Solve this multiple-choice question and choose the correct option.

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Coefficient of contraction for an orifice Define the coefficient of contraction C<sub>c</sub> for a sharp-edged orifice in terms of areas. Choose the correct ratio.

Difficulty: Easy

actual velocity of jet at vena contracta to the theoretical velocity
loss of head in the orifice to the available head
actual discharge through an orifice to the theoretical discharge
area of jet at vena contracta to the area of orifice

Correct Answer: area of jet at vena contracta to the area of orifice

Explanation:

DefinitionsC_c = A_vc / A_o (contraction)C_v = V_actual / V_theoretical (velocity)C_d = Q_actual / Q_theoretical = C_c C_v (discharge)

Final Answerarea of jet at vena contracta to the area of orifice

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