6216. What is the value of co-efficient of discharge for square edged circular orifice (for β = 0.3 to 0.5)? September 7, 2025 by Admin 0.61 – 0.63 0.5 – 0.75 0.75 – 0.90 0.35 – 0.55 ✅ The correct answer is option A.