A) A large Francis turbine having the following specification: diameter of runner outside (1.5m) and runner width (0.135m). The turbine produce (16 MWatt) below the height of 260m at rotation speed (600 r.p.m). If the discharge is (7m'/s) and flow velocity at the end of draft tube is (16 m/s). Taking zero velocity of whirl at outside and blade thickness approach to zero. Find the overall and hydraulic efficiency, although find the angles between velocity of runner, relative velocity and velocity of flow.

A rection turbine has guide vane angle 30° the runner blades make an angle of 80° relative to the tanget at inlet .the blades width at inlet is 1/4 of the outer diameter .the water does not have any tanget velocity at outlet.the head is 25 m and the rotational speed of the runner is 16.67 rotation per second (rps) the turbine efficiency is 88% determine the runner diameter at the inlet and the power developed by this turbine