A centrifugal pump runs at 1500 rpm and delivers 1500 m3/hr of water againt a head of 70m when absorbing 350 kW. The impeller os 0.5 m in dia. And has vames set at outlet at 30 degree to the reverse tangential direction. These are 30mm wide and reduce the nominal flow area by 10%. There is no inlet whirl and the loss due to slip is 5%. In an emergency situation the machine is run as a turbine when the hydraulic efficiency fall by 12 percentage points and the leakage loss is doubled compared with its operation as a pimp. If the head, flow rate and speed remain unchanged determining the power output. Density of water = 1000 kg/m3.