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

USCG Motor Plants & Auxiliary Boilers (Set 13)

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Question 1 of 30

What occurs within the tubes of the device labeled "23" shown in the illustration? Illustration MO-0111

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30 MCQs

#1 What occurs within the tubes of the device labeled "23" shown in the illustration? Illustration MO-0111 #2 Item "10" shown in the illustration is used to __________. Illustration MO-0111 #3 The expansion tank for a diesel engine closed cooling system is designed to maintain a constant head on the system and __________. #4 The temperature at which an adjustable bellows type thermostatic valve operates is determined by __________. #5 The thermostatic valve in the illustration is used for controlling the coolant temperature in a main propulsion diesel engine. Which of the following can be used to verify proper valve operation with the valve disassembled? Illustration MO-0079 #6 Why will a turbocharged diesel engine produce black smoke if excessive additional load is applied too quickly? #7 In a turbocharger, inlet air velocity is increased in the __________. #8 Regarding the turbocharger shown in the illustration, the part labeled "B" would be attached to the __________. Illustration MO-0080 #9 In a Roots-type rotary blower, the volume of air delivered is directly proportional to __________. #10 Which of the designs listed will keep the lobes from making contact in a Roots-type blower? #11 The power consumed during the scavenging process of a diesel engine is known as the __________. #12 A loop or cross scavenged engine utilizes the motion of its pistons and a turbocharger to provide scavenging air. Which of the listed mechanical designs prevents the air under the pistons from being pumped back through the scavenge ports during the piston power stroke? #13 The device used to limit engine torque at various engine speeds is called a __________. #14 Sensitivity for a diesel engine governor is described as the __________. #15 The principal characteristic of an isochronous governor is it will __________. #16 Diesel engine control can be obtained by the bridge __________. #17 Diesel engines driving alternators operating in parallel must maintain a set frequency regardless of load changes. The governor characteristic used to accomplish this is known as __________. #18 Direct reversible main propulsion diesel engines would normally be fitted with a/an __________. #19 The direct acting mechanical governor used with some small diesel engines, controls fuel flow to the engine by __________. #20 The governor, shown in the illustration, will have its preset speed droop altered whenever __________. Illustration MO-0092 #21 As the load is being decreased on the engine controlled by the governor shown in the illustration, the __________. Illustration MO-0092 #22 In a simple hydraulic governor with speed droop, oil under pressure is maintained ready for use in the __________. #23 The function of the synchronizing motor on the generator governor illustrated is to __________. Illustration MO-0092 #24 Which of the listed conditions will result in the failure of an auxiliary diesel engine to shut down? #25 Ethylene glycol, when used as a coolant in a closed cooling system for a diesel engine, is more advantageous than untreated raw water because it __________. #26 If the coolant temperature is too low as it passes through internally cooled fuel injectors, the injectors can be damaged by __________. #27 The most common contaminate of governor hydraulic fluid is __________. #28 If a hydraulic governor has been refilled with oil, the engine should be operated until it reaches normal temperature, then the air should be purged, and the __________. #29 Adjustments to the compensating needle valve in a hydraulic governor should be made with the engine at __________. #30 What is the normal bearing clearance permitted at the horizontal axis of the shaft for the bearing shown in the illustration? Illustration MO-0121

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