Allied & ICAR Exam Bank • ALLIED_0365 MCQ • 1 Mark

Section 4: Soil and Water Conservation Engineering

Fluid Mechanics in SWCE

Subtopic: Fluid Mechanics in SWCE

Question Statement:

The vena contracta of a sharp-edged circular orifice discharging water from a tank is the section where:

Options:

  • (A) The jet area is minimum, streamlines are parallel, and pressure is atmospheric
  • (B) Discharge is minimum
  • (C) Velocity is zero
  • (D) Pressure head is maximum

Answer Key:

A

Step-by-Step Solution & Explanation

At vena contracta, convergence ceases, jet cross-section reaches its minimum ($C_c \approx 0.62-0.64$), and streamlines become parallel.
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