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Power Systems

Power Systems
Buchholz relay is used for protection of

  bus bar.
  alternator.
  transformer.
  none of these.

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Power Systems
Lightning arresters are made up of which material?

 silicon oxide
 silver
 copper
 any of the above

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Power Systems
Steady state stability of a power system is improved by

All of these
 single pole switching
 using double circuit line instead of single circuit line
 decreasing generator inertia

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Power Systems
A transmission line has a surge impedance of 400 Ω for a length of the line of 200 km. If the length of line is increased to 400 km, then its surge impedance is

 200 Ω
 800 Ω
 0 Ω
 400 Ω

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Power Systems
The 1st nuclear plant in world was commissioned in

  U.S.A.
 U.K.
  UAE.
  U.S.S.R.

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Power Systems
The insulation of the modern EHV lines is designed based on

 corona.
 R × I.
 the lighting voltage.
  the switch voltage.

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