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

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单项选择题

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

单项选择题

If water is found in the crankcase of a diesel engine, the cause may be due to（）

A.a cracked cylinder head
B.a leaky cylinder head gasket
C.a cracked cylinder liner
D.any of the above

单项选择题

Following an overhaul of a crosshead type diesel engine, the engine is jacked over with the turning gear as part of the pre-start procedure, which of the listed pre-start procedures should be carried out?（）

A.Ensure proper cylinder lube oil flow
B.Open all air space drain cocks
C.Open all indicator valves
D.all of the above