单项选择题

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 engine
B.two fuel oil transfer pumps, with a combined capacity exceeding the maximum consumption of the main engine
C.engine driven transfer pumps and only used in constant speed applications
D.the capacity of the engine driven pump exceed the consumption rate of the engine to which it is attached

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热门试题

单项选择题In a diesel engine lube oil system, which of the following parts should be lubricated first?（）

A.Camshaft beatings
B.Main bearings
C.Piston crowns
D.Cylinder walls

单项选择题Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.

A.open the bypass line
B.cut in the lube oil cooler
C.pressurize the lube oil system
D.top off the expansion tank

单项选择题The small end of the connecting rod is attached to the piston with a （）.

A.crankpin
B.sliding wedge
C.wrist pin
D.torque bashing

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A.increase
B.decrease
C.fluctuate
D.remain constant

单项选择题A dirty diesel engine oil filter element can best be detected by （）.

A.visual inspection of the elements
B.the pressure drop across the filter
C.high lube oil sump temperature
D.decrease in oil viscosity from the filter