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单选题
The ship has a diesel engine()a supercharger.
A
with
B
of
C
on
D
over
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contaminated with sludgeB
contaminated with carbonC
diluted with fuel oilD
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单选题Mechanical lubricators for diesel engine cylinders are usually small reciprocating pumps which are ().A
operated manually once an hourB
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placed into operation only at maximum loadD
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the engine to run after the fuel has been securedB
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单选题Why the cooling water of the diesel engine should be treated? Because the()A
Cooling water is alkalescenceB
cooling water is acidityC
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单选题Which of the diesel engine cylinder liners listed has internal cooling water passages?()A
Internally finned linerB
Externally finned linerC
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单选题Before starting a diesel engine that has an engine driven lube oil pump, the engineer should ().A
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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.A
whyB
whichC
in whichD
on which
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单选题On a ship,the possibility of a blowout makes which type of diesel engine shutdown desirable?()A
Overspeed tripB
Air inlet shut-off valveC
Water injectorD
Fuel cutoff valve
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单选题As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?()A
Exhaust temperaturesB
Raw water pressureC
Lube oil pressureD
Air box pressure
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单选题Why a gearbox is needed in a ship driven by a medium-speed diesel engine?()A
To reduce the main engine speedB
To increase the main engine speedC
To govern the main engine speedD
To fix the propeller shaft
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单选题When the general alarm is sounded continuously, the engine room personnel should ().A
proceed to their man overboard stationsB
start the fire pumpC
put on lifejackets and go to their abandon ship stationsD
secure the propulsion diesel engines and evacuate the engine room
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单选题The load limitation of governor should be reduced when ship navigating at sea, the main reason is to()A
prevent the diesel engine surgingB
prevent governor from being damaged because of swingC
reduce the probability of the crank shaft being torsional vibrated and resonatedD
prevent the main engine being overload or overspeed
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单选题A diesel engine is similar to a gasoline engine except that the former has no ().A
cross-headB
cylinderC
connecting rodD
spark plug
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单选题The cooling water of the diesel engine should be treated, because it has()A
alkale scenceB
acidityC
salinityD
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单选题In motor ship, () is often used to recover some of the heat carried in the exhaust gases from the main engine.A
an diesel oil heaterB
a waste heat boilerC
a fresh water generatorD
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单选题If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase()A
inspection covers should not be opened until the engine has cooledB
ventilation system should be continued in operation for one hour for coolingC
scavenge pump should be immediately secured to prevent loss of lube oilD
explosion covers should be opened slightly to provide extra ventilation
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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 ()A
maintain alignment when the ship’s hull is working in heavy seasB
ensure engine vibrations correspond to the natural frequency of the hullC
permit the engine to expand away from the driven equipment as the engine heats up and expandsD
maintain engine thrust bearing clearances
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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 ().A
it has a longer power strokeB
more air gets into the cylinder each strokeC
it develops twice as many power strokes at the same speedD
higher combustion pressure is developed
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单选题If the chemical analysis of a lube oil sample taken from a diesel engine indicates an increased neutralization number, the ().A
acidity has increasedB
viscosity has decreasedC
demulsibility has improvedD
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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?()A
speed droopB
compensationC
idle speed settingD
load limit control
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单选题When restarting a heavy fuel diesel engine that has been stopped for some time, the engine should()A
increase the starting air pressureB
use a higher than normal cranking speedC
increase the fuel injection pressureD
use a fuel having a lower ignition temperature
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单选题Which of the factors listed has the greatest effect on the mechanical efficiency of a diesel engine?()A
temperature of the intake airB
friction within the engineC
mechanical condition of the superchargerD
mechanical condition of the turbocharger
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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 ().A
temperature of the exhaust gasesB
energy supplied to the turbochargerC
air pressure to the intake manifoldD
purge of exhausted gases from the cylinders
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单选题Compared to a naturally aspirated diesel engine, a supercharged diesel engine has()A
a cylinder air charge of higher pressureB
increased pumping lossesC
less valve overlapD
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单选题When ship navigating in rough sea, the correct operation is ()A
navigating with a low diesel engine speedB
navigating with a stable diesel engine speedC
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单选题Constant cooling the various components of diesel engine has a number of functions except for ().A
good lubricationB
low thermal stressC
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