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單項(xiàng)選擇題

Friction, engine wear and oil consumption in a diesel engine are directly related to the （）.

A.acidity of the oil
B.pour point of the oil
C.flash point of the oil
D.viscosity of the oil

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單項(xiàng)選擇題

Two important considerations for the proper lubrication of a diesel engine include the delivery of the oil in sufficient amount and the （）.

A.cetane number
B.pour point
C.viscosity temperature
D.quality of the oil

單項(xiàng)選擇題

In a naturally aspirated diesel engine, the volume of air intake is directly related to engine （）.

A.compression ratio
B.valve size
C.fuel pressure
D.cylinder clearance volume

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