Allied & ICAR Exam Bank • ALLIED_0563 MCQ • 1 Mark

Section 5: Irrigation and Drainage Engineering

Centrifugal Pumps and Cavitation

Subtopic: Centrifugal Pumps and Cavitation

Question Statement:

According to pump affinity laws, how does pump developed head $H$ vary with rotational speed $N$ for a given impeller diameter?

Options:

  • (A) $H \propto N^2$
  • (B) $H \propto N$
  • (C) $H \propto N^3$
  • (D) $H \propto \sqrt{N}$

Answer Key:

A

Step-by-Step Solution & Explanation

From centrifugal Euler head equation, velocity triangles scale with $N$, so $H \propto v^2 \propto N^2$.
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