Allied & ICAR Exam Bank • ALLIED_0362 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Fluid Mechanics in SWCE

Subtopic: Fluid Mechanics in SWCE

Question Statement:

According to Francis formula for a sharp-crested rectangular weir with $n = 2$ end contractions, the effective crest length is $L' = L - 0.1 n H$. If physical length $L = 2.0\text{ m}$ and head $H = 0.3\text{ m}$, the effective length $L'$ in meters is:

Answer Key:

1.94

Step-by-Step Solution & Explanation

$L' = 2.0 - 0.1(2)(0.3) = 2.0 - 0.06 = 1.94\text{ m}$.
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