Q531 - Motor Plants I, USCG prep certification 2026

Progress: 24% (23/94)

Learning progress ?

1. When calculating the indicated power developed in a diesel engine cylinder, 1 horsepower is equivalent to "33,000 foot-pounds per minute". What conversion factor would be used if the values are based on metric "kilogram-meters per minute"?Not learned 2. The device shown in the illustration is a __________Not learned 3. Line "P" in the illustration is the __________Not learned 4. The bore of a diesel engine cylinder describes the __________.Not learned 5. The cubic inch (or liter) displacement of a cylinder is determined by the diameter of the piston and the __________.Not learned 6. The compression ratio of a diesel engine refers to the ratio between the __________.Not learned 7. If the compression ratio is increased on any diesel engine, __________.Not learned 8. The theoretical minimum compression ratio necessary to ensure compression ignition in a direct injection diesel engine is __________.Not learned 9. Which of the following relationships exist between the temperature developed in the combustion space, and the compression ratio of the engine?Not learned 10. The ratio of the brake horsepower to the indicated horsepower of a diesel engine is its __________.Not learned 11. The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing work. This is known as __________.Not learned 12. The average pressure exerted on a piston during each power stroke is termed __________.Not learned 13. In a diesel engine, after ignition of the fuel occurs, but before the piston reaches TDC, there is little change in the cylinder __________.Not learned 14. A diesel engine operating at a light load, when compared to operating at heavy load has an air/fuel ratio that is __________.Not learned 15. Theoretical perfect combustion in a diesel engine yields by-products of __________.Not learned 16. Heat for igniting the fuel oil in the cylinder of a diesel engine is generated by the __________.Not learned 17. The main operating characteristic of diesel engines which distinguishes them from other internal combustion engines is the __________.Not learned 18. As engine RPM is increased from idle speed to full load speed, which of the conditions listed will decrease?Not learned 19. Modern marine diesel engines equipped with mechanical fuel injection operate on a combustion cycle which is __________.Not learned 20. In describing engine operation, what does the term 'cycle' mean?Not learned 21. What determines the number of events occurring in a cycle of operation in an internal combustion engine?Not learned 22. The thermal energy produced by an internal combustion engine is transformed into ________.Not learned 23. Diesel engines are classified as reciprocating internal combustion engines because they __________.Not learned 24. The minimum fuel oil delivery pressure required for efficient injection depends primarily on the __________.Not learned 25. Which of the listed design features is most common with a two-stroke cycle, low-speed main propulsion diesel engine?Not learned 26. In a two-stroke/cycle, opposed piston, diesel engine, one crankshaft operates several crank angles in advance of the other crankshaft to __________.Not learned 27. When is fuel injected into a cylinder of diesel engines?Not learned 28. The start of fuel oil injection into the cylinder of a four-stroke cycle diesel engine occurs during the __________.Not learned 29. In the pressure-volume diagram, shown in the illustration, the volume line is divided into 16 units indicating __________Not learned 30. The highest pressure in a diesel engine cylinder normally occurs __________.Not learned 31. In the pressure-volume diagram shown in the illustration, the atmospheric pressure line is indicated by line __________Not learned 32. An indicator card or pressure-volume diagram shows graphically the __________.Not learned 33. Which area of the indicator diagram illustrated indicates the ignition delay period in a diesel engine cylinderNot learned 34. For a given fuel, a change in the compression ratio will affect the ignition lag by which of the listed means?Not learned 35. 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 36. 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 37. When a generator diesel engine is operated at partial load, as compared to full load, a decrease will occur in the average __________.Not learned 38. A four cylinder, four stroke/cycle, single acting diesel engine has a 740 mm bore and a 1500 mm stroke. What indicated power will be developed if the average mean effective pressure is 18 kg/cm² at a speed of 90 RPM?Not learned 39. An eight cylinder, four-stroke cycle, single acting diesel engine has a 650 mm bore and a 1400 mm stroke. What will be the developed indicated metric horsepower if the average mean effective pressure is 30 kg/cm2 at a speed of 100 RPM?Not learned 40. A six cylinder, two stroke/cycle diesel engine is 83% efficient and has a cylinder constant of 0.998 while operating with a mean effective pressure of 15 kg/cm² at a speed of 100 RPM. What is the metric brake horse power developed?Not learned 41. A diesel engine indicator diagram has an area of 22 cm² and a length of 12.5 cm. If the scale of the indicator spring is 1 mm = 1 kg/cm², what is the cylinder mean effective pressure?Not learned 42. What is the average piston speed of a five cylinder low- speed engine with a bore of 29.5 inches (75 cm), a stroke of 63 inches (160 cm), and a rated speed of 123 RPM?Not learned 43. A diesel engine cylinder has a swept volume of 125 cubic inches and a compression ratio of 13.5 to 1. What is the clearance volume in the cylinder at top dead center?Not learned 44. If the piston stroke in a four-stroke cycle diesel engine is 10 1/2 inches and the speed of rotation of the crankshaft is 720 RPM, what is the average piston speed?Not learned 45. One method of constructing large marine diesel engines and reducing the total engine frame weight is through __________.Not learned 46. In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?Not learned 47. A diesel engine crankcase ventilation system __________.Not learned 48. What is the function of a diesel engine's stationary parts?Not learned 49. A safety crankcase cover differs from other diesel engine access doors in that it is fitted with a __________.Not learned 50. The purpose of an oil mist detector in a main propulsion diesel engine is to warn of __________.Not learned 51. Which of the following problems could develop due to the accumulation of oil vapors in the crankcase of a diesel engine?Not learned 52. One advantage of a vacuum feed sight glass indicator used on cylinder lubricators over the discharge side liquid filled type sight glass is __________.Not learned 53. Mechanical lubricators for diesel engine cylinders are usually small reciprocating pumps which are __________.Not learned 54. The rate of cylinder lubricating oil metered to each cylinder of a large, low-speed, main propulsion diesel engine is __________.Not learned 55. If a single cylinder relief valve on a main propulsion diesel engine begins to lift, but it is not possible to secure the engine, which of the following actions should be taken?Not learned 56. Which of the listed cylinder head design features is shown in the illustrationNot learned 57. One end of a cylinder for a medium or high-speed diesel engine is sealed by the piston and rings, the other end is sealed by the __________.Not learned 58. Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to __________.Not learned 59. What may cause a diesel engine cylinder head to crack?Not learned 60. Which statement about diesel engine combustion is true?Not learned 61. The greatest turbulence in a diesel engine cylinder is created by the __________.Not learned 62. Turbulence of the compressed air charge in a diesel engine cylinder increases __________.Not learned 63. Open combustion chambers are designed to __________.Not learned 64. What type of marine engine has a fuel nozzle and combustion chamber located between two pistons in a common cylinder liner?Not learned 65. A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an __________.Not learned 66. The purpose of the energy cell, or air cell, is to __________.Not learned 67. Cast iron pistons used in large propulsion diesel engines are constructed with __________.Not learned 68. During the power stroke, the side thrust of a trunk type piston is a result of the angle __________.Not learned 69. In an auxiliary diesel engine, one reason for knurling the piston skirt is to __________.Not learned 70. After a long period of operation, a wear ridge, caused by piston ring action, will develop near the top of the cylinder liner. This ridge must be removed during maintenance in order to prevent __________.Not learned 71. 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 72. Excessive side clearance between a piston ring and its groove will cause the ring to __________.Not learned 73. Barrel face, taper face, grooved, and chrome plated are all types of diesel engine __________.Not learned 74. The upper piston rings in large, slow-speed, two-stroke/ cycle diesel engines are most effectively lubricated by oil __________.Not learned 75. If sludge accumulates on the underside of a diesel engine piston, it will __________.Not learned 76. For diesel engine piston cooling, lubricating oil can be supplied to the pistons by a/an __________.Not learned 77. Shaker, circulation, and spray are the three general methods used in __________.Not learned 78. In diesel engines designed with a crosshead, the motion of the piston rod can be described as __________.Not learned 79. In a large slow-speed propulsion diesel engine, the force applied to the crosshead is __________.Not learned 80. In a large slow-speed propulsion diesel engine, the side thrust on the crosshead is the direct result of _____.Not learned 81. The insertion of shims between the foot of a marine type connecting rod and a bearing box would result in __________.Not learned 82. The small end of the connecting rod is attached to the piston with a __________.Not learned 83. Connecting rods in a diesel engine are used to connect the ________.Not learned 84. Wristpin bearings are difficult to lubricate because of their oscillating motion and __________.Not learned 85. Crank web deflection readings will give a positive indication of __________.Not learned 86. 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 87. Which of the components listed is only found in an opposed-piston engine?Not learned 88. Which of the terms listed below represents the operational speed at which excessive engine vibration is created?Not learned 89. Excessive mechanical and pulsating vibrations developed in a main propulsion diesel engine may be more likely to cause damage to an attached __________.Not learned 90. Which of the bearings listed below is most widely used for the main and connecting rod bearings of a modern high-speed diesel engine?Not learned 91. Bearing "crush" as applied to diesel engine main bearings, will result in __________.Not learned 92. The proper location for journal bearing oil grooves is __________.Not learned 93. A characteristic of a bearing material which permits small dirt particles to become embedded in the bearing surface is __________.Not learned 94. The load is always placed on the lower half of the main bearings in a __________.Not learned 95. The most crucial time for any bearing with regards to diesel engine lubrication is __________.Not learned 96. The arrangement and shape of the cams on a diesel engine camshaft directly control which of the listed groups of operating conditions?Not learned 97. In the illustrated engine, the fuel camshaft gear drive housing is letter __________Not learned 98. The camshaft drive is designed to maintain proper camshaft speed relative to crankshaft speed. In maintaining this relationship, the camshaft drive causes the camshaft to rotate at __________.Not learned 99. The speed of the camshaft in a two-stroke/cycle diesel engine, running at 950 RPM, is __________.Not learned 100. The use of push rods becomes necessary in a diesel engine when __________.Not learned 101. Valve cages are used on some large diesel engines to __________.Not learned 102. In a four-stroke cycle diesel engine, the intake valves open __________.Not learned 103. Multiple concentric valve springs are often used with diesel engine valves to __________.Not learned 104. The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by __________.Not learned 105. The opening of an exhaust valve on a modern, large, low-speed, main propulsion diesel engine, may be actuated by __________.Not learned 106. If there is a 'clicking' sound in the valve compartment of a diesel engine, the cause may be __________.Not learned 107. During diesel engine warm-up, which type of valve lash adjuster compensates for the change in length of the exhaust valve stem?Not learned 108. If the speeder spring of a main propulsion diesel engine governor breaks while operating at full load, the engine RPM will _________.Not learned 109. The hunting of a diesel engine may be caused by __________.Not learned 110. Governor hunting is caused by __________.Not learned 111. If the operating speed of a diesel engine increases without an apparent change in the engine control settings, you may suspect a __________.Not learned 112. 