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單項(xiàng)選擇題

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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單項(xiàng)選擇題

A centrifuge will satisfactorily remove which of the following contaminants from fuel oil?（）

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

單項(xiàng)選擇題

Diesel engine ‘blow-by’ into the crankcase is caused by excessive ring（）

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

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