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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 > 船舶动力装置

单项选择题

For an ordinary four-stroke engine the exhaust valves open （）.

A.after TDC
B.before TDC
C.after BDC
D.before BDC

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单项选择题

For an ordinary four-stroke diesel engine the exhaust valves close （）.

A.after TDC
B.before TDC
C.after BDC
D.before BDC

单项选择题

For a main diesel engine the lube oil in the bearings is drawn from （）, usually located in the bedplate.

A.a gravity tank
B.a sump
C.a vessel
D.a bottle

单项选择题

For a generator engine, after passing through the turbine the exhaust gas may be conducted out into the （）.

A.intercooler
B.open air
C.oil fired boiler
D.B and C

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