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 113. The desirable properties of a marine fuel oil should include __________.Not learned 114. The cetane number is the index used to measure a fuel oil's __________.Not learned 115. Which of the following statements is true concerning the cetane number of diesel fuel?Not learned 116. 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 117. The ignition quality of diesel fuel becomes LESS critical as __________.Not learned 118. In order for microbiological growths to thrive in a fuel tank it is necessary for __________.Not learned 119. Fuels as produced in a refinery are generally sterile; however, contamination can occur as fuels are __________.Not learned 120. Heavy fuel oils generally have an upper average ash content of 0.1% by weight. Which of the following conditions could be expected if the ash content increases above this amount?Not learned 121. When running a large, dual fuel, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching from heavy fuel oil to diesel oil?Not learned 122. Which of the listed types of gasket material should be used on high-pressure fuel oil lines on a diesel engine?Not learned 123. To minimize corrosion, what are fuel oil strainer disks, spacers and scraper blades made of?Not learned 124. Maintaining the proper fuel oil temperature will result in __________.Not learned 125. Injection pressure in a common rail fuel system is controlled by __________.Not learned 126. What is the primary purpose of a fuel injection system, besides metering and atomizing fuel?Not learned 127. Air is normally bled from a diesel engine fuel system by __________.Not learned 128. 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 129. Differential needle valves used in fuel injectors are directly closed by __________.Not learned 130. Why must fuel droplets injected into a diesel engine cylinder have adequate penetration?Not learned 131. Fuel oil penetration into the cylinder of a diesel engine is __________.Not learned 132. What effect does proper atomization of fuel have in a diesel engine combustion chamber?Not learned 133. What is the term given to the process of breaking up fuel oil into very fine particles for better combustion?Not learned 134. In a unit injector, an upper helix and lower helix are machined in the lower part of the plunger for __________.Not learned 135. Fuel injector nozzles are usually of the multi-orifice type with the number and placement of the holes arranged according to the __________.Not learned 136. The degree of fuel atomization in a diesel engine cylinder depends primarily on __________.Not learned 137. The amount of fuel delivered by a unit injector is controlled by the __________.Not learned 138. 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 139. 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 140. When a fuel injection nozzle overheats, which of the problems listed can be expected?Not learned 141. What is the purpose of the "window" installed in the housing of an individual jerk pump?Not learned 142. What is the purpose of the delivery check valve used in a diesel fuel injection jerk pump?Not learned 143. As shown in the illustration of the fuel injection pump, the component labeled "N" would be identified as the __________Not learned 144. Surface irregularities, such as erosion and pitting on injection pump plungers, will __________.Not learned 145. Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires __________.Not learned 146. Fuel combustion in a diesel engine cylinder should begin just before the piston reaches top dead center and should __________.Not learned 147. The time between injection and ignition of the fuel is known as __________.Not learned 148. The control rack to a unit injector regulates fuel delivery by __________.Not learned 149. High cylinder firing pressure, accompanied by low exhaust temperature, can result from __________.Not learned 150. One cause of diesel engine fuel ignition delay is __________.Not learned 151. Two important considerations for the proper lubrication of a diesel engine include, the delivery of the oil in sufficient amount, and the __________.Not learned 152. A diesel engine exposed to widely varying ambient temperatures should use a lubricating oil with __________.Not learned 153. A diesel engine should use which type of lubricating oil?Not learned 154. The highest indicated lube oil pressure in a diesel engine should be expected when the engine oil is _________.Not learned 155. The TBN value of diesel engine lube oil refers to its ability to __________.Not learned 156. A well-lubricated bearing surface always appears __________.Not learned 157. The adverse effects of burning high sulfur fuel can be compensated for by using a cylinder oil having sufficient __________.Not learned 158. In a normally operating diesel engine, the main source of lubricating oil contamination in the crankcase is a result of the __________.Not learned 159. A 'Blotter test' is a test performed on the lube oil of a diesel engine which can determine ______.Not learned 160. 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 161. How often should the lubricating oil of a diesel engine be changed?Not learned 162. If the analysis of used lube oil indicates a high content of iron particles, this could indicate __________.Not learned 163. A decrease in the flash point of diesel engine lube oil indicates the lube oil has become __________.Not learned 164. Which of the following devices is normally provided to prevent oil starvation in a diesel engine lubrication system utilizing the "full flow" principle?Not learned 165. Lube oil pumps taking suction from the sump of most small marine engines are usually __________.Not learned 166. The lube oil pump used in a diesel engine is normally a __________.Not learned 167. Maximum lube system operating pressure for a diesel engine is normally regulated by a/an __________.Not learned 168. The lube oil cooler is located after the lube oil filter in order for __________.Not learned 169. On most modern diesel engines, the main and connecting rod bearings receive their lubricating oil by __________.Not learned 170. 