If you heard a ‘crackling’ noise in centrifugal pump, the most probable cause of the problem would be（）<br>A:insufficient speed<br>B:cavitation<br>C:excess discharge pressure<br>D:excessive net positive suction head B

If you heard a ‘crackling’ noise in centrifugal pump, the most probable cause of the problem would be（）
A:insufficient speed
B:cavitation
C:excess discharge pressure
D:excessive net positive suction head B

出自：海船船员证

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