Which is the correct relationship for a centrifugal pump? (Where, D = Impeller diameter, inches H = Head developed, ft of liquid pumped N = Speed of pump, rpm) ?

Question

Accepted Answer

D = 1840 H0.5/N. The relationship for head (H) in a centrifugal pump is proportional to the square of the diameter (D) and the speed (N), often simplified as H ∝ D²N² or similar forms depending on the exact formula used. Option A matches a common form derived from pump laws.