as the __________Not learned 181. On a slow-speed diesel engine vessel you are supervising a routine piston pull on a cylinder with 10000 hours on the liner. The piston rod is disconnected. Why must the ridge on the liner be removed before lifting the piston?Not learned 182. If the speed of the propeller is 135 RPM, the speed of the engine camshaft shown in the illustration will be __________Not learned 183. The starter control valve in the hydraulic system shown in the illustration is malfunctioning. Before removing the valve, you must first __________Not learned 184. After testing your medium-speed engine's exhaust valve springs you find one with a spring constant that is lower than specified by design and a length that is reduced in length from that specified by design. What is the recommended course of action?Not learned 185. While travelling in the tropics, the condensate draining from charge air receiver drain is flowing even though you have raised the inlet temperature to the allowable limit. What effect does excessive moisture have on the engine?Not learned 186. Which type of diesel engine fuel nozzle is shown in the illustrationNot learned 187. While underway, a slow-speed diesel engine lube oil sump level slowly begins to decrease. Which of the following should be checked?Not learned 188. If a valve seat insert, similar to that shown in the illustration is cracked, this may be indicated by __________Not learned 189. The vessel's owners have issued orders to reduce a motor vessel's speed to achieve a 10% reduction of fuel, for an extended period of time. As the senior engineer on board, what action should you take?Not learned 190. According to the illustration, fuel cutoff timing in the cylinder is controlled with the component that is identified as the letter _________Not learned 191. Crankcase explosions in propulsion diesel engines result from __________.Not learned