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Power Systems

Power Systems
Condition for maximum voltage regulation

 cosφ = R/X
 tanφ = R/X
 cosφ = X/R
 tanφ = X/R

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Power Systems
Pump storage schemes are used to improve

 the diversity factor.
 the load factor.
 the power factor.
  the plant capacity factor as well as the load factor of the power system.

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Power Systems
Calorific value of solid fuel is expressed as

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

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Power Systems
In a 3-phase transmission line, each phase is supported by 3 insulated discs, maximum voltage of each disc is 20 kV. Find the operating voltage of the transmission line per phase if efficiency of string is 80.6%.

 48.36 kV
 83.76 kV
 20 kV
 52.84 kV

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Power Systems
A 200 MW capacity generator has a speed regulation of 4% for a frequency drop of 0.05 Hz. Find the power input supplied by the turbine for maintaining constant frequency?

 5 MW
 10 MW
 15 MW
 20 MW

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Power Systems
The power output from an hydroelectric plants depend on

 type of turbine, type of dam and type of catchment area.
  discharge, system efficiency.
 type of dam, head, system efficiency.
 type of dam, type of catchment area and discharge.

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