The irreversible losses in the penstock and its inlet and those after the exit of the draft tube are estimated to be 7 m. The elevation difference between the reservoir surface upstream of the dam and the surface of the water exiting the dam is 140 m. If the flow rate through the turbine is 4000 L/min, determine
(a) The power loss due to irreversible head loss
(b) The efficiency of the piping
(c) The electric power output if the turbine-generator efficiency is 84 percent.