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

Concept/Approach Coefficient of resistance (head-loss coefficient) Cr quantifies energy loss: Cr = hloss / h. Other coefficients: Cv = va/vth, Cc = ajet/aorifice, Cd = Qa/Qth. Final AnswerLoss of head in the orifice divided by the available head.

Curioustab

Orifices: coefficient of resistance (head-loss coefficient) — select the correct definition Choose the ratio that defines the coefficient of resistance for an orifice.

Mechanical Engineering Hydraulics and Fluid Mechanics Difficulty: Easy

Choose an option

A

Actual velocity at vena contracta / Theoretical velocity
B

Area of jet at vena contracta / Area of orifice
C

Loss of head in the orifice / Available head at the orifice exit
D

Actual discharge / Theoretical discharge

Answer

Correct Answer: Loss of head in the orifice / Available head at the orifice exit

Explanation

Concept/Approach

Coefficient of resistance (head-loss coefficient) C_r quantifies energy loss: C_r = h_loss / h.
Other coefficients: C_v = v_a/v_th, C_c = a_jet/a_orifice, C_d = Q_a/Q_th.

Final AnswerLoss of head in the orifice divided by the available head.

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