Allied & ICAR Exam Bank • ALLIED_0565 MCQ • 1 Mark

Section 5: Irrigation and Drainage Engineering

Centrifugal Pumps and Cavitation

Subtopic: Centrifugal Pumps and Cavitation

Question Statement:

Pump shaft brake power input $P$ scales with rotational speed $N$ as:

Options:

  • (A) $P \propto N^3$
  • (B) $P \propto N^2$
  • (C) $P \propto N$
  • (D) $P \propto N^4$

Answer Key:

A

Step-by-Step Solution & Explanation

Power $P = \rho g Q H / \eta \propto (N) \times (N^2) = N^3$.
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