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单选题
The engine has one or two group of fuel pumps, depending upon （）.
A
the number of fuel valves
B
the number of cylinders
C
the speed of engine
D
the power of engine
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单选题In each cylinder cover there are two or three holes for （）A
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reduce the fuel feeding of main engine of outer propellerC
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use the settler to remove the fuel oilC
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单选题A drop in compression pressure in one cylinder of a diesel engine can be caused by（）A
a leaking fuel injection nozzleB
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early fuel injectionD
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单选题The engine has one or two group of fuel pumps, depending upon （）.A
the number of fuel valvesB
the number of cylindersC
the speed of engineD
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单选题In a diesel engine, when the fuel is injected into the cylinder,（）A
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单选题“The engine not obtaining the sufficient speed for firing” means that （）.A
the start failsB
the fuel pumps will be put into operationC
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camshaftB
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governorD
flywheel
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in doubleC
at twiceD
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The use of engine driven pre-lube pumps is permitted on vessels with propulsion systems developing less than 500 shaft horsepowerC
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单选题One of the differences between a two-stroke engine and a four-stroke engine is,（）A
a two-stroke engine works without exhaust operationB
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考题
单选题（）uses one or two high pressure pumps for all the cylinders with one more standby, while（）have a separate high-pressure pump for each cylinder.A
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A marine diesel engine；most other enginesD
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单选题A common rail engine has only one or two high pressure pumps in operation at the same（）time, and the injection into each cylinder.A
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单选题About the jacket water, that of the auxiliary engines usually（） is circulated by pumps, and the main engine usually （）A
an engine-driven；as wellB
an engine-driven；has an independent pumpC
an independent；as wellD
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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
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单选题Fuel oil transfer systems used onboard diesel propelled vessels are required to have （）.A
two fuel oil transfer pumps provided where one is to be independent of the main engineB
two fuel oil transfer pumps, with a combined capacity exceeding the maximum consumption of the main engineC
engine driven transfer pumps and only used in constant speed applicationsD
the capacity of the engine driven pump exceed the consumption rate of the engine to which it is attached
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单选题Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires（）A
grinding the spare plunger to the barrelB
replacing the plunger and the barrelC
highly polishing both the plunger and barrelD
replacing plunger only
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单选题One of the differences between a two-stroke engine and a four-stroke engine is,（）A
a two-stroke engine can’t work without cylindersB
a two-stroke engine can’t work without pistonsC
a two-stroke engine can’t work without crankshaftsD
a two-stroke engine can’t work without a blower
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