Allied & ICAR Exam Bank • ALLIED_1211 MCQ • 1 Mark

Section 5: Irrigation and Drainage Engineering

Micro-Irrigation Systems

Subtopic: Sprinkler Uniformity

Question Statement:

Christiansen's Uniformity Coefficient ($C_u$) for a sprinkler irrigation test evaluates:

Options:

  • (A) The spatial uniformity of water catch depth in a grid of catch cans across the irrigated area
  • (B) The pump mechanical efficiency
  • (C) The electrical conductivity of irrigation water
  • (D) The rate of pipe friction loss

Answer Key:

A

Step-by-Step Solution & Explanation

Christiansen's formula $C_u = 100 \left(1 - \frac{\sum |x - \bar{x}|}{n \bar{x}}\right)$ measures how evenly catch can depths are distributed across the field relative to the mean catch depth.
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