Pass Benchmark: 70% • Standard: USCG NMC / 46 CFR
USCG Engine Safety (Supplementary) (Set 6)
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Question 1 of 30
The component labeled as part #20 in the illustration is used to __________. Illustration MO-0050
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30 MCQs #1 The component labeled as part #20 in the illustration is used to __________. Illustration MO-0050 #2 The upper piston rings in large, slow-speed, two-stroke/ cycle diesel engines are most effectively lubricated by oil __________. #3 Wristpin bearings are difficult to lubricate because of their oscillating motion and __________. #4 Precombustion chambers, and energy cells in high-speed, small bore diesel engines all serve to increase ________. #5 A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an __________. #6 If a particular liquid has a specific gravity of .96kg/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 #7 Which of the labeled figures illustrated, represents the correct alignment mark relationships of a properly reassembled centrifuge bowl? Illustration MO-0022 #8 Which of the following precautions should be taken prior to starting the separator shown in the illustration? MO-0127 #9 How is oil supplied to the device shown in the illustration? MO-0127 #10 The system shown in the illustration utilizes a water transducer which is __________. Illustration MO-0127 #11 In the device shown in the illustration, the component lettered "A" is the __________. Illustration MO-0012 #12 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 #13 Using the graph shown in the illustration, the oil being separated has a specific gravity of .87 kg/dm3 at 72.5°C. What will be the specific gravity if the temperature is lowered to 40°C? Illustration MO-0113 #14 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 .98 kg/dm3 at 59°F, what size regulating ring is required? Illustration MO-0113 #15 The replacement piping for diesel engine high pressure fuel systems must be the same length and diameter as the original piping to __________. #16 Which of the listed types of gasket material should be used on high pressure fuel oil lines on a diesel engine? #17 Heavy fuel oil used in the system shown in the illustration, will have the lowest viscosity __________. Illustration MO-0058 #18 The purpose of the interlocked three-way valve shown in the illustration is to __________. Illustration MO-0058 #19 What is the function of the after coolers installed in the diesel engine air intake system? #20 In a diesel engine closed freshwater cooling system employing a radiator, proper water temperature can be obtained by __________. #21 A three-way thermostatic control valve regulates the diesel engine cooling water temperature by passing a portion of the water __________. #22 In a diesel engine jacket water cooler, with seawater cooling the fresh water, the __________. #23 Using a cooling water temperature of 225°F (107.2°C), instead of 180°F (82.2°C) in an auxiliary diesel engine, will __________. #24 If the jacket water temperature rises rapidly above normal in a diesel engine, you should FIRST __________. #25 Diesel engine jacket water is used in the fresh water distillation process as the __________. #26 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? #27 Which operating parameter may need to be decreased when running a large main propulsion diesel engine at low load conditions? #28 As a general rule, what would be the recommended operating water jacket outlet temperature range for medium speed marine diesels set up with closed treated fresh water cooling systems and fitted with vented expansion tanks? #29 In a diesel engine closed freshwater cooling system, the cooling water pressure drop through the engine is 10 psig, and the pressure drop through the heat exchanger is 4 psig at maximum flow rates. The cooling water pump must produce a discharge head of at least __________. #30 The outlet from an expansion tank of a closed freshwater cooling system should be piped to the __________.
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