Centrifugal Pump Interview Questions 2 contains questions about Priming in pump, static head in pump, friction head in
pump, Centrifugal pump, High Discharge pump, NPSH for
centrifugal pump, NPSH calculate it for a centrifugal pump, Which pump is more economical than centrifugal
pump?, Positive displacement pumps
Frequently asked questions
11. What is priming?
12. What happens to the pressure at the discharge of the
pump when the flow increases, or when the discharge valve goes from a fully
closed position to fully open?
13. What are the 2 major components of total head?
14. If you increase the total static head what
will happen to the flow?
15. If you
decrease the discharge static head, what will happen to the flow?
16. Why the Centrifugal Pump is called Hi
11. What is priming?
Pump casing must be filled with liquid before the pump is started, or the pump will not be able to function. If the pump casing becomes filled with vapors or gases, the pump impeller becomes gas-bound and incapable of pumping.
12. What happens to the pressure at the discharge of the pump when the flow increases, or when the discharge valve goes from a fully closed position to fully open?
It
decreases.
13. What are the 2 major components of total head?
Static
head and friction head.
14. If you increase the total static head what will happen to the flow?
It will decrease.
16. Why the Centrifugal Pump is called High Discharge pump?Centrifugal pump is a kinetic device.
The centrifugal pump uses the centrifugal force to push out the fluid. So the liquid entering the pump receives kinetic energy from the rotating impeller.
The centrifugal action of the impeller accelerates the liquid to a high velocity, transferring mechanical (rotational) energy to the liquid. So it discharges the liquid in high rate.
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