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 171. What could cause the bypass valve in a full flow lubrication system to open?Not learned 172. Lube oil in the fresh water cooling system of a diesel engine may result from a __________.Not learned 173. Auxiliary diesel engines can be automatically shut down as a result of __________.Not learned 174. Before starting a diesel engine that has an engine driven lube oil pump, the engineer should __________.Not learned 175. A spring-loaded relief valve is located on some lube oil filters in full flow systems to __________.Not learned 176. What type of engine lubrication oil filter system sends filtered oil directly to the high-pressure supply gallery?Not learned 177. Lube oil filters remove contaminants more efficiently if the oil being filtered is __________.Not learned 178. Most large main propulsion diesel engines use a duplex lube oil strainer to __________.Not learned 179. Where would a coarse screen wire mesh strainer normally be found on a diesel engine lubrication system?Not learned 180. In a bypass type lubrication system for a diesel engine, the dirty oil line to the centrifuge should be taken from the __________.Not learned 181. 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 182. For a continuous operation diesel engine, a duplex filter unit would be the best arrangement because __________.Not learned 183. Which of the listed substances can be satisfactorily removed from diesel fuel by centrifuging?Not learned 184. The temperature of the contaminated fuel oil fed to the centrifuge shown in the illustration should be __________Not learned 185. 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 186. If a particular liquid has a specific gravity of 0.96 kg/dm3 at 77°F, what will be the specific gravity of the liquid, as determined from the graph shown in the illustration, if the temperature is increased to 167°FNot learned 187. Using the graph shown in the illustration, the oil being separated has a specific gravity of 0.87 kg/dm3 at 72.5°C. What will be the specific gravity if the temperature is lowered to 40°CNot learned 188. 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 189. Which of the following statements represents the working principle of the water transducer used with the separator shown in the illustrationNot learned 190. Item labeled "R" as shown in Fig. 5 of the illustration is identified as the __________Not learned 191. Reduction gear lube oil temperatures for keel cooler installations are generally __________.Not learned 192. Antifreeze solutions containing ethylene glycol should not be mixed with corrosion protection oils, as the resultant mixture __________.Not learned 193. Combustion gas venting through the expansion tank can be caused by a __________.Not learned 194. Which of the following statements is true concerning a main diesel engine oil cooler?Not learned 195. Heat exchangers are most commonly found in a small auxiliary diesel engine __________.Not learned 196. The intake ports of a two-stroke cycle diesel engine are opened and closed by the action of the __________.Not learned 197. Corrosion and grooving on the blading of an exhaust driven turbocharger is caused by certain components of residual fuel oils. These components are vanadium, sodium, and __________.Not learned 198. The power output of a turbo-charged diesel engine will drop if the cooling water flow through the after cooler is interrupted because the __________.Not learned 199. Before being shut down, a diesel engine should idle a few minutes in order to __________.Not learned 200. Oil accumulating in the exhaust piping or manifold of a diesel engine can be caused by __________.Not learned 201. Clogged or partially obstructed exhaust ports on a diesel engine can cause __________.Not learned 202. High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by __________.Not learned 203. The formation of carbon monoxide in diesel exhaust gases is reduced by __________.Not learned 204. White smoke issuing from the exhaust of an auxiliary diesel engine could mean __________.Not learned 205. Excessive vibration from an auxiliary boiler could be caused by __________.Not learned 206. Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction?Not learned 207. Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or __________.Not learned 208. 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 209. An oil-operated, direct-reversing mechanism on a large, low-speed, main propulsion diesel engine, can serve to __________.Not learned 210. During maneuvering operations for a direct reversing large, low-speed, main propulsion diesel engine, which of the following actions is used to stop the shaft from turning prior to changing the engine rotation for a vessel with moderate headway?Not learned 211. Which of the following should always be checked prior to starting a diesel engine?Not learned 212. Which of the listed diesel engine operating conditions should be checked immediately after any diesel engine is started?Not learned 213. The minimum speed an engine must attain before ignition can occur depends upon __________.Not learned 214. In the starting process of a diesel engine, the main object is to attain the compression conditions sufficient to _________.Not learned 215. When restarting a heavy fuel diesel engine that has been stopped for some time, the engineer should __________.Not learned 216. A diesel engine may fail to start when being cranked, due to __________.Not learned 217. Which of the routine maintenance procedures listed is required for starting air receivers?Not learned 218. Starting systems for large, direct reversing, main propulsion diesel engines are usually __________.Not learned 219. The pilot valves in an air pilot starting system for a two-stroke cycle, direct reversing, main propulsion diesel engine are operated by either a ported distributor disc or a/an __________.Not learned 220. Which of the following statements is true concerning the air starting valve, labeled "III", as shown in the illustrationNot learned 221. Starting air check valves are held firmly on their seats by __________.Not learned 222. A six-cylinder, two-stroke/cycle diesel engine is fitted with a rotary distributing air starting system. The speed of the rotating distributor disc is __________.Not learned 223. When an air started, four-stroke cycle diesel engine is being cranked over, the starting air is admitted to each cylinder during the beginning of its ________.Not learned 224. 