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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

Cylinders of marine diesel engines are normally cooled by （）.

A.sea water
B.fine mineral oil
C.sanitary water
D.fresh water

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单项选择题

Cylinder liner cooling is often referred to as （）.

A.piston cooling
B.sleeve cooling
C.central cooling
D.jacket cooling

单项选择题

Cross scavenging requires the fitting of （） to prevent air or exhaust gas escape when the piston is at the top of the stroke.

A.a exhaust valve
B.a piston skirt
C.a piston crown
D.an air suction valve

单项选择题

Crankshafts of medium speed engines are （） from a single piece of steel.

A.unusually solid welded
B.never be solid forged
C.almost invariably solid forged
D.almost invariably be welded

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