Pick up the incorrect statement for centrifugal pumps
- A. Discharge $\propto$ diameter
- B. Head $\propto$ (speed)$^2$
- C. Head $\propto$ (diameter)$^2$
- D. Discharge $\propto$ speed
Answer: A. Discharge $\propto$ diameter
Explanation: For geometrically similar pumps, Discharge $Q \propto N D³$. Thus $Q \propto D³$, not $D$ linearly. $H \propto N² D²$.