Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR

USCG Motor Plants & Auxiliary Boilers (Set 28)

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Question 1 of 30

The pinion of an auxiliary diesel-electric starting motor normally engages the flywheel ring gear by means of a/an __________.

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30 MCQs

#1 The pinion of an auxiliary diesel-electric starting motor normally engages the flywheel ring gear by means of a/an __________. #2 During the starting of a diesel engine, compression gases are prevented from backing into the air starting system, shown in the illustration, by the __________. Illustration MO-0046 #3 Which of the following statements is true concerning the air starting valve, labeled "III", as shown in the illustration? Illustration MO-0046 #4 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 __________. #5 A six-cylinder, four-stroke cycle diesel engine is fitted with a rotary distributor type air starting system. The speed of the rotating distributor disc is __________. #6 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 __________. #7 In order to reverse the rotation of a two-stroke cycle loop scavenged, direct reversing, propulsion diesel engine, the cam positions must be changed for the __________. #8 Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions will be made easier by __________. #9 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 __________. #10 Where would a coarse screen wire mesh strainer normally be found on a diesel engine lubrication system? #11 Wrist pin bearings are difficult to lubricate because of their oscillating motion and __________. #12 The upper piston rings in large, slow-speed, two-stroke cycle diesel engines are most effectively lubricated by oil __________. #13 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 __________. #14 What type of engine lubrication oil filter system sends filtered oil directly to the high-pressure supply gallery? #15 In a bypass type lubrication system for a diesel engine, the dirty oil line to the centrifuge should be taken from the __________. #16 The component labeled as part No.20 in the illustration is used to __________. Illustration MO-0050 #17 Precombustion chambers and energy cells in high-speed, small bore diesel engines all serve to increase ________. #18 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°F? Illustration MO-0113 #19 To minimize corrosion, fuel oil strainer disks, spacers and scraper blades are made of __________. #20 Which of the following precautions should be taken prior to starting the separator shown in the illustration? Illustration MO-0127 #21 Which of the labeled figures illustrated, represents the correct alignment mark relationships of a properly reassembled centrifuge bowl? Illustration MO-0022 #22 In the device shown in the illustration, the component lettered "A" is the __________. Illustration MO-0012 #23 How is oil supplied to the device shown in the illustration? Illustration MO-0127 #24 The system shown in the illustration utilizes a water transducer which is __________. Illustration MO-0127 #25 Which of the listed types of gasket material should be used on high-pressure fuel oil lines on a diesel engine? #26 Heavy fuel oil used in the system shown in the illustration will have the lowest viscosity __________. Illustration MO-0058 #27 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°C? Illustration MO-0113 #28 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 required? Illustration MO-0113 #29 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°F. Illustration MO-0113 #30 What is the function of the aftercoolers installed in the diesel engine air intake system?

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