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单选题
If a bilge pump is able to develop vacuum, but is unable to sufficiently pump out the bilges, you would check for all of the following EXCEPT （）.
A
the circuit breaker
B
for leaks in the suction piping
C
relief valve is not properly seated
D
the suction strainer
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单选题The bilge system has been performing well; however, the aft starboard engine room bilgewell suddenly fails to be pumped outWhich of the following should be done first to determine the cause?（）A
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单选题If one of the bilge system manifold valves does not properly seat, the （）A
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考题
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being pumpedC
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考题
单选题One of the consequences in continuing to operate a centrifugal bilge pump with the discharge valve closed, is that the （）.A
motor overload will openB
relief valve will openC
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单选题If an operating bilge pump is developing good vacuum, but is unable to discharge any water, which of the following problems is the most probable cause?（）A
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The suction strainer is cloggedC
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The shaft is worn
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单选题On modern ships, centrifugal pump with a self-primer has replaced reciprocating pump as bilge pump because（）A
centrifugal pump is cheaper than reciprocating pumpB
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centrifugal pump makes maintenance easier than reciprocating pump doesD
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