The theoretical value of coefficient of contraction of sharp edged orifice is:

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UKPSC JE Civil 8 May 2022 Official Paper-II
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  1. 0.611
  2. 0.85
  3. 0.98
  4. 1.00

Answer (Detailed Solution Below)

Option 1 : 0.611
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Concept:

Coefficient of contraction:

The ratio of the area of the jet at vena-contracta to the area of the orifice is known as the coefficient of contraction. It is denoted by Cc.

\(C_c={a_c\over a}\)

Where ac = area of jet at vena contracta, and a = area of orifice.

The theoretical value of the coefficient of the coefficient contraction (Cc) of a sharp-edged orifice is 0.611. Hence (1) is the correct answer.

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