Priming in a pump system refers to which action?

Priming in a pump system refers to which action?

• A. Take away air on the suction side between supply and intake
• B. Increase discharge pressure
• C. Lubricate the impeller shaft
• D. Seal all leaks

Answer: (A)

Priming a pump means removing air from the suction side so the pump and suction line are filled with liquid, creating a continuous liquid column that allows the pump to develop suction from the supply. Air in the suction line breaks that column and prevents the pump from lifting fluid, causing loss of prime. By taking away the air between the supply and the intake, you restore the conditions needed for proper pumping. The other actions don’t achieve priming: increasing discharge pressure doesn’t fill the pump with liquid, lubrication is for wear protection, and sealing leaks is about preventing air or fluid leaks but isn’t the act of priming itself.

Priming a pump means removing air from the suction side so the pump and suction line are filled with liquid, creating a continuous liquid column that allows the pump to develop suction from the supply. Air in the suction line breaks that column and prevents the pump from lifting fluid, causing loss of prime. By taking away the air between the supply and the intake, you restore the conditions needed for proper pumping.

The other actions don’t achieve priming: increasing discharge pressure doesn’t fill the pump with liquid, lubrication is for wear protection, and sealing leaks is about preventing air or fluid leaks but isn’t the act of priming itself.