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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

Top piston rings are plasma coatedIt gives added safety for the of new lines（）

A.running-in
B.running-out
C.running on
D.running down

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单项选择题

For auxiliary engines the permissible overload is （） for one hour every twelve hours.

A.10%
B.15%
C.20%
D.25%

单项选择题

The scavenge air receiver is of a simplified and modular design with integral non-return flaps, hanging cooler and two auxiliary air blowers（）

A.dozens
B.parcels
C.bundles
D.gallons

单项选择题

The piston crown employs the usual jet-shaker principle with an arrangement of cooling bores in the crown so that the surface temperatures of the crown are moderate with a very even distribution（）

A.water cooling
B.oil cooling
C.air cooling
D.combined cooling

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