Power Systems
The steam power plant efficiency can be improved by

 using large quantity of water.
 decreasing the load on the plant.
 burning large amount of coal.
  using high temperature and high pressure steam.

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Power Systems
In hydroelectric power plants

 both operating and initial cost are high.
 operating cost is high and initial cost is low.
 both operating and initial cost are low.
  operating cost is low and initial cost is high.

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