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Power Systems

Power Systems
Galvanised steel is generally used as

All of these
 earth wire.
 stray wire.
 structural components.

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Power Systems
Reheat cycle in thermal power plant is used to

  increase thermal efficiency.
 reduce loss of heat.
 improve condenser performance.
 utilize heat of flue gases.

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Power Systems
The use of high speed circuit breakers

 reduces the short circuit current.
 increased the short circuit current.
 decrease system stability.
  improves system stability.

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Power Systems
String efficiency depends upon

 no. of SCR in the string.
 voltage rating of whole string.
 voltage rating of one SCR.
  all of these.

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Power Systems
Zero sequence currents can flow from a line into a transformer bank if the windings are in

 delta / delta.
 star / grounded star.
 delta / star.
  ground star / delta.

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

  Liquid.
  Hydrogen.
  Air.
  Water.

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