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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

Oil water separators are used to ensure that ships dont discharge oil when pumping out （）.

A.ballast water
B.boiler water
C.bilge water
D.sewage water

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单项选择题

（）are used to ensure that ships don’t discharge oil when pumping out oily water from any oil contaminated space.

A.Boiler
B.Incinerator
C.Oily water separator
D.Sewage treatment unit

单项选择题

High-speed rotation in a centrifugal purifier can produce a force （） the force of gravity.

A.many thousand times larger than
B.the same as
C.many thousand times smaller
D.none of the above

单项选择题

The separation of impurities and water from （） is essential for good combustion of diesel engines.

A.lube oil
B.fuel oil
C.turbine oil
D.grease

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