Question Bank • QB_EXP_SWCE_ENR_028 MCQ • 1 Mark

Section 4: Soil and Water Conservation Engineering

Specific Energy, Critical Flow & Hydraulic Jump

Subtopic: Specific energy and critical flow

Question Statement:

In the specific energy diagram, the ratio of critical depth $y_c$ to minimum specific energy $E_{\text{min}}$ in a rectangular open channel is strictly equal to:

Options:

  • (A) 2/3
  • (B) 1/2
  • (C) 3/4
  • (D) 4/5

Answer Key:

A

Step-by-Step Solution & Explanation

For rectangular channel, $E_{\text{min}} = \frac{3}{2} y_c \implies \frac{y_c}{E_{\text{min}}} = \frac{2}{3}$.
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