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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

Strainers, sometimes called （）, are devices designed to prevent the passage of unwanted solids into or further along a system.

A.dampers
B.filters
C.stopper circuits
D.separators

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单项选择题

A(n) （） is a special type of valve which prevents the passage of steam but allows condensate to pass.

A.check valve
B.non-return valve
C.steam trap
D.quick closing trap

单项选择题

Fuel oil tanks must be fitted with （） that can be closed rapidly and remotely in the event of an emergency such as a fire.

A.stop valves
B.non-return valves
C.quick closing valves
D.relief valves

单项选择题

A more sophisticated pressure reducing valve incorporates a pilot valve which controls the fluid above the valve operating piston in response to downstream pressureThe bold and italic word “which” means （）.

A.a pressure reducing valve
B.a pilot valve
C.an operating piston
D.downstream pressure

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