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單項(xiàng)選擇題

A magnetic strainer is used in the diesel engine reduction gear oil system to remove small particles of（）.

A.water
B.babbitt
C.iron or steel
D.acids

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單項(xiàng)選擇題

Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?（）

A.Impurities
B.Lube oil
C.Gasoline
D.Diesel fuel

單項(xiàng)選擇題

The most common contaminate of governor hydraulic fluid is （）.

A.moisture
B.dirt
C.acid
D.air