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

Correct Answer: Option D — pump will overheat

Centrifugal pumps rely on the fluid being pumped to dissipate the heat generated by the impeller's friction and churning. Operating with a closed discharge valve causes the fluid to recirculate within the casing, rapidly increasing the temperature, which can damage seals, bearings, and the pump casing itself.