Allied & ICAR Exam Bank • ALLIED_0570 NAT • 2 Marks

Section 5: Irrigation and Drainage Engineering

Centrifugal Pumps and Cavitation

Subtopic: Centrifugal Pumps and Cavitation

Question Statement:

A centrifugal pump lifts $Q = 50\text{ L/s}$ ($0.05\text{ m}^3/\text{s}$) against a total dynamic head $H = 20\text{ m}$. Density of water is $1000\text{ kg/m}^3$ and $g = 9.81\text{ m/s}^2$. Water horsepower (hydraulic power output $P_h = \rho g Q H$) in kW is (rounded off to two decimal places):

Answer Key:

9.81

Step-by-Step Solution & Explanation

$P_h = 1000 \times 9.81 \times 0.05 \times 20 = 9810\text{ W} = 9.81\text{ kW}$.
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