A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm

Question

A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is

Options:

A . 0.46

B . 0.64

C . 0.78

D . 0.87

Answer: Option B

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