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单选题
A supercharged diesel engine when compared to a similar naturally aspirated diesel engine, will develop an increase in （）
A
ignition lag
B
engine horsepower
C
lube oil system pressure
D
specific fuel consumption
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in whichB
on whichC
at whichD
in that
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单选题A diesel engine is supercharged in order to（）A
lower the no-load RPMsB
provide more air for combine with the fuelC
increase the no-load RPMsD
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caused by retarded injection timingB
caused by a mechanical defect in one cylinderC
caused by high fuel injection pressuresD
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pumping action of the pistonB
pressure of the fuel chargeC
vacuum developed in the manifoldD
pressure of the fresh air charge
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单选题When a diesel engine is operate at partial load, as compared to full load ,a decrease will occur in the average （）A
air quantity aspiratedB
fuel injection pressureC
combustion pressure on the power strokeD
compression on the compression stroke
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starting air pressureB
scavenge air pressureC
over-speed tripD
banjo oiler line
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单选题When the general alarm is sounded continuously, the engine room personnel should （）.A
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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Trunk type diesel engine pistons are effectively cooled when heat is（）A
radiated through the engine blockB
transferred to water cooled cylinder wallsC
conducted through the piston crownD
transferred to escaping exhaust gases
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单选题The difference between a supercharged engine and an un-supercharged engine is that （）.A
the laterB
the latterC
the formerD
the farmer
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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 diesel engine is similar to the gasoline engine in that （）.A
both of them are ignited by compressed airB
both of them are the forms of external combustion enginesC
both of them have spark plugsD
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考题
单选题In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?（）A
Bed plateB
ColumnC
EntablatureD
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单选题Which of the following statements is true regarding the installation of piston rings on two-stroke/cycle, diesel engines as compared to four-stroke/cycle, diesel engines?（）A
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Some provision must be made in a two-stroke/cycle engine to keep the rings from binding in the portsC
No gap is required to exist between the ends of the ring when cold in a two-stroke/cycle engine, but a small gap is required in a four-stoke/cycle engineD
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单选题Some diesel engines are supercharged with a （）A
slam chargerB
turbochargerC
fuel atomizerD
fuel injector
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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
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cylinder exhaust portsB
injection lineC
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banjo oiler line
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water accumulation in some engine cylindersC
low starting air pressureD
low scavenge air pressure
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单选题In a diesel engine, when installing new piston rings it is important to check（） Ⅰ.ring gap clearance Ⅱ.side clearanceA
Ⅰ onlyB
Ⅱ onlyC
both Ⅰ and ⅡD
neither Ⅰnor Ⅱ
考题
单选题When installing rings on a diesel engine piston, you should check the ring（）A
diametrical tensionB
gap clearanceC
radial thicknessD
face thickness
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单选题When the load is increased on a turbocharged diesel engine, the amount of increased air supplied by the turbocharger will（）A
lag behind the increased fuel supplied to the engineB
enter the engine along with the increase in the fuelC
enter the engine before the increased fuel supplyD
leave the turbocharger as a negative pulse
考题
单选题For a diesel engine, when the piston is at the （）, the clearance volume is the largest.A
TDCB
DTCC
BDCD
DBC
考题
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
reduced blow-by
考题
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
increasing the efficiency of propellerD
increasing fuel injection
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