Answer / ram sharma

in positive displacement pumps pressure is developed due to displacament of piston where as in centrifugal pump pressure is developed due to rotation of impeller

Answer / hameedwahab

Centrifugal Pumps are Flow oriented.
Positive displacement pumps are Pressure oriented.

Answer / kunal kolapkar

Firstly centrifugal pump is -ve displacement pump I.e.pressure & discharge is varry but in +ve displacement pump delivery pump meance discharge is constant in + ve displacement pump

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