Allied & ICAR Exam Bank • ALLIED_1227 NAT • 2 Marks

Section 5: Irrigation and Drainage Engineering

Micro-Irrigation Systems

Subtopic: Lateral Friction Loss

Question Statement:

In a drip irrigation lateral pipe with multiple equally spaced emitters, the total friction head loss without outlets would be $H_f = 2.4\text{ m}$. Using Christiansen's multiple outlet reduction factor $F = 0.36$ for a large number of outlets, the actual friction head loss in the lateral pipe in meters is:

Answer Key:

0.86

Step-by-Step Solution & Explanation

$H_{f,actual} = F \times H_f = 0.36 \times 2.4\text{ m} = 0.864\text{ m}$.
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