QUIZ 5 A hydroelectric power station has a dam catchment area of 2 square kilometers and a water capacity of 6 million cubic meter. The penstock, turbine and generator have 90%, 88% and 97% efficiencies respectively. If it is desired that this power station to have a capacity to generate a total electrical energy of 150,000 kWh. i. Calculate the required head (in meters) to generate the desired electrical energy. [3 marks] ii. Due to scarcity of water and low water levels, it is not desired that the power station's water reservoir levels go below 50 cm. If the power station is supplying electricity to a 7,000 kW load, for how many hours should the power station be run so that the water levels does not drop below 50 cm?