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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 > 船舶辅助机械

单项选择题

（） will be used to blow away the combustion products from the tube surfaces.

A.The blow down valve
B.The scum valve
C.The air release cock
D.The soot-blower

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单项选择题

In motor ship, （） is often used to recover some of the heat carried in the exhaust gases from the main engine.

A.an diesel oil heater
B.a waste heat boiler
C.a fresh water generator
D.all the above

单项选择题

Impurities from the boiler water surface can be removed through the （）.

A.safety valve
B.blow down valve
C.scum valve
D.feed check valve

单项选择题

You should frequently compare drum-mounted and remote-reading water level indicators（） between these have contributed to failures because of overheating through shortage of water, when a boiler was being oil-fired.

A.descriptions
B.discrepancies
C.different
D.deflections

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