Question Bank • QB_IDE_EXP_097 NAT • 2 Marks

Section 5: Irrigation and Drainage Engineering

Wells and Pumps

Subtopic: Pump characteristics

Question Statement:

A pump delivers power to water at $10\text{ kW}$. If the drive motor delivers $12.5\text{ kW}$ to the pump shaft, calculate the pump mechanical efficiency in percentage.

Answer Key:

80

Step-by-Step Solution & Explanation

$\eta = \frac{\text{Water Power}}{\text{Brake Power}} \times 100 = \frac{10}{12.5} \times 100 = 80.0\%$
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