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

USCG Motor Plants & Auxiliary Boilers (Set 23)

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Question 1 of 30

If the wearing rings of device '7' shown in the illustration become worn, how will the evaporation rate in '23' be affected? Illustration MO-0111

Browse Questions in Set 23

30 MCQs

#1 If the wearing rings of device '7' shown in the illustration become worn, how will the evaporation rate in '23' be affected? Illustration MO-0111 #2 Which of the conditions listed would indicate a large condenser tube leak within the distiller shown in the illustration? Illustration MO-0111 #3 If valve "D" is opened during the normal operation of the distiller shown in the illustration, which of the events listed will occur? Illustration MO-0111 #4 When cleaning a duplex strainer, it is important for __________. #5 If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase __________. #6 The lower water seal on a diesel engine wet cylinder liner must allow for liner axial movement. This seal is most commonly a __________. #7 Why are some diesel engine cylinder liners plated on the wearing surface with porous chromium? #8 The diesel engine shown in the illustration utilizes the type of cylinder construction identified as __________. Illustration MO-0007 #9 Bouncing of the valve gear in a diesel engine can be caused by __________. #10 Excessive wear at part #11, as shown in the illustration, would result in __________. Illustration MO-0027 #11 Oil accumulating in the exhaust piping or manifold of a diesel engine can be caused by __________. #12 If the speed of the propeller is 135 RPM, the speed of the engine camshaft shown in the illustration will be __________. Illustration MO-0003 #13 Which of the following statements would apply when checking the valve clearance of the unit shown in the illustration? Illustration MO-0074 #14 When inspecting the valve mechanism shown in the illustration, normal maintenance would include __________. Illustration MO-0074 #15 After testing your medium-speed engine's exhaust valve springs you find one with a spring constant that is lower than specified by design and a length that is reduced in length from that specified by design. What is the recommended course of action? #16 When a naturally aspirated four-stroke cycle diesel engine is converted for supercharging, which of the following changes must be made to the valve timing? #17 While inspecting diesel engine combustion space components, which components would you consider for particular scrutiny for evidences of high temperature corrosion? #18 The intake and exhaust valves used in a diesel engine are returned to their seats by __________. #19 The valve cam slope angle determines the __________. #20 A four-stroke cycle auxiliary diesel engine fuel cam has shifted from its original position during maintenance. To ensure correct timing of the fuel pump, the intake and exhaust valves should be in what position when approaching top dead center for injection? #21 The pinion of an auxiliary diesel-electric starting motor normally engages the flywheel ring gear by means of a/an __________. #22 In a Bendix starter drive, the pinion engagement with the flywheel ring gear is initiated by __________. #23 Hydraulic starters are installed on many lifeboat diesel engines instead of comparable air start systems, because __________. #24 A pre-arrival test is being performed with the engine on bridge control. The vessel has a slow speed engine with mechanical starting air system (not electronic). After a stop order, the engine fails to restart in the next ahead direction order. What would be your immediate actions to restart the engine, if the order was still ahead? #25 During maneuvering on a slow speed diesel engine vessel, a low starting air system pressure alarm is activated. Local starting air receivers' pressure gauges indicate proper pressures, and compressors are running and are 'loaded' up. What could cause the alarm? #26 Which of the following test indicators should be considered the most significant factor in determining as to whether or not a diesel generator's lube oil should be drained and renewed? #27 Crankcase explosions in propulsion diesel engines result from __________. #28 Which of the following effects will excessively cold lube oil have on the operation of a diesel engine? #29 Lube oil in the fresh water cooling system of a diesel engine may result from a __________. #30 What could cause the bypass valve in a full-flow lubrication system to open?

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