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Power Systems

Power Systems
Mho relay is used for protection of

  none of these.
  short lines.
  long lines.
  medium lines.

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Power Systems
The economics of power plant is greatly influenced by

 diversity factor
 both 1 and 2
 load factor
 nether 1 nor 2

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Power Systems
Oxide film arrestor has which of the following properties?

 Installed at points of transmission line where daily visit is difficult.
 Both A and B.
 It is expensive.
 Does not require daily charging.

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Power Systems
To improve the efficiency of thermal power plant ________________ is placed between boiler and turbine.

  ash handling point.
  air preheater.
  economizer.
  superheater.

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Power Systems
A hydraulic turbine having rated speed of 250 rpm is connected to a synchronous generator. In order to produce power at 50 Hz, the numbers of pole are required in the generator

 12.
 6.
  24.
 16.

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Power Systems
A thermal power plant is being supplied with coal having much more ash content than that for which it was designed. Which of its following units needs major modifications

 Ash handling unit.
 Condenser.
 Cooling tower.
 Pulversing unit.

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