单项选择题
To receive oil residues from the purification of fuel and lubricating oils in the machinery spaces, what kind of tank(s) should be provided on board?（）
A.bilge tank
B.sludge tank
C.overflow tank
D.oil collecting tank
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相关考题
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Which cause of following will not lead to refrigeration plant short-cycle?（）
A.lack of refrigerant
B.refrigerant with much water
C.set defectively low pressure relay
D.no cooling water -
单项选择题
On modern ships, centrifugal pump with a self-primer has replaced reciprocating pump as bilge pump because（）
A.centrifugal pump is cheaper than reciprocating pump
B.the size of centrifugal pump with same capacity is smaller than that of reciprocating pump
C.centrifugal pump makes maintenance easier than reciprocating pump does
D.all of the above -
单项选择题
When a sudden increase in steam demand occurs from the boiler, the water level in the drum at the higher pressure will（）
A.rise quickly
B.rise slowly
C.drop quickly
D.drop slowly
