Allied & ICAR Exam Bank • ALLIED_0384 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Open Channel Flow

Subtopic: Open Channel Flow

Question Statement:

In a horizontal rectangular channel, an upstream supercritical flow of depth $y_1 = 0.4\text{ m}$ has Froude number $Fr_1 = 3.0$. the sequent subcritical depth $y_2$ in meters is (rounded off to two decimal places):

Answer Key:

1.51

Step-by-Step Solution & Explanation

$\frac{y_2}{y_1} = 0.5 (\sqrt{1 + 8(9)} - 1) = 0.5 (\sqrt{73} - 1) = 0.5 (8.544 - 1) = 3.772$. $y_2 = 0.4 \times 3.772 = 1.5088\text{ m} \approx 1.51\text{ m}$.
← Previous (ALLIED_0383) Next (ALLIED_0385) →

Practice In Authentic CBT Exam Interface

Test your skills under authentic timed conditions with live scoring and AIR percentile ranking.

Launch CBT Mock Test