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

USCG Motor Plants & Auxiliary Boilers (Set 25)

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Question 1 of 30

In general, diesel engine waste heat boiler construction is usually of the _________.

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30 MCQs

#1 In general, diesel engine waste heat boiler construction is usually of the _________. #2 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 malfunction? Illustration MO-0114 #3 The circuit shown in the illustration represents a/an __________. Illustration MO-0115 #4 Which of the following statements describes the function of the device labeled "C" shown in the illustration? Illustration MO-0115 #5 A schematic diagram of an isochronous hydraulic governor is shown in the illustration. When the load is removed the speed increases, and the __________. Illustration MO-0100 #6 The governor for an emergency diesel generator is shown in the illustration. When a large change in load results in a change in engine speed, which of the parts listed will be the FIRST governor component to react to the change in load? Illustration MO-0094 #7 The process of scavenging a two-stroke cycle diesel engine serves to __________. #8 Aftercooling of a turbocharged diesel engine will result in __________. #9 Forcing the exhaust gases from the cylinder of an operating two-cycle diesel engine with the aid of a blower is known as __________. #10 What statement is true concerning the charge air system of a modern turbocharged slow-speed two-stroke cycle diesel engine? #11 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 __________. #12 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 __________. #13 Irregular engine speed in a diesel-generator can be caused by __________. #14 A modern centrifuge, similar to the device shown in the illustration, is opened for periodic cleaning. The most common cause of operating failure after reassembling is due to __________. Illustration MO-0012 #15 Casing drains may be required on a waste heat boiler gas passage to __________. #16 Air motors used for starting some auxiliary diesel engines are generally the type known as __________. #17 The pinion of an auxiliary diesel-electric starting motor normally engages the flywheel ring gear by means of a/an __________. #18 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 #19 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 __________. #20 The diesel engine wrist pin in the illustration is indicated by the component labeled __________. Illustration MO-0122 #21 In a diesel engine closed fresh water cooling system employing a radiator, proper water temperature can be obtained by __________. #22 What is the function of the aftercoolers installed in the diesel engine air intake system? #23 The power output of a turbocharged diesel engine will drop if the cooling water flow through the aftercooler is interrupted because the __________. #24 A sudden power loss from a turbocharged and aftercooled diesel engine is an indication of a/an __________. #25 The highest pressure in any closed diesel engine fresh water cooling system is at the __________. #26 Cooling water pumps driven by direct reversing diesel engines are usually __________. #27 A closed fresh water cooling system is commonly used with marine diesel engines because the __________. #28 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 __________. Illustration MO-0057 #29 Where would a coarse screen wire mesh strainer normally be found on a diesel engine lubrication system? #30 Lube oil cannot be efficiently filtered if it’s __________.

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