单项选择题
The pump has a constant stroke and the amount of fuel delivered is regulated by rotating （） which has a specially arranged helical groove cut into it.
A.the pump cylinder
B.the pump cam
C.the pump plunger
D.the pump miler
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相关考题
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单项选择题
The projection on a shaft designed to change circular motion into up and down or back and fore motion is called （）.
A.wheel
B.crankshaft
C.running gear
D.cam -
单项选择题
The process to remove exhaust gases by blowing in fresh air is called （）.
A.charging
B.supercharging
C.starting
D.scavenging -
单项选择题
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
