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單項選擇題

In an ordinary diesel engine the fuel injection begins （）

A.after TDC
B.before TDC
C.after BDC
D.before BDC

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單項選擇題

In an oil cooler circulated by sea water, the oil is at a larger pressure, the result being that any leak in the cooler will mean a loss of （）.

A.oil
B.sea water
C.refrigerant
D.fresh water

單項選擇題

In a four-stroke engine the camshaft rotates at （）.

A.half the engine speed
B.twice the engine speed
C.the engine speed
D.four times the engine speed

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