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單項(xiàng)選擇題

Pressurized air enters the cylinder via the inlet ports and pushes the remaining exhaust gas from the cylinder in a process known as “（）”.

A.charging
B.super charging
C.scavenging
D.exhausting

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單項(xiàng)選擇題

It is during （） that work energy is being put into the engine; during the other 3 strokes of the piston, the engine is having to do the work.

A.the suction stroke
B.the compression stroke
C.the expansion stroke
D.the exhaust stroke

單項(xiàng)選擇題

In the suction stroke, the crankshaft is rotating clockwise and the piston is moving （） the cylinderThe inlet valve is （） and a fresh charge of air is being drawn or pushed into the cylinder by the turbocharger.

A.up；opened
B.down；open
C.up；closed
D.down；closed