单项选择题

In a diesel engine, blow-by is a result of combustion gases leaking into the crankcase past the （）

A.wrist pin bushings
B.compression rings
C.cylinder liner seals
D.cylinder liner sealing ring

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单项选择题

A.Gasoline
B.Water
C.Lubricating oil
D.sulphur compounds

单项选择题

A.back clearance
B.side clearance
C.gap clearance
D.taper clearance

单项选择题

A.reduce fuel weight
B.increase specific gravity
C.separate fuel from lube oil
D.reduce fuel viscosity