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Power Systems

Power Systems
Most commonly used material for insulator is

All of these
 mica
 glass
 porcelain

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Power Systems
Find the number of strands of ACSR conductor for 3 layer transmission line?

 1
 7
 19
 29

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Power Systems
For n bus power system size of Y bus matrix is

 n×n
 (n-1)×(n-2)
 (n-2)×(n-2)
 (n-1)×(n-1)

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Power Systems
Mho relay is used for protection of

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

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Power Systems
For which one of the following types of motors, is the equal area criterion for stability applicable?

 Three phase induction motor
 Three phase synchronous motor
 DC series motor
 DC shunt motor

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Power Systems
Which of the following produces the radio interference in communication lines?

 both 1 and 2
None of these
 electro magnetic induction
 electro static induction

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