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Power Systems

Power Systems
For large plants of capacity for more than 15 MW, what type of cooling is used

  Hydrogen.
  Liquid.
  Water.
  Air.

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Power Systems
Which of the following represents the transmission or reflection coefficient of voltage Tv? (Zl = Surge impedance of load, Zs = Surge impedance of line)

 2Zs/(Zs + Zl)
 (Zl - Zs)/(Zs + Zl)
 2Zl/(Zs + Zl)
 (Zs - Zl)/(Zs + Zl)

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Power Systems
Taking the density of water to be 1000 kg/m³, how much power would be developed by a hydro electric generator unit, assume 100% efficiency, with 1 m head and 1 m³/s discharge?

 19.60 kW
 2.90 kW
 4.45 kW
 9.81 kW

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Power Systems
Which of the following power planets is the least reliable

 Geothermal.
  Wind.
 Tidal.
 Solar.

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Power Systems
The amount of ash content in Indian coal

  60 %.
  45 %.
 20 %.
 35 %.

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Power Systems
Transmission line has a length of 300 km, operating at sending end voltage Vs = 1 pu, find the receiving end voltage(Vr) at no load?

 1.098 pu
 0.098 pu
 0.98 pu
 1 pu

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