单项选择题
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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相关考题
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单项选择题
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 -
单项选择题
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 -
单项选择题
The four-stroke cycle is so called because it takes （） to complete the processes needed to convert the energy in the fuel into work.
A.two strokes of the piston
B.four strokes of the piston
C.one revolution of the crankshaft
D.four revolutions of the crankshaft
