Allied & ICAR Exam Bank • ALLIED_0558 NAT • 2 Marks

Section 5: Irrigation and Drainage Engineering

Groundwater Wells and Pumps

Subtopic: Groundwater Wells and Pumps

Question Statement:

In a tubewell, aquifer loss is $B Q = 1.6\text{ m}$ and well entry loss is $C Q^2 = 0.4\text{ m}$ (total drawdown $s_w = 2.0\text{ m}$). The well efficiency in percent is:

Answer Key:

80

Step-by-Step Solution & Explanation

$E_w = (1.6 / 2.0) \times 100 = 80.0\%$.
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