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Fluid Mechanics

Q1: The discharge through a V-notch weir varies as

A H3/2

B H1/2

C H5/2

D H2/3

ANS:C - H5/2

The discharge QQQ through a V-notch weir varies with the head HHH above the notch according to the following relationship: Q∝H5/2Q \propto H^{5/2}Q∝H5/2 This means that the discharge QQQ is proportional to H5/2H^{5/2}H5/2. Therefore, as the head HHH increases, the discharge through the V-notch weir increases as H5/2H^{5/2}H5/2. So, the correct answer is: H5/2H^{5/2}H5/2



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