Power Generation MCQ Part#11

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Multiple choice questions on Power Generation.

Part 11 MCQ#1

Statement: A hydroelectric power plant is supplied from a reservoir having a capacity of 7*106 cubic meters and a head of 220 meters. What is the total available energy if the overall efficiency of the plant is 82%

  1. 1.65 * 106 kWh
  2. 3.44 * 106 kWh
  3. 4.92 * 106 kWh
  4. 7.54 * 106 kWh

Cottrect answer: 2. 3.44 * 106 kWh

Solution:

Weight of water available = W = 7*106 * 1000 * 9.81 = 6.867*1010
Electrical Energy available = W * H * Overall Efficiency
= 6.867*1010 * 220 * 0.82
= 1.238*1013 watt-sec
= 1.238*1013/(3600*1000) kWh
= 3.44*106 kWh

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