Home » MCQs » Fluid Mechanics MCQs » Notches and Weirs MCQs

The discharge over a rectangular weir is calculated using the formula

5. The discharge over a rectangular weir is calculated using the formula:

1. Q = kH^n
2. Q = Cd × A × √2g × H^3/2
3. Q = A × V
4. Q = Cd × A × H^2

Answer: B) Q = Cd × A × √2g × H^3/2

Explanation:

The discharge over a rectangular weir is calculated using the Francis formula, Q = Cd × A × √2g × H^3/2, where Cd is the coefficient of discharge, A is the cross-sectional area of flow, g is the acceleration due to gravity, and H is the head of water above the weir crest.