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Power Systems

Power Systems
For large plants of capacity for more than 15 MW, what type of cooling is used

  Air.
  Hydrogen.
  Liquid.
  Water.

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Power Systems
Which of the following power plants needs highly skilled/qualified engineers for its operation

 Hydro Power Plant
 Thermal.
 Nuclear.
 Gas-turbine.

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Power Systems
In thermal power stations, economiser will

 reduce the thermal efficiency
 reduce the heat
 increase the thermal efficiency
 both 2 and 3

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Power Systems
Which of the following power stations is mainly used to cover peak load on the system?

 coal based thermal power plant
 gas based thermal power plant
 nuclear plant
 pumped storage hydro power plant

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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
Mechanical energy is supplied to a DC generator at the rate of 4200 J / S. The generator delivers 32.2 Amp at 120 V. How much energy is cost per minute of operation

 25060 J.
  20160 J.
 23060 J.
  20060 J.

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