A fluid jet is discharging from a 100 mm nozzle and the vena-contracta formed has a diameter of 90 mm. If the coefficient of velocity is 0.95, then the coefficient of discharge for the nozzle is
- A. 0.7695
- B. 0.81
- C. 0.9025
- D. 0.855
Answer: A. 0.7695
Explanation: $C_c = (d_c/d)^2 = (90/100)^2 = 0.81$. $C_d = C_c \times C_v = 0.81 \times 0.95 = 0.7695$.