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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
The wearing rings are excessively worn
B
The suction strainer is clogged
C
The discharge valve is clogged
D
The shaft is worn
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更多 “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 The wearing rings are excessively wornB The suction strainer is cloggedC The discharge valve is cloggedD The shaft is worn” 相关考题
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单选题A centrifugal bilge pump requires priming （）.A
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单选题During the PSC inspection, under the provisions of SOLAS 74, which one may not be regarded as clear grounds for ships’ detainment?（）A
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考题
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produces pressureB
imparts energy to a fluid to move it from level ‘A’ to level ‘B’C
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a clogged suction strainerC
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考题
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the circuit breakerB
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the suction strainer
考题
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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
pump will overheatD
motor will overheat
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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
the size of centrifugal pump with same capacity is smaller than that of reciprocating pumpC
centrifugal pump makes maintenance easier than reciprocating pump doesD
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