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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

Four strokes consist of suction, compression, （） and exhaust stroke.

A.combustion
B.condensation
C.charging
D.evaporation

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单项选择题

For one or two types of engine,the piston and rod can be withdrawn downwards from the cylinder into the crankcase and then out through （）.

A.the cylinder cover
B.the bottom of bed-plate
C.the sump
D.the crankcase door

单项选择题

For one or two types of engine, the piston and rod can be withdrawn downwards from the cylinder into the crankcase and then out through the （）.

A.cylinder casing
B.cylinder bore
C.crankcase door
D.aperture in the cylinder block

单项选择题

For an ordinary modem marine four-stroke engine the inlet valves close （）.

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

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