Q610 - Motor Plants, USCG prep certification 2026

Progress: 24% (23/94)

Learning progress ?

1. The device shown in the illustration is a __________Not learned 2. At a given pressure, erosion of steam piping and machinery will be minimized by utilizing __________.Not learned 3. A variable capacity, pressure atomizing, fuel oil burner functions to __________.Not learned 4. Which of the following statements describes how the fuel oil enters the whirling chambers of the sprayer plates used in an auxiliary boiler return flow fuel oil system?Not learned 5. The theoretical minimum compression ratio necessary to ensure compression ignition in a direct injection diesel engine is __________.Not learned 6. Opposed-piston diesel engines are classified as __________.Not learned 7. Diesel engines are classified as reciprocating internal combustion engines because they __________.Not learned 8. The diesel engine shown in the illustration is a __________Not learned 9. The minimum fuel oil delivery pressure required for efficient injection depends primarily on the __________.Not learned 10. Which of the air intake systems listed will result in the lowest specific fuel consumption?Not learned 11. When is fuel injected into a cylinder of diesel engines?Not learned 12. Which area of the indicator diagram illustrated indicates the ignition delay period in a diesel engine cylinderNot learned 13. The rate of pressure rise during the period following fuel ignition in a diesel engine is influenced by the length of the ignition delay period. What else will influence the pressure rise?Not learned 14. 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 15. One method of constructing large marine diesel engines and reducing the total engine frame weight is through __________.Not learned 16. A diesel engine crankcase ventilation system __________.Not learned 17. In a modern internal combustion diesel engine, the load carrying part of the engine is referred to as the __________.Not learned 18. Integral cylinder liners constructed as part of the cylinder block, are characterized by which of the following disadvantages?Not learned 19. Mechanical lubricators for diesel engine cylinders are usually small reciprocating pumps which are __________.Not learned 20. What may cause a diesel engine cylinder head to crack?Not learned 21. Open combustion chambers are designed to __________.Not learned 22. The purpose of the energy cell, or air cell, is to __________.Not learned 23. The service life of a worn aluminum piston for an auxiliary diesel, for which no spares are readily available, can be extended by __________.Not learned 24. The insertion of shims between the foot of a marine type connecting rod and a bearing box would result in __________.Not learned 25. The small end of the connecting rod is attached to the piston with a __________.Not learned 26. Connecting rods in a diesel engine are used to connect the ________.Not learned 27. The linear motion of a diesel engine piston is converted into the rotary motion required to drive gears, propeller shafts, and generators by the __________.Not learned 28. Which of the components listed is only found in an opposed-piston engine?Not learned 29. Bearing "crush" as applied to diesel engine main bearings, will result in __________.Not learned 30. A characteristic of a bearing material which permits small dirt particles to become embedded in the bearing surface is __________.Not learned 31. The load is always placed on the lower half of the main bearings in a __________.Not learned 32. The use of push rods becomes necessary in a diesel engine when __________.Not learned 33. In comparison to exhaust valves, intake valves of diesel engines may be fabricated from low-alloy steels because __________.Not learned 34. The valve stem expansion associated with engine warm-up is allowed for by the __________.Not learned 35. Sensitivity for a diesel engine governor is described as the __________.Not learned 36. The principal characteristic of an isochronous governor is it will __________.Not learned 37. The direct acting mechanical governor used with some small diesel engines, controls fuel flow to the engine by __________.Not learned 38. The overspeeding of the diesel engine driving an electric generator could cause __________.Not learned 39. A main propulsion diesel engine is normally shutdown by __________.Not learned 40. Which of the following statements is true concerning the cetane number of diesel fuel?Not learned 41. A mixture of 45% cetane and 55% alpha-methyl-naphthalene is found to have the same ignition delay as a sample of diesel oil. The sample can be described as having a/an __________.Not learned 42. Fuels as produced in a refinery are generally sterile; however, contamination can occur as fuels are __________.Not learned 43. The microbiological growths that affect fuel supplies can easily be transported from one location