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Power Systems

Power Systems
Lightning arresters are made up of which material?

 silicon oxide
 any of the above
 copper
 silver

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Power Systems
Stock bridge dampers are used in case hill areas to over come the which problem?

 increase power factor
All of these
 unequal ice loading
 increase string efficiency

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Power Systems
What is the preferred type of circuit breaker(CB) to be installed in extra high voltage AC system?

 Air blast CB
 Vacuum CB
 Sulphur hexafluoride CB
 Bulk oil type CB

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Power Systems
Find the characteristic impedance of a transmission line, if impedance is 16 Ω and admittance is 0.1 mâ„§?

 400 Ω
 160 Ω
 320 Ω
 200 Ω

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Power Systems
Calorific value of solid fuel is expressed as

  KCal / lt.
  Cal / gm.
  Cal / lt.
  KCal / gm.

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Power Systems
For variable heads of near about but less than 30 meters, which type of turbine is used in hydro power station?

 Pelton
 Francis
None of these
 Kaplan

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