What is the correct interpretation of a centrifugal pump being fully primed?

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Multiple Choice

What is the correct interpretation of a centrifugal pump being fully primed?

Explanation:
In this context, priming a centrifugal pump means filling the pump and the suction line with liquid so there are no air pockets to disrupt suction. When fully primed, the pump is literally full of liquid, which allows the impeller’s rotation to develop flow and draw liquid from the source to the discharge. The pump being primed is not about the impeller turning by itself—that's a separate operating condition—nor is it about the discharge valve status. A blocked suction line would prevent priming because air couldn’t be expelled.

In this context, priming a centrifugal pump means filling the pump and the suction line with liquid so there are no air pockets to disrupt suction. When fully primed, the pump is literally full of liquid, which allows the impeller’s rotation to develop flow and draw liquid from the source to the discharge. The pump being primed is not about the impeller turning by itself—that's a separate operating condition—nor is it about the discharge valve status. A blocked suction line would prevent priming because air couldn’t be expelled.

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