to another by __________.Not learned 44. Proper housekeeping to prevent the formation of microbiological growths within a fuel system includes the prevention of water accumulations and the use of __________.Not learned 45. In the illustration shown, under what conditions would valves "2" and "3" be closed and valve "6" be openedNot learned 46. To minimize corrosion, what are fuel oil strainer disks, spacers and scraper blades made of?Not learned 47. What is the primary purpose of a fuel injection system, besides metering and atomizing fuel?Not learned 48. An immediate repair is required if a leak occurs in the high-pressure fuel piping between the injection pump and fuel nozzle because of the __________.Not learned 49. Differential needle valves used in fuel injectors are directly closed by __________.Not learned 50. What effect does proper atomization of fuel have in a diesel engine combustion chamber?Not learned 51. Fuel injector nozzles are usually of the multi-orifice type with the number and placement of the holes arranged according to the __________.Not learned 52. The amount of fuel delivered by a unit injector is controlled by the __________.Not learned 53. When a nozzle tester is being used to test a "closed" type fuel injection nozzle, a clogged nozzle orifice will be indicated by a __________.Not learned 54. When a nozzle tester is used to check the spray pattern of a diesel fuel injection nozzle, which of the following statements is true?Not learned 55. What is the purpose of the delivery check valve used in a diesel fuel injection jerk pump?Not learned 56. As shown in the illustration of the fuel injection pump, the component labeled "N" would be identified as the __________Not learned 57. As shown in the illustration of the fuel injection pump, the component labeled "J" would be identified as the __________Not learned 58. Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires __________.Not learned 59. Fuel combustion in a diesel engine cylinder should begin just before the piston reaches top dead center and should __________.Not learned 60. The time between injection and ignition of the fuel is known as __________.Not learned 61. A 'Blotter test' is a test performed on the lube oil of a diesel engine which can determine ______.Not learned 62. Which of the following test indicators should be considered the most significant factor in determining as to whether or not a diesel-generator's lube oil should be drained and renewed?Not learned 63. If the analysis of used lube oil indicates a high content of iron particles, this could indicate __________.Not learned 64. Proper lubrication of the main bearings is more easily obtained in a single acting four-stroke cycle diesel engine than in a single acting two-stroke cycle diesel engine because __________.Not learned 65. Auxiliary diesel engines can be automatically shut down as a result of __________.Not learned 66. Where would a coarse screen wire mesh strainer normally be found on a diesel engine lubrication system?Not learned 67. Whether using a centrifuge or a simple filter, oil cleaning and filtration will be the most effective when the oil is at a __________.Not learned 68. Which of the listed substances can be satisfactorily removed from diesel fuel by centrifuging?Not learned 69. The temperature of the contaminated fuel oil fed to the centrifuge shown in the illustration should be __________Not learned 70. What would be considered a normal temperature increase between the inlet and outlet jacket cooling water of a medium or high-speed diesel engine operating at normal load?Not learned 71. If the jacket water temperature rises rapidly above normal in a diesel engine, you should FIRST __________.Not learned 72. A large, low-speed, main propulsion diesel engine uses sea water to directly cool the __________.Not learned 73. Combustion gas venting through the expansion tank can be caused by a __________.Not learned 74. In a naturally aspirated diesel engine, the volume of air intake is directly associated with engine __________.Not learned 75. An increase in the air inlet manifold pressure of a diesel engine will result in a/an __________.Not learned 76. Compared to a naturally aspirated diesel engine, a supercharged diesel engine has _________.Not learned 77. The power consumed during the scavenging process of a diesel engine is known as the _______.Not learned 78. On an opposed-piston engine, which of the listed operating conditions will result from increasing the lower crank lead?Not learned 79. The process of scavenging a two-stroke cycle diesel engine serves to __________.Not learned 80. In a Roots-type rotary blower, the volume of air delivered is directly proportional to __________.Not learned 81. Which of the designs listed will keep the lobes from making contact in a Roots-type blower?Not learned 82. 