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單項選擇題

The process to remove exhaust gases by blowing in fresh air is called （）.

A.charging
B.supercharging
C.starting
D.scavenging

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單項選擇題

The process of loop scavenge is that the exhaust will be via ports （） the air ports and controlled by the same piston.

A.behind
B.far from
C.adjacent to
D.in front of

單項選擇題

The primary duty of lube oil is to reduce （） between the working parts of an engine.

A.power output
B.friction and wear
C.indicated pressure
D.rated horsepower

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