Allied & ICAR Exam Bank • ALLIED_0366 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Fluid Mechanics in SWCE

Subtopic: Fluid Mechanics in SWCE

Question Statement:

A sharp-edged orifice of diameter $d = 50\text{ mm}$ operates under a constant head of $h = 4.0\text{ m}$. Coefficient of velocity $C_v = 0.98$. Taking $g = 9.81\text{ m/s}^2$, the actual jet velocity $v = C_v \sqrt{2gh}$ in m/s is (rounded off to two decimal places):

Answer Key:

8.68

Step-by-Step Solution & Explanation

$v = 0.98 \times \sqrt{2 \times 9.81 \times 4.0} = 0.98 \times \sqrt{78.48} = 0.98 \times 8.8589 = 8.6817\text{ m/s}$.
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