Excessive air leakage into the suction side of a centrifugal pump would be indicated by which of the following operational problems?

Correct Answer: Option C — The pump delivers full capacity when started, but gradually slackens off to an abnormally low flow.

Under USCG National Maritime Center examination standards, the accepted correct answer is: The pump delivers full capacity when started, but gradually slackens off to an abnormally low flow..