Before starting the centrifugal pumps, usually they require priming. Priming is the process of
- Aremoving the trapped air from the pump
- Bremoving the trapped air from the pump and filling it completely with waterCorrect
- Clubricating the motor of the pump with oil
- Dadjusting the electric current flow for getting the desired rotational speed of the pump
Solution
Concept
Priming
Step-by-step solution
1. Priming removes the air from the suction pipe and casing and fills them with water so that the pump can build suction pressure.
Explanation
A pump full of air cannot create enough pressure difference.
Why the other options are wrong
A is incomplete; C and D are unrelated.
Shortcut
Priming = remove air + fill with water.
Correct answer: B) removing the trapped air from the pump and filling it completely with water