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 83. In a turbocharger, inlet air velocity is increased in the __________.Not learned 84. Which of the following statements is correct regarding a turbocharged four-stroke cycle diesel- generator?Not learned 85. What is the function of the after coolers installed in the diesel engine air intake system?Not learned 86. A water jacket is placed around the exhaust manifolds of propulsion diesel engines to __________.Not learned 87. In a diesel engine exhaust system, the cooling of the exhaust gases below their dew point, will result in __________.Not learned 88. One of the factors limiting the amount of load which can be put on a modern marine diesel engine is the __________.Not learned 89. The average exhaust temperature of a two-stroke cycle diesel engine with a turbine-driven supercharger is lower than a similar four-stroke cycle diesel engine at equal loads because __________.Not learned 90. Exhaust pipes for separate main propulsion diesel engines can be combined only when __________.Not learned 91. The exhaust system for a turbocharged diesel engine functions to ________.Not learned 92. Which of the diesel engine exhaust mufflers listed is usually equipped with a spark arrestor?Not learned 93. The formation of carbon monoxide in diesel exhaust gases is reduced by __________.Not learned 94. White smoke issuing from the exhaust of an auxiliary diesel engine could mean __________.Not learned 95. The PRIMARY function of a waste heat boiler is to __________.Not learned 96. Auxiliary boilers are divided into several classifications, one of which is __________.Not learned 97. The purpose of the separating nozzle in the accumulator of a water-tube, coil-type, steam generator is to separate __________.Not learned 98. Large steam drums are not required in the design of a coil-type auxiliary water-tube boiler because __________.Not learned 99. Which of the following statements concerning fire-tube boilers is correct?Not learned 100. The rate of heat transfer in a water-tube auxiliary boiler can be increased by __________.Not learned 101. Downcomers installed on auxiliary package boilers are protected from direct contact with hot gases by __________.Not learned 102. Fusible plugs are installed in fire-tube boilers to ________.Not learned 103. If a tube ruptures in a water-tube auxiliary boiler due to low water, you should ___________.Not learned 104. 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 105. The correct procedure for giving an auxiliary boiler a bottom blow, is to begin __________.Not learned 106. The most common cause of scale formation in an auxiliary boiler is __________.Not learned 107. Excessive alkalinity of the water in an auxiliary boiler can cause __________.Not learned 108. High stack temperature occurring in an auxiliary boiler could be a result of __________.Not learned 109. Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction?Not learned 110. The primary function of a flame safeguard system, as used on an automatically fired auxiliary boiler, is to prevent what condition?Not learned 111. The pressuretrol which is installed on an auxiliary boiler senses steam pressure changes and __________.Not learned 112. Which of the following actions takes place in the control circuit of an automatically fired auxiliary boiler when the desired steam pressure is obtained?Not learned 113. Which of the types of reduction gearing listed is best suited for medium-speed main propulsion units?Not learned 114. Reduction gear casings are vented in order to __________.Not learned 115. A diesel engine with a full speed of 1000 RPM drives a propeller at 300 RPM. What is the speed reduction ratio?Not learned 116. Hydraulic couplings will transmit torque equal to the input torque by means of energy changes in a rotating vortex of liquid. For the vortices to form there must be __________.Not learned 117. 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 118. Which of the following should always be checked prior to starting a diesel engine?Not learned 119. Which of the listed diesel engine operating conditions should be checked immediately after any diesel engine is started?Not learned 120. Which of the routine maintenance procedures listed is required for starting air receivers?Not learned 121. Which of the following statements is true concerning the air starting valve, labeled "III", as shown in the illustrationNot learned 122. Hydraulic starters are installed on many lifeboat diesel engines instead of comparable air start systems, because __________.Not learned 123. 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 124. Before any auxiliary diesel engine hydraulic starting system is opened for servicing or repair, you must __________.Not learned 125. Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions will be made easier by __________.Not learned 126. With respect to diesel fuel, the ease with which a cold engine will start is dependent upon the __________.Not learned 127. Which of the following procedures should be carried out when a large, low-speed, diesel engine is operated with one cylinder secured?Not learned 128. A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and the speed remaining below normal. The probable cause is __________.Not learned 129. Which of the listed conditions could result in the failure of an auxiliary diesel engine to stop running when a normal shutdown is attempted?Not learned 130. An auxiliary diesel-generator continues to run after you try to shut down. Your next course of action should be to _________.Not learned 131. The boiler shown in the illustration would be classed as __________Not learned 132. As shown in the illustration, the component labeled "N" would be identified as a ________Not learned 133. For optimum results, centrifugal purification of heavy fuel oil should be accomplished with the fuel at the lowest practicable __________.Not learned 134. 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 135. What actions should you take if the separator shown in the illustration trips due to excessive vibrationNot learned 136. The area indicated by the letter "W", shown in the illustration is correctly termed the __________Not learned 137. A main propulsion diesel engine on your ship docking tug has experienced a safety shutdown due to high lubricating oil temperature. What is the appropriate response?Not learned 138. When cleaning burner atomizers associated with an oil-fired auxiliary boiler fitted on your fishery research vessel, which of the following metals would be recommended to use in fabricating a tool for the purposes of carbon removal?Not learned 139. In a closed, re-circulating fresh water cooling system used for the main engines on your vessel, what function would chemical treatment with molybdate primarily perform?Not learned 140. Clutching takes place nearest the bearing shown in the illustration, located at number _____Not learned 141. The most common contaminate of governor hydraulic fluid is __________.Not learned 142. The component shown in the illustration would be identified as a/an __________Not learned 143. Component "U" of the diesel engine shown in the illustration is called the __________Not learned 144. Diesel engine closed, recirculating cooling water systems are particularly prone to cavitation corrosion/erosion. Which of the listed cooling system/engine components has surfaces in contact with the coolant that are most susceptible to this type of corrosion and erosion?Not learned 145. The diesel engine connecting rods shown in the illustration are distinctively named __________Not learned 146. The diesel engine shown in the illustration has the highest fuel pressure developed in the part labeled __________Not learned 147. In the diesel engine shown in the illustration, the purpose of the part labeled "P" is to __________Not learned 148. In a diesel engine starting motor equipped with a Bendix drive, the pinion moves and meshes with the flywheel ring gear due to __________.Not learned 149. The water inlet manifold for the diesel engine shown in the illustration is represented by the letter or number __________Not learned 150. The diesel engine wrist pin in the illustration is indicated by the component labeled __________Not learned 151. 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 152. Due to environmental and safety concerns, the towing winch drive diesel engine cooling water system is treated with propylene glycol for protection against freezing. According to the illustration, what would be the limit of protection if 40 pints of propylene glycol are used in treating a cooling water system with a volumetric capacity of 10 gallonsNot learned 153. An engine that runs rough or expels large amounts of black smoke may indicate a misfiring cylinder. Assume that the auxiliary diesel engines on your vessel have a fuel injection system that permits the injectors to be disabled for troubleshooting purposes by loosening the high-pressure fuel injection line fitting at the injector nozzle while the engine is running and noting the engine response. If before the injector is disabled the engine is running rough and expelling large amounts of black smoke, and after the injector is disabled, the engine runs even rougher, but continues to produce equally dense black smoke, what is indicated?Not learned 154. In the engine shown in the illustration, the part labeled "W" is cooled by __________Not learned 155. The exhaust ports shown in the illustration are identified with the letter "____"Not learned 156. The expansion tank for a diesel engine closed cooling system is designed to maintain a constant head on the system and __________.Not learned 157. Which factor determines the size of the ring dam for a fuel oil centrifugal purifier?Not learned 158. Which of the following precautions should be taken prior to