What is the value of co-efficient of discharge for square edged circular orifice

Question

What is the value of co-efficient of discharge for square edged circular orifice (for β = 0.3 to 0.5)?

Options:

A . 0.61 - 0.63

B . 0.5 - 0.75

C . 0.75 - 0.90

D . 0.35 - 0.55

Answer: Option A

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