Water flows from the bottom of a large tank where the pressure is 90 psia to a turbine which produces 30 hp. The turbine is located 90 ft below the bottom of the tank. The pressure at the turbine exit...

Water flows from the bottom of a large tank where the pressure is 90 psia to a turbine which produces 30 hp. The turbine is located 90 ft below the bottom of the tank. The pressure at the turbine exit is 30 psia and the water velocity is 30 ft/s. The flow rate in the system is 120 lbm/s. If the frictional loss in the system, not including the turbine, is 32 ft lbf/lbm

a. Draw a flow system showing the control volume and control surfaces with reference to a zero energy plane.

b. Find the efficiency of the turbine.