starting the separator shown in the illustrationNot learned 159. Which of the following statements describes pertinent criteria for performing a surface blow for the purposes of removing excess chemicals and/or salinity as indicated by boiler water testing on an auxiliary steam boiler as fitted on your vessel?Not learned 160. A four-stroke eight cylinder in-line medium-speed diesel engine has a firing order of 1-5-2-6-8-4-7-3. If No.4 piston is at TDC and firing, how many degrees of crankshaft rotation will occur when No.5 piston reaches TDC and fires?Not learned 161. The fuel injector for the diesel engine shown in the illustration, is identified as _________Not learned 162. What is the function of component "13" shown in the illustrationNot learned 163. The function of the synchronizing motor on the generator governor illustrated is to __________Not learned 164. The gear drive, shown in the illustration, can have the backlash determined best by using a __________Not learned 165. Honing of a cylinder liner is performed to retain a certain amount of lubricating oil which reduces the wear on the piston rings and cylinder liner. A two-step honing process consists of pre-honing and __________.Not learned 166. The illustrated device is used to __________Not learned 167. In the illustrated diesel engine, which label points to the pistonNot learned 168. On the indicator card shown in the illustration, what do lines "A" and "B" indicateNot learned 169. Which of the indicator diagrams illustrated depicts the condition that should be corrected by retarding only the timingNot learned 170. The injector rack of the diesel engine shown in the illustration is indicated by the component labeled __________Not learned 171. When installing the bearing cap on the device shown in the illustration, which of the precautions listed must be observedNot learned 172. The item labeled #16 in the illustration is a stack of spring washers. Their function is to __________Not learned 173. Large slow-speed diesel engines have cylinder liners that are manufactured from which of the following materials?Not learned 174. The lube oil strainer shown in the illustration is used on the reduction gear of a mid-size diesel engine. The strainer elements consist of __________Not learned 175. Which lubricating oil additive is used in diesel engines to reduce the tendency for sludge and varnish to form on the engine parts?Not learned 176. After a main diesel engine on your vessel has experienced a safety shutdown due to excessive crank-case pressure, why is it important to wait 2 hours before opening the crankcase to investigate the cause of the trip?Not learned 177. The main engines on your vessel are fitted with speed control governors based on the operating principle shown in the illustration. What statement is true concerning the illustrated pressure-compensated governorNot learned 178. The main engine thrust bearing shown in the illustration contains how many thrust shoesNot learned 179. In a modern two stroke, slow speed, internal combustion diesel engine, what is the part of the engine that houses the crankshaft?Not learned 180. What is the normal bearing clearance permitted at the horizontal axis of the shaft for the bearing shown in the illustrationNot learned 181. You are observing the flame condition on an oil-fired auxiliary boiler through an observation window peephole. The flame is a reddish color accompanied by a noticeably panting/pulsating furnace. What would be the correlating color of the gases exhausting from the stack under these conditions?Not learned 182. Which of the operating characteristics listed is correct concerning the blower shown in the illustrationNot learned 183. When operating the HFO purifiers in "parallel", as shown in the illustration __________Not learned 184. In order to minimize the abrasive action of dust particles entering the combustion spaces of the diesel engines used on the offshore supply vessel to which you are assigned, each engine is protected with a heavy-duty air intake filter. Which one of the listed air intake filter elements is periodically cleaned as opposed to being periodically replaced with a new element?Not learned 185. After performing repairs on the fuel injection system or governor of a main propulsion diesel engine on your fishing industry factory ship, what precaution should be taken prior to starting the engine?Not learned 186. A photoelectric cell installed in an automatically fired auxiliary boiler burner management system __________.Not learned 187. The pinion gear shown in the illustration, is located __________Not learned 188. The piston shown in the illustration is a __________Not learned 189. Most practical high speed diesel engines today operate on a cycle which is a combination of the Diesel and Otto cycles. In this process, compression ignition __________.Not learned 190. The pressure-volume diagrams