Pass Benchmark: 70% • Standard: USCG NMC / 46 CFR
USCG Engine Safety (Supplementary) (Set 8)
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Question 1 of 30
During the valve overlap period, the exhaust pressure of a turbocharged, four- stroke/cycle diesel engine must be less than the intake manifold pressure to ensure __________.
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30 MCQs #1 During the valve overlap period, the exhaust pressure of a turbocharged, four- stroke/cycle diesel engine must be less than the intake manifold pressure to ensure __________. #2 The purpose of the compensating adjustment used in a diesel engine hydraulic governor is to __________. #3 If governor Item #19 in the illustration were to break on a diesel engine operating under full load, the engine RPM will __________. Illustration MO-0095 #4 In the illustrated auxiliary diesel engine governor, decreasing the distance between piece #6 and piece #10 will affect the engine by __________. Illustration MO-0094 #5 An auxiliary diesel generator continues to run after you try to shut down. Your next course of action should be to _________. #6 What is the best way of stopping an over speeding diesel engine? #7 Sacrificial zinc anodes are used on the saltwater side of diesel engine heat exchangers to __________. #8 Which of the listed effects would mixtures of ethylene glycol and phosphate compounds have on the metal surfaces of the cooling system of a diesel engine? #9 A diesel generator governor is hunting. After changing the oil, the governor is flushed and the compensation needle valve is adjusted, but the hunting persists. You should NOW __________. #10 When installing the bearing cap on the device shown in the illustration, which of the precautions listed must be observed? Illustration MO-0121 #11 Diesel engine exhaust gas temperatures can be used to determine individual cylinder __________. #12 The instrument shown in the illustration would be used on a diesel engine to __________. Illustration MO-0031 #13 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 __________. #14 As shown in the illustration, which of the following conditions would be responsible for a "low pressure in oil outlet" alarm to be indicated? Illustration MO-0127 #15 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 restricted? Illustration MO-0112 #16 The thrust bearing shown in the illustration has over eight years of ahead running time. Measurements show "i1" is 4 mm and "i2" is 1mm. Which of the following conditions is indicated and what steps should be taken, if any? Illustration MO-0121 #17 Antifreeze solutions containing ethylene glycol, should not be mixed with corrosion protection oils, as the resultant mixture __________. #18 Excessive wear at part #11, shown in the illustration would result in __________. Illustration MO-0027 #19 The thrust bearing shown in the illustration has over eight years of ahead running time. Measurements show "i1" is 4 mm and "i2" is 1mm. Which of the following conditions is indicated and what steps should be taken, if any? Illustration MO-0121 #20 High stack temperature occurring in an auxiliary boiler could be a result of __________. #21 A diesel engine operates erratically, over speeds, 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? #22 The governor utilized with the device shown in the illustration has become inoperative while the vessel is underway at sea. Which of the following statements describes what action should be taken? Illustration MO-0119 #23 The power output of a turbocharged diesel engine will drop if the cooling water flow through the after cooler is interrupted because the __________. #24 Before any work is done on a burner in an automatically fired auxiliary boiler, you should always __________. #25 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 __________. #26 Following the failure of one turbocharger on a large, crosshead, main propulsion diesel engine, fitted with multiple turbochargers, which of the following actions should be taken prior to further operation of the engine? #27 Which of the listed design features is most common with a two-stroke cycle, low- speed main propulsion diesel engine? #28 There are two glands provided where the piston rod exits the cylinder shown in the illustration. The purpose of the top gland is to __________. Illustration MO-0083 #29 The piston rod scraper box incorporated in a two-stroke/cycle, crosshead diesel engine serves to __________. #30 The item labeled "T" as shown in figure 4 of the illustration is identified as the __________. Illustration MO-0025
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