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 225. Air motors used for starting some auxiliary diesel engines are generally the type known as __________.Not learned 226. Which internal combustion engine starting system uses a vane type fluid motor?Not learned 227. In addition to the main starting air compressor, another air compressor, driven by a separate power source, is installed to __________.Not learned 228. Where is the air charge for an air starting system stored?Not learned 229. Intercoolers installed on starting air compressors, reduce the possibility of __________.Not learned 230. A two-stroke cycle diesel engine requires less starting air than a four-stroke cycle diesel engine, of equal displacement, because the two-stroke cycle diesel engine ______.Not learned 231. On a diesel engine with direct-cylinder admission air starting, a leaking air starting valve would be indicated by __________.Not learned 232. An accumulator used in a hydraulic starting system is generally located between the __________.Not learned 233. Hydraulic starters are installed on many lifeboat diesel engines instead of comparable air start systems, because __________.Not learned 234. Which type of starter motor is sometimes utilized in a diesel engine hydraulic starting system?Not learned 235. 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 236. The purpose of the engine-driven hydraulic pump in an auxiliary diesel engine hydraulic starting system is to __________.Not learned 237. Before any auxiliary diesel engine hydraulic starting system is opened for servicing or repair, you must __________.Not learned 238. For a diesel engine, approximately how long can an electric starter motor be operated continuously before damage may begin to occur due to overheating?Not learned 239. The pinion of an auxiliary diesel-electric starting motor normally engages the flywheel ring gear by means of a/an __________.Not learned 240. Electric starting motors for diesel engines require high current for operation and __________.Not learned 241. Auxiliary diesel engine electric starting motors use __________.Not learned 242. Diesel engine electric starting motors generally require heavier duty motors and operate at higher voltages than comparable starting motors for gasoline engines due to __________.Not learned 243. Which of the following conditions is most likely to occur if the electric starter motor pinion gear fails to disengage from the flywheel of a diesel engine after the engine has started?Not learned 244. In a Bendix starter drive, the pinion engagement with the flywheel ring gear is initiated by __________.Not learned 245. Which of the following operating characteristics of the Bendix drive friction clutch is associated with a Bendix drive starter?Not learned 246. Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions will be made easier by __________.Not learned 247. When starting a diesel engine at temperatures below 70°F, the frictional resistance to turning will be __________.Not learned 248. Which of the listed diesel engine starting systems is most susceptible to difficulties in cold weather?Not learned 249. Which of the following effects will excessively cold lube oil have on the operation of a diesel engine?Not learned 250. With respect to diesel fuel, the ease with which a cold engine will start is dependent upon the __________.Not learned 251. Starting aids, such as glow plugs, are usually installed on __________.Not learned 252. Which of the following procedures should be carried out when a large, low-speed, diesel engine is operated with one cylinder secured?Not learned 253. If the relief valve on a diesel engine cylinder lifts, the cause could be due to __________.Not learned 254. 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 255. When starting air is admitted, a diesel engine turns over very slowly without firing. The cause may be __________.Not learned 256. A four-stroke cycle main propulsion diesel engine fails to start at normal cranking speed with normal fuel pressure and ambient temperature. The reason for the failure could be __________.Not learned 257. A diesel engine may be hard to start if the __________.Not learned 258. 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 259. 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 260. An auxiliary diesel-generator continues to run after you try to shut down. Your next course of action should be to _________.Not learned 261. What is the best way of stopping an overspeeding diesel engine?Not learned 262. Which of the conditions listed would indicate a large condenser tube leak within the distiller shown in the illustrationNot learned 263. For optimum results, centrifugal purification of heavy fuel oil should be accomplished with the fuel at the lowest practicable __________.Not learned 264. If valve "D" is opened during the normal operation of the distiller shown in the illustration, which of the events listed will occurNot learned 265. If the wearing rings of device "7" shown in the illustration become worn, how will the evaporation rate in "23" be affectedNot learned 266. What would be the first indication that a tube leak has occurred in area "23"Not learned 267. According to the diagram shown in the illustration, the lube oil system can best be described as a __________Not learned 268. According to the illustration, fuel delivery to the cylinder is terminated and controlled with the component that is identified as the letter _________Not learned 269. 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 270. According to regulations, what is the minimum nominal pipe size for a fuel oil service tank vent line?Not learned 271. Air/Fuel ratio is defined as __________.Not learned 272. All alarms occurring on the control unit of the device shown in the illustration will __________Not learned 273. The anchor handling vessel to which you are assigned is fitted with generator drive engines of the type shown in the illustration. In terms of operating cycle and cylinder configuration, what statement is trueNot learned 274. The area indicated by the letter "L" of the device shown in the illustration is properly called the __________Not learned 275. The area indicated by the letter "W", shown in the illustration is correctly termed the __________Not learned 276. A Bendix drive starting motor disengages the drive gear from the flywheel by __________.Not learned 277. Which of the combustion chambers shown in the illustration is referred to as an "energy cell" used in some small diesel enginesNot learned 278. The combustion of fuel for the illustrated engine is initiated by __________Not learned 279. In the common rail system, excessive pressure