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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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reduce the fuel feeding of main engine of outer propellerC
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单选题A drop in compression pressure in one cylinder of a diesel engine can be caused by（）A
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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
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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
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单选题One of the differences between a two-stroke engine and a four-stroke engine is,（）A
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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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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
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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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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
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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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