單項(xiàng)選擇題The most effective method in removing water from diesel fuel oil is by（）

A.centrifuging the fuel
B.using it in the engine
C.heating the fuel tanks
D.starting the fuel


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1.單項(xiàng)選擇題On board supply vessels, a centrifuge is normally used to purify（）

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

2.單項(xiàng)選擇題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

3.單項(xiàng)選擇題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

4.單項(xiàng)選擇題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

5.單項(xiàng)選擇題Standby or emergency diesel generator day tanks should always be kept full to reduce the possibility of（）

A.sediment contamination
B.fuel filter clogging
C.moisture formation
D.inadequate transfer pump suction head