in the header may be caused by __________.Not learned 280. The component identified as item No.15 is used to __________Not learned 281. The component labeled "A" on the engine reversing device shown in the illustration, performs its function by transmitting _______Not learned 282. The component labeled as part #20 in the illustration is used to __________Not learned 283. The component shown in the illustration would be identified as a/an __________Not learned 284. Component "U" of the diesel engine shown in the illustration is called the __________Not learned 285. Under what condition would valves "4" and "5", as shown in the illustration, be closedNot learned 286. Crankcase explosions in propulsion diesel engines can result from which of the following?Not learned 287. On the cylinder indicator diagram illustrated, the dotted line indicated as "L" is describing the _________Not learned 288. On the cylinder indicator diagram illustrated, the maximum rise in pressure occurs during the period labeled as ______Not learned 289. The cylinders labeled "B" and "C" in the illustration are used to __________Not learned 290. Device "E" shown in the illustration is known as the __________Not learned 291. The device labeled "B", shown in the illustration is known as the __________Not learned 292. The device labeled 'C' shown in the illustration is known as the __________Not learned 293. The device labeled "H", shown in the illustration is referred to as the __________Not learned 294. The device labeled "D", as shown in the illustration, is the bowl __________Not learned 295. The device labeled "A", shown in the illustration, is known as the __________Not learned 296. The device shown in figure "A" of the illustration is used to __________Not learned 297. The device shown in the illustration can be automatically or manually desludged. The closing sequence at the end of the desludging cycle is initiated by opening which of the labeled components listed belowNot learned 298. The device shown in the illustration is classified as a/an __________Not learned 299. In the device shown in the illustration, the component lettered "A" is the __________Not learned 300. The diagram shown in the illustration may be used to determine the proper operation of the engine. Which of the following statements represents an accurate interpretation of the diagramNot learned 301. The diesel engine component labeled "1", shown in the illustration is called a/an __________Not learned 302. The diesel engine component labeled "3", shown in the illustration is called the __________Not learned 303. The diesel engine component labeled "5", shown in the illustration is known as the __________Not learned 304. The diesel engine connecting rods shown in the illustration are distinctively named __________Not learned 305. Some diesel engines are fitted with a thermometer in the cooling water outlet from each cylinder. If the cooling water temperature from all cylinders begins to rise above normal, you should suspect __________.Not learned 306. In the diesel engine illustrated, what part is under compression when firing is taking place in a particular cylinderNot learned 307. The diesel engine rocker arms shown in the illustration serve to __________Not learned 308. The diesel engine shown in the illustration, the exhaust manifold is indicated by the letter __________Not learned 309. The diesel engine shown in the illustration can be fitted with a pyrometer at each exhaust elbow. If one of the cylinder pyrometers is reading significantly higher than the others, which of the following should be your FIRST actionNot learned 310. The diesel engine shown in the illustration has the highest fuel pressure developed in the part labeled __________Not learned 311. In the diesel engine shown in the illustration, the purpose of the part labeled "P" is to __________Not learned 312. In the diesel engine shown in the illustration, the space below the cylinder liner lower seals is subjected to __________Not learned 313. 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 314. The water inlet manifold for the diesel engine shown in the illustration is represented by the letter or number __________Not learned 315. The diesel engine wrist pin in the illustration is indicated by the component labeled __________Not learned 316. The diesel generator set drive engines on your vessel are protected with heavy-duty oil bath air cleaners. The oil within these air cleaners should be periodically replaced in accordance with manufacturer recommendations. What statement best describes when it would be appropriate to deviate from the recommended frequency?Not learned 317. 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 318. The discharge nozzle shown in the illustration, is indicated by the letter __________Not learned 319. What event triggers the end of the steady combustion period in a diesel engine?Not learned 320. Excessive wear at part No.11, shown in the illustration would result in __________Not learned 321. The exhaust ports shown in the illustration are identified with the letter "____"Not learned 322. Which factor determines the size of the ring dam for a fuel oil centrifugal purifier?Not learned 323. The harbor tug to which you are assigned has a main engine fuel system as shown in the illustration. Besides preventing the attached fuel oil pump and the hand priming fuel oil pump from discharging through the other, what other purpose do the anti-flood check valves serveNot learned 324. Which of the following is not an advantage of pre-combustion chamber engines as compared to open combustion chamber engines?Not learned 325. Which of the following conditions will cause the engine to operate in area "A" of the diagram shown in the illustrationNot learned 326. Which of the following conditions would NOT be considered a valid reason for the diesel engine to operate in the area indicated by letter "B" shown in the illustrationNot learned 327. Which of the following fuel systems is characterized by a complete absence of high pressure fuel lines?Not learned 328. Which of the following precautions should be taken prior to starting the separator shown in the illustrationNot learned 329. Which of the following processes is indicated by the flow arrows shown in the illustrationNot learned 330. Which of the following represents the diesel engine camshaft shown in the illustration and its relative rotating speedNot learned 331. Which of the following statements is accurate concerning the vibration sensing device used with the separator shown in the illustrationNot learned 332. Which of the following statements describes "N" shown in the illustrationNot learned 333. 