The main purpose of pump priming is to:

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Multiple Choice

The main purpose of pump priming is to:

Explanation:
Priming a pump aims to remove the air inside the pump and suction line and replace it with water, creating a continuous liquid column that the pump can move. If air remains, the pump can’t develop the suction needed to draw in water, so it won’t start pumping. By filling the pump with liquid, you enable the impeller to push water through the system rather than trying to push air. This is why replacing air with water inside the pump is the best description of the main purpose. Wetting packing or ensuring the pump “operates freely” aren’t the defining actions of priming, and compressing air would work against the goal of creating suction.

Priming a pump aims to remove the air inside the pump and suction line and replace it with water, creating a continuous liquid column that the pump can move. If air remains, the pump can’t develop the suction needed to draw in water, so it won’t start pumping. By filling the pump with liquid, you enable the impeller to push water through the system rather than trying to push air. This is why replacing air with water inside the pump is the best description of the main purpose. Wetting packing or ensuring the pump “operates freely” aren’t the defining actions of priming, and compressing air would work against the goal of creating suction.

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