Question

400 cumecs of water are being released from dam storage to meet the downstream demand through the turbines of the connected hydro plant. The effective head of water acting on the turbines is 50 m. The efficiency of the hydro plant is 0.8. The electrical power generated from this plant is __________________

(a) 1,56,800 MW

(b) 156.8 M kW

(c) 156.8 MW

(d) 156.8 kW

I got this question by my college director while I was bunking the class.

I want to ask this question from Hydropower in chapter Hydro Electric Power of Irrigation Engineering

Answer 1

The correct choice is (c) 156.8 MW

Easy explanation: Using 80% efficiency, Electrical energy = 7.84 QH where H is the design head in meters and Q is the design discharge in cumecs.

Electrical energy = 7.84 x 400 x 50 = 1, 56,800 kW = 156.80 MW.