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 334. Which of the following statements represents the function of the plunger flange labeled "A" shown in the illustrationNot learned 335. Which of the following statements would apply when checking the valve clearance of the unit shown in the illustrationNot learned 336. Which of the following viscosity scales measures kinematic viscosity?Not learned 337. The force developed by the liquid within space "J" of the device shown in the illustration depends upon __________Not learned 338. 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 339. The fuel injector for the diesel engine shown in the illustration, is identified as _________Not learned 340. What is the function of component "13" shown in the illustrationNot learned 341. The gasket "U" shown in the illustration, is used to seal the liquid space below the __________Not learned 342. The gear drive, shown in the illustration, can have the backlash determined best by using a __________Not learned 343. 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 344. The greatest difference between the centrifuge bowl shown in the illustration and that of a tubular bowl, with straight, vertical, interior surfaces, is that the illustrated unit __________Not learned 345. Heavy fuel oil used in the system shown in the illustration will have the lowest viscosity __________Not learned 346. The illustrated device is used to __________Not learned 347. How is the illustrated strainer element cleaned during engine operationNot learned 348. The illustration is of a/an __________Not learned 349. On the indicator card shown in the illustration, what do lines "A" and "B" indicateNot learned 350. The indicator card shown in the illustration is produced with a/an __________Not learned 351. Which of the indicator diagrams illustrated depicts the condition that should be corrected by retarding only the timingNot learned 352. Which of the indicator diagrams illustrated indicates the condition that should be corrected by retarding the timing, and the fitting of thicker shims to the connecting rodNot learned 353. The injector rack of the diesel engine shown in the illustration is indicated by the component labeled __________Not learned 354. The inlet valves for the diesel engine shown in the illustration are indicated by the letter or number __________Not learned 355. When inspecting the valve mechanism shown in the illustration, normal maintenance would include __________Not learned 356. The instrument shown in the illustration would be used on a diesel engine to __________Not learned 357. Item '17' in the illustration is the dipstick. When should the length of the dipstick be changedNot learned 358. Item "O" of the device shown in the illustration is the __________Not learned 359. The item indicated by the letter "F" of the device shown in the illustration is the __________Not learned 360. Which of the labeled figures illustrated, represents the correct alignment mark relationships of a properly reassembled centrifuge bowlNot learned 361. In the large slow-speed main propulsion diesel engine shown in the illustration, the part labeled "G" is the __________Not learned 362. Which letter represents the exhaust gas exit point for the diesel engine shown in the illustrationNot learned 363. Which letter represents the scavenging air system non-return valve in the illustrationNot learned 364. Which letter represents the top deck (valve) cover of the engine shown in the illustrationNot learned 365. The line identified as "I" in the illustration is used to __________Not learned 366. Which of the listed types of pre-combustion chambers is used in the diesel engine shown in the illustrationNot learned 367. 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 368. A magnetic strainer is primarily used in diesel engine reduction gear oil systems to remove small particles of __________.Not learned 369. The main lube oil manifold, for the diesel engine shown in the illustration, is represented by the letter or number __________Not learned 370. How may water be removed from the bowl of the separator as shown in the illustrationNot learned 371. In a modern two stroke, slow speed, internal combustion diesel engine, what is the part of the engine that houses the crankshaft?Not learned 372. The offshore supply vessel to which you are assigned is fitted with generator set drive engines as shown in the illustration. What statement is true in terms of the combustion chamber designNot learned 373. A multi-orifice fuel injection nozzle is usually used with which of the listed types of combustion chamber?Not learned 374. The multi-purpose supply vessel to which you are assigned has diesel generators fitted with fuel systems as shown in the illustration. What statement is true concerning items "11", "13", and "15"Not learned 375. During the normal operation of the centrifuge shown in the illustration, the operating liquid solenoid and bypass valves for the cleaning cycle should be in which positionNot learned 376. During normal operation, the liquid retained in space 'J' of the device shown in the illustration is __________Not learned 377. In a normally operating diesel engine, the main source of lubricating oil contamination in the crankcase is a result of which of the following?Not learned 378. The vessel to which you are assigned is fitted with auxiliary engines as shown in the illustration. What statement is true concerning the valve guide and valve seat arrangementsNot learned 379. How is oil supplied to the device shown in the illustrationNot learned 380. One cylinder on an auxiliary diesel engine indicates a low firing pressure and high exhaust temperature. Which of the following operating conditions would most likely have caused this?Not learned 381. While operating the fuel oil centrifuge shown in the illustration, the bowl fails to open for sludge ejection. The probable cause is that __________Not learned 382. While operating the fuel oil centrifuge shown in the illustration, the fuel oil is being continuously ejected with the sludge and the seal water. The probable cause is the __________Not learned 383. When operating the HFO purifiers in "parallel", as shown in the illustration __________Not learned 384. In order to determine the restriction across a dry-type air filter on one of the diesel engines on your ship- docking tug, the engine should be operating at rated speed and load. What instrument would give the most accurate measurement of air filter element restriction?Not learned 385. The part labeled "X" shown in the illustration is a __________Not learned 386. The piston pin shown in the illustration should be classified as __________Not learned 387. The platform supply vessel to which you are assigned has a main engine fuel system as shown in the illustration. When the filter and water separator as shown in the day tank fill line are combined into one unit, what is this calledNot learned 388. If point #1 in the diagram shown is the beginning of gas compression, which of the cycles listed is being illustratedNot learned 389. The port "X" shown in the illustration allows water to enter the adjoining chamber. During what cycle of operation will this occurNot learned 390. The power/expansion stroke shown in the illustration is indicated by the diagram numbers __________Not learned 391. 