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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

In motorships，there are two main circuits, （）.

A.one salt water, one fresh water
B.one salt water, one fuel
C.one fresh water, one fuel
D.one steam, one fuel

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单项选择题

Auxiliary machinery covers everything onboard except （）.

A.main engines
B.main boilers
C.pipes and fittings
D.A and B

单项选择题

A （）, sometimes called filters, is a device designed to prevent the passage of unwanted solids into the system.

A.steam trap
B.check valve
C.separator
D.strainer

单项选择题

To maintain the down stream pressure within defined limits over a range of flow and despite any changes in supply pressure, （） is fitted.

A.a check valve
B.a gate valve
C.a pressure reducing valve
D.a quick closing valve

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