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全部科目 > 水路交通运输技能考试 > 海船船员考试 > 船舶管理(轮机专业) > 轮机英语 > 船舶电气与船舶安全

单项选择题

The plunger is machined to very fine tolerances, as is the matched（）in which it reciprocates.

A.barrel
B.ram
C.piston
D.rod

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单项选择题
It should be evident that the amount of fuel injected into the cylinder is dependent on the position of the helix relative to the （）.

A.inlet port
B.exhaust port
C.spill port
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单项选择题
As the plunger moves upwards in the barrel, injection will commence once the plunger has （） the spill ports and the pressure builds up.

A.opened up
B.closed off
C.lined up
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单项选择题
It is important to note that the injection only takes place when the plunger is moving up the cam （）.

A.base circle
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