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單項(xiàng)選擇題

If the cooling water temperature and the lube oil temperature in a diesel engine are too high, the cause can be （）

A.a dirty lube oil strainer
B.internal water leaks
C.an oil suction line restriction
D.excessive wears of the cooling water pump

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單項(xiàng)選擇題

The reversing cams of some four-stroke/cycle diesel engines are brought into position by （）

A.sliding the camshaft along its axis
B.rotating the cam 180
C.rotating the cam followers 180
D.moving the idler sprockets in the drive chain

單項(xiàng)選擇題

A diesel engine is equipped with an isochronous hydraulic governorA decrease in load will cause the engine speed to （）

A.decrease only
B.increase only
C.decrease slightly then returned to original speed
D.increase slightly then returned to original speed

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