Question Bank • QB_SWCE_EXP_036 MCQ • 1 Mark

Section 4: Soil and Water Conservation Engineering

Soil and Water Erosion

Subtopic: Gully control structures – drop, drop inlet and chute spillways

Question Statement:

A straight drop spillway is most economically and structurally suited for drops up to:

Options:

  • (A) $3\text{ m}$
  • (B) $8\text{ m}$
  • (C) $15\text{ m}$
  • (D) $25\text{ m}$

Answer Key:

A

Step-by-Step Solution & Explanation

Drop spillways are structural spillways used for low drop heads, typically up to $3\text{ m}$ (rarely exceeding $4\text{ m}$). For higher drops ($3\text{ m}$ to $6\text{ m}$), chute spillways or drop inlet pipe spillways are preferred.
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