单项选择题

On board supply vessels, a centrifuge is normally used to purify（）

A.cooling water
B.fuel oil
C.sea water
D.diesel intake air

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单项选择题

Water accumulating in the crankcase of a diesel engine could indicate（）

A.a cracked cylinder liner
B.excessive water in the fuel
C.a leaking intercooler
D.excessive moisture in the scavenge air

单项选择题

The device used to store a charged pressure for a hydraulic starting system is called the（）

A.reservoir
B.hand pump
C.accelerator
D.accumulator

单项选择题

How dose water enter the crankcase of a diesel engine?（）

A.Through the crankcase exhauster
B.As water vapor contained in blow-by
C.Demulsifying lube oil passing through the main bearings
D.Condensation from vapor formed in the expansion tank