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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

A high rate of separation between oil and water is favored by （）.

A.large size of oil globule
B.low temperature
C.high viscosity
D.high flow rate

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单项选择题

When started, a complete oily water separating unit is first filled （）The oily water mixture is then pumped through the inlet pipe into the coarse separating compartment.

A.with dirty water
B.with clean water
C.by oily water
D.by mixed water

单项选择题

In an oily water separator the oil will travel （） to the oil collecting spaces.

A.upwards
B.downwards
C.outwards
D.forwards

单项选择题

For a purifier changing to a gravity disc with smaller hole diameter will move the interface towards the（）.

A.bowl periphery
B.bowl center
C.upper surface
D.lower surface

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