illustrated are of four internal combustion engine cycles. Which one represents the theoretical diesel cycleNot learned 191. What prevents the thrust bearing blocks shown in the illustration from rotating within the housingNot learned 192. Prior to starting an auxiliary diesel engine on your vessel, the crankcase oil level must be checked. At what checked level would you be required to add make-up oil?Not learned 193. Prior to starting a main propulsion diesel engine fitted on your multi-purpose offshore supply vessel, it has been determined that the transfer of make-up oil is required. At what checked level should you stop adding make-up oil?Not learned 194. While proceeding in open waters to a ship requiring docking assistance, one of the main engines on your ship-docking tug overheats. The high jacket water temperature alarm sounds, the freshwater thermometers indicate out of range (high), and the expansion tank level sight glass indicates out of range (high) with vapor bubbles forming and escaping through the vent. What is the appropriate initial response?Not learned 195. Regarding the fuel injector shown in the illustration, the purpose of piece #38 is to __________Not learned 196. The river push boat to which you are assigned is fitted with generator engines as partly shown in the illustration. What statement is true concerning the cylindersNot learned 197. The rotary-cup burner atomizes the fuel oil by which of the following methods?Not learned 198. The section of the turbocharger which would be connected to the aftercooler inlet is labeled __________Not learned 199. The vessel to which you are assigned has main diesel engines fitted with intake and exhaust systems as shown in the illustration. Under what circumstances would the check valve open and bypass the rotary-lobe roots blowerNot learned 200. As shown in the illustration, the function of component "3" is to ________Not learned 201. As shown in the illustration, if the vessel was operating at full sea speed, the area labeled "L" would be used to ________Not learned 202. When starting an auxiliary diesel engine in preparation for operation, what parameter must be checked FIRST upon start-up to avoid immediate engine damage?Not learned 203. A three-way thermostatic control valve regulates the diesel engine cooling water temperature by passing a portion of the water __________.Not learned 204. The thrust bearing shown in the illustration has over eight years of ahead running time. Measurements show "i1" is 4 mm and "i2" is 1 mm. Which of the following conditions is indicated and what steps should be taken, if anyNot learned 205. The turbocharged, four-stroke, diesel generator set drive engines on your vessel are protected with dry-type air intake filters. The filter element condition can be evaluated by attaching a water manometer to measure the vacuum in the air duct between the air intake filter and the turbocharger blower inlet. Assume that the manometer reads 10" of water column (negative) at rated engine rpm under full load with a clean, properly sealing filter element. What would a reading of 20" of water column (negative) indicate at rated engine rpm under full load?Not learned 206. The turbocharged, four-stroke, main propulsion diesel engines on your fishery research vessel are protected with dry-type air intake filters. The engines are fitted with dial-type restriction indicators measuring the pressure in the air duct between the air intake filter and the turbocharger blower inlet. Under what conditions should the air intake filters be evaluated using the restriction indicators?Not learned 207. What type of bearing is shown in the illustrationNot learned 208. The unit of measure expressed as centistokes (cSt) is a measure of what fuel property?Not learned 209. Valve lash or clearance refers to the __________.Not learned 210. When vapor is in contact with and remains at the same temperature as the boiling liquid from which it was generated, the vapor and liquid are said to be in which of the following?Not learned 211. While warming up the main engines on your offshore utility vessel while tied up at your own pier, one of the main engines suddenly sounds the low lube oil pressure alarm. What is the appropriate initial response?Not learned 212. If the water level as indicated by the gauge glass of an auxiliary boiler is in question, it should be blown down. Which of the following statements represents the proper procedure for performing a gauge glass blow down?Not learned 213. The wear liner shown in the illustration is indicated by the letter __________Not learned 214. Which of the tanks, shown in the illustration, supplies fuel to the emergency generatorNot learned 215. In the illustration provided, which label indicates the wear linerNot learned 216. Which area of the indicator diagram illustrated, indicates the afterburning period in a diesel engine cylinderNot learned