If the coefficient of contraction (Cc) for a sharp-edged orifice is 0.65 and the coefficient of velocity (Cv) of flow is 0.92, then the coefficient of discharge (Cd) will be:

Two reservoirs at different levels are connected by two parallel pipes of lengths L and diameters 2d and d respectively. Assuming the friction factor is the same for both pipes, the ratio of the discharge in the two pipes (larger : smaller) is:

For a two-dimensional flow, the stream function is given by ψ = 3x2 - y3. The magnitude of velocity at the point (2, 1) is: