单项选择题
In the suction stroke air is induced into the cylinder （）In the compression stroke the air is compressed.
A.by an fuel valve
B.through an inlet valve
C.with an exhaust valve
D.from an outlet valve
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相关考题
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单项选择题
In the sentence “In some designs the cylinder oil is timed so that the oil injects only on the piston ring belt, the "piston ring belt" means （）.
A.piston crown
B.piston ring groove
C.piston skirt
D.piston ring area -
单项选择题
In the four-stroke engine, it takes （） to make one power stroke.
A.one propulsion
B.two propulsions
C.two revolutions
D.one revolution -
单项选择题
In the event of the cylinder starting valve leakage （） would pass into the air pipes and ignite the oil deposited.
A.cooling water
B.vapor from the boiler
C.starting air
D.hot gases
