Allied & ICAR Exam Bank • ALLIED_0382 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Open Channel Flow

Subtopic: Open Channel Flow

Question Statement:

In a rectangular channel of depth $y = 0.8\text{ m}$, flow velocity is $v = 4.0\text{ m/s}$. Taking $g = 9.81\text{ m/s}^2$, the Froude number $Fr$ is (rounded off to two decimal places):

Answer Key:

1.43

Step-by-Step Solution & Explanation

$Fr = \frac{4.0}{\sqrt{9.81 \times 0.8}} = \frac{4.0}{\sqrt{7.848}} = \frac{4.0}{2.8014} = 1.4278 \approx 1.43$.
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