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單項選擇題

The term （） refers to one complete sequence of operations required to produce power in an engine.

A.diesel engine
B.stroke
C.cycle
D.compression ratio

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單項選擇題

The supercharger takes air out of the surrounding atmosphere and then feeds it to the engine’s （）.

A.inlet valves
B.exhaust valves
C.emergency valves
D.run-return valves

單項選擇題

The successful operation of any engine or machine and （） depend on effective lubrication.

A.their no trouble period
B.their freely trouble period
C.its free trouble life
D.its trouble-free life

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