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Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)

Q = π.D.Vf
Q = π.b.Vf
Q = π.D.b.Vf
Q = D.b.Vf

Correct Answer: Q = π.D.b.Vf

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