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单选题
The （）pump is usually used as the bilge feed pump to an oily water separator.
A
turbine
B
screw
C
vane
D
ejector
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考题
单选题Oil water separators are used to ensure that ships don’t discharge oil when （） bilge water.A
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centrifugal pump is cheaper than reciprocating pumpB
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centrifugal pump makes maintenance easier than reciprocating pump doesD
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单选题If the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler, the cause maybe （）.A
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abnormally high feed water temperatureC
abnormally high boiler water temperatureD
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单选题The （）pump is usually used as the lubricating oil pump.A
turbineB
screwC
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centrifugal
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