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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

Pumps and fine filters are arranged （） with one as standby.

A.in duplicate
B.in double
C.at twice
D.for two

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单项选择题

Please draw out a 0l mm shim between the two halves of the bearing （） the clearance.

A.to reduce
B.to increase
C.and reduce
D.and increase

单项选择题

Please draw out a 01 mm （） between the two halves of the bearing to reduce the clearance.

A.shim
B.gasket
C.washer
D.packing

单项选择题

Pistons of marine medium speed diesel engines may be made of （） in order to keep the weight down for balancing purpose at high speed.

A.lead
B.forged steel
C.alloy steel
D.aluminum alloy

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