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 392. Pre-combustion chambers differ from turbulence chambers in that pre-combustion chambers __________.Not learned 393. Pre-combustion chambers and energy cells in high-speed, small bore diesel engines all serve to increase ________.Not learned 394. Pre-combustion chamber engines inject fuel into an antechamber located in the cylinder wall or cylinder head. What is the antechamber referred to when the injection nozzle is located in the main combustion chamber, outside of the antechamber?Not learned 395. The pressure-volume diagrams illustrated are of four internal combustion engine cycles. Which one represents the theoretical diesel cycleNot learned 396. In the pressure-volume diagram shown in the illustration, curve 'A-d' indicates __________Not learned 397. In the pressure-volume diagram shown in the illustration, fuel injection occurs at point __________Not learned 398. In the pressure-volume diagram, shown in the illustration, what is indicated to have occurred by the line connecting points 'd' and 'e'Not learned 399. In the pressure-volume diagram, shown in the illustration, what occurs between points "e" and "f"Not learned 400. 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 401. 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 402. A propulsion engine, using the speed control circuit shown in the illustration, fails to function at speeds lower than the low end of the critical speed range. Which of the following statements describes what should be done to correct this malfunctionNot learned 403. The purpose of the interlocked three-way valve shown in the illustration is to __________Not learned 404. What is the purpose of the mixing tank shown in the illustrationNot learned 405. What is the purpose of water transducers used with the separator shown in the illustrationNot learned 406. Regarding the fuel injector shown in the illustration, the purpose of piece #38 is to __________Not learned 407. After removing the bowl hood of the device shown in the illustration, excessive quantities of sludge are visible. Which of the following statements represents the approach to rectify the situationNot learned 408. The rocker arms of the diesel engine shown in the illustration are indicated by __________Not learned 409. Which segment of the two-stroke cycle engine diagram shown in the illustration represents 'supercharging'Not learned 410. Which segment of the two-stroke cycle engine diagram shown represents the power strokeNot learned 411. 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 412. When servicing dry-type air filters as used on the vessel to which you are assigned, which of the following criteria would be the most accurate for determining the need for servicing?Not learned 413. Where does the shoot cycle operating liquid first come in contact with the rotating forces of the device shown in the illustrationNot learned 414. 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 415. As shown in the illustration of the fuel injection pump, the section designated as "M" is referred to as the __________Not learned 416. As shown in the illustration, the viscosimeter would be used to directly control the output of which of the following componentsNot learned 417. In the slow-speed diesel engine shown in the illustration, the part labeled "E" is the __________Not learned 418. 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 419. During the starting of a diesel engine, compression gases are prevented from backing into the air starting system, shown in the illustration, by the __________Not learned 420. The system shown in the illustration utilizes a water transducer which is __________Not learned 421. In terms of the diesel fuels burned in auxiliary and main propulsion diesel engines onboard vessels, which of the listed fuel properties would be most critical to consider when transferring and forwarding fuel in extremely low ambient temperature conditions?Not learned 422. Which of the terms listed below represents the speed at which the natural period of vibration of a shaft or other machine part is in synchronism with the power impulses?Not learned 423. What terminates the sludge discharge cycle of the device shown in the illustrationNot learned 424. 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 425. 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 426. 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 427. There are two glands provided where the piston rod exits the cylinder shown in the illustration. The purpose of the top gland is to __________Not learned 428. Which type of diesel engine fuel nozzle is shown in the illustrationNot learned 429. While underway, which of the following would be the FIRST step in reversing a direct reversing large, slow-speed, main propulsion, diesel engine?Not learned 430. The unit of measure expressed as centistokes (cSt) is a measure of what fuel property?Not learned 431. The unit shown in the illustration is beginning the sludge discharge cycle. The operating liquid solenoid valve has been energized and space "J" is filling up. Which of the following actions should occur nextNot learned 432. What is used as the primary operating medium during the sludge discharge cycle, shown in the illustrationNot learned 433. The wear liner shown in the illustration is indicated by the letter __________Not learned 434. In the diesel engine illustration provided, which of the given choices indicate rocker arm assembliesNot learned 435. Which segment of the two-stroke cycle engine diagram shown in the illustration represents the exhaust eventNot learned