单选题The ship has a diesel engine()a supercharger.AwithBofConDover

单选题
The ship has a diesel engine()a supercharger.
A

with

B

of

C

on

D

over


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单选题A decrease in the flash point of diesel engine lube oil indicates the lube oil has become ().Acontaminated with sludgeBcontaminated with carbonCdiluted with fuel oilDdiluted with water

单选题Mechanical lubricators for diesel engine cylinders are usually small reciprocating pumps which are ().Aoperated manually once an hourBoperated until the engine has startedCplaced into operation only at maximum loadDadjustable to meet lubrication requirements

单选题Leaking oil seals on a diesel engine turbocharger can cause()Athe engine to run after the fuel has been securedBthe engine to over-speedCa fireDall of the above

单选题Why the cooling water of the diesel engine should be treated? Because the()ACooling water is alkalescenceBcooling water is acidityCcooling water has salinityDcooling water has impurity

单选题Which of the diesel engine cylinder liners listed has internal cooling water passages?()AInternally finned linerBExternally finned linerCWet linerDIntegral water-jacket liner

单选题Before starting a diesel engine that has an engine driven lube oil pump, the engineer should ().Aopen the bypass lineBcut in the lube oil coolerCpressurize the lube oil systemDtop off the expansion tank

单选题The diesel engine consumes considerably less fuel than the steam engine for equal output, () enables a motor-ship to load more cargo.AwhyBwhichCin whichDon which

单选题On a ship,the possibility of a blowout makes which type of diesel engine shutdown desirable?()AOverspeed tripBAir inlet shut-off valveCWater injectorDFuel cutoff valve

单选题As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?()AExhaust temperaturesBRaw water pressureCLube oil pressureDAir box pressure

单选题Why a gearbox is needed in a ship driven by a medium-speed diesel engine?()ATo reduce the main engine speedBTo increase the main engine speedCTo govern the main engine speedDTo fix the propeller shaft

单选题When the general alarm is sounded continuously, the engine room personnel should ().Aproceed to their man overboard stationsBstart the fire pumpCput on lifejackets and go to their abandon ship stationsDsecure the propulsion diesel engines and evacuate the engine room

单选题The load limitation of governor should be reduced when ship navigating at sea, the main reason is to()Aprevent the diesel engine surgingBprevent governor from being damaged because of swingCreduce the probability of the crank shaft being torsional vibrated and resonatedDprevent the main engine being overload or overspeed

单选题A diesel engine is similar to a gasoline engine except that the former has no ().Across-headBcylinderCconnecting rodDspark plug

单选题The cooling water of the diesel engine should be treated, because it has()Aalkale scenceBacidityCsalinityDimpurity

单选题In motor ship, () is often used to recover some of the heat carried in the exhaust gases from the main engine.Aan diesel oil heaterBa waste heat boilerCa fresh water generatorDall the above

单选题If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase()Ainspection covers should not be opened until the engine has cooledBventilation system should be continued in operation for one hour for coolingCscavenge pump should be immediately secured to prevent loss of lube oilDexplosion covers should be opened slightly to provide extra ventilation

单选题When used with reversing reduction gears, medium-speed diesel engines should be bolted to their foundations with fitted bolts at the drive end and clearance(loosely fitted) bolts in other locations √This is done to ()Amaintain alignment when the ship’s hull is working in heavy seasBensure engine vibrations correspond to the natural frequency of the hullCpermit the engine to expand away from the driven equipment as the engine heats up and expandsDmaintain engine thrust bearing clearances

单选题For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because ().Ait has a longer power strokeBmore air gets into the cylinder each strokeCit develops twice as many power strokes at the same speedDhigher combustion pressure is developed

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单选题Which of the following adjustments is always required whenever the diesel engine governor oil has been drained and renewed?()Aspeed droopBcompensationCidle speed settingDload limit control

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单选题A turbocharged, four-stroke/cycle diesel engine has a larger valve overlap than a naturally aspirated four-stroke/cycle diesel engine, in order to in crease the ().Atemperature of the exhaust gasesBenergy supplied to the turbochargerCair pressure to the intake manifoldDpurge of exhausted gases from the cylinders

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