SC Air Conditioning Practice Questions - South Carolina Air Conditioning Contractor Examination Exam

A chilled-water circulating pump that loses prime and sounds like gravel is most likely experiencing:

Cavitation from insufficient net positive suction head An oversized impeller that is producing too little head A closed balancing valve on the discharge only A failed check valve that is stuck open on a single pump

Correct Answer:

Cavitation from insufficient net positive suction head

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