Allied & ICAR Exam Bank • ALLIED_0539 MCQ • 1 Mark

Section 5: Irrigation and Drainage Engineering

Sprinkler and Micro Irrigation

Subtopic: Sprinkler and Micro Irrigation

Question Statement:

Acid treatment of drip irrigation systems with hydrochloric acid or phosphoric acid is periodically performed to:

Options:

  • (A) Dissolve calcium and magnesium carbonate precipitates that clog emitter orifices
  • (B) Kill beneficial earthworms
  • (C) Increase water pH
  • (D) Corrode polyethylene laterals

Answer Key:

A

Step-by-Step Solution & Explanation

Lowering pH to approx. $2.0-3.0$ with acid dissolves mineral scale (lime deposits) that encrusts tortuous emitter flow paths.
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