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單項選擇題

The two-stroke cycle begins with the piston coming up from the bottom of its stroke, with scavenge ports in the sides of the cylinder being （）.

A.shut
B.closing
C.opened
D.closed

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單項選擇題

The term medium speed diesel engine is currently taken to mean an engine with an operating rotational speed of （） rpm.

A.below 300
B.above 1200
C.between 300 to 1200
D.below 1200

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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