General Subjects (Auxiliaries & Systems) USCG Question #1243 (Set 19)

One of the consequences in continuing to operate a centrifugal bilge pump with the discharge valve closed, is that the __________.

Official USCG Answer & Rule Citation

Correct Answer: Option A — pump will overheat

Centrifugal pumps rely on the pumped fluid to dissipate heat generated by the impeller's rotation. With the discharge valve closed, the fluid recirculates within the casing, absorbing energy until it reaches temperatures that can damage internal components, seals, and the pump casing itself.

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