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

USCG Motor Plants & Auxiliary Boilers (Set 21)

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Question 1 of 30

What type of propeller thrust reversing method (or methods) is or are used with a main propulsion slow-speed crosshead type diesel engine installation?

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30 MCQs

#1 What type of propeller thrust reversing method (or methods) is or are used with a main propulsion slow-speed crosshead type diesel engine installation? #2 Diesel engines powering large vessels that drive fixed-pitch propellers through a non-reversing reduction gear are of what type? #3 The component shown in the illustration, labeled "I", is the __________. Illustration SE-0013 #4 In addition to achieving a speed reduction for efficient propeller operation, what statement represents other possible functional purposes for reduction gears? #5 The purpose of the main diesel engine reduction gears is to __________. #6 What would be the most accurate description of the illustrated cutaway drawing of a reduction gear as used for medium-speed diesel propulsion? Illustration MO-0085 #7 Which of the following methods is used to lubricate main propulsion medium-speed diesel engine reduction gears? #8 In what location is heavy fuel oil kept above the flash point, but below the boiling point of water? #9 In what location is heavy fuel oil kept below the flash point? #10 In an HFO service system, what is the immediate destination of the fuel unconsumed by the main propulsion diesel engine? #11 By what means are two sections of propulsion line shafting typically joined together? #12 What statement is true concerning oil-lubricated stern tube bearings? #13 What is the primary purpose of self-aligning spherically-seated line shaft bearings? #14 In addition to checking the lube oil sump level and temperature of a line shaft steady bearing, what else must be checked for? #15 When checking a water-lubricated stern tube bearing while underway, what should be checked for? #16 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 __________. #17 Which of the following relationships exist between the temperature developed in a combustion space, and the compression ratio of the engine? #18 According to the illustrated diesel propulsion plant fresh water cooling systems diagram, in which subsystem is the deaerator located? Illustration MO-0072 #19 According to the illustrated main and auxiliary diesel engine cooling water systems diagram, which of the following heat exchangers are connected directly in series with one another? Illustration MO-0129 #20 Corrosion inhibitors and/or soluble oils are added to diesel engine cooling systems to __________. #21 What would be the primary indication that a heavy fuel oil purifier supply pump suction strainer needed cleaning? #22 What would be the primary indication that a fuel oil service system booster pump duplex suction strainer needed to be shifted over and cleaned? #23 According to the illustrated diesel engine fuel treatment and fuel service systems schematic, what is the purpose of the valve labeled "1"? Illustration MO-0077 #24 When monitoring a heavy fuel oil treatment plant, what would be an indication that the treatment plant throughput volume is less than the main engine consumption? #25 According to the illustrated diesel engine fuel treatment and fuel service systems schematic, what would be the appropriate valve configuration for operating the two heavy fuel oil purifiers in series? Illustration MO-0077 #26 According to the illustrated diesel engine fuel treatment and fuel service systems schematic, what statement is true concerning the valves labeled "4" and "5"? Illustration MO-0077 #27 Injection pressure in a common rail fuel system is controlled by __________. #28 In a diesel engine jacket water cooler, with sea water cooling the engine jacket cooling water, what statement is true? #29 In a diesel engine lube oil cooler, with sea water cooling the lubricating oil, what statement is true? #30 Which of the devices listed is commonly used to compensate for the expansion and minor misalignments occurring between the main turbine rotor and the reduction gear?

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