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Power Systems

Power Systems
A 20 MVA generator has inertia constant of 0.5 pu. Find new value for 50 MVA base?

 0.2 pu
 0.5 pu
 0.1 pu
 0.4 pu

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Power Systems
Graphite is use din nuclear plant as a / an

 electrode.
  moderator.
 coolant.
 fuel.

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Power Systems
Reflection coefficient of voltage is Rv

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

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Power Systems
The sequence components of the fault current are as follows : Ipositive = j1.5 pu, Inegative = − j0.5 pu, Izero = − j pu Which fault is this?

  LL.
  LLLG.
  LLG.
  LG.

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Power Systems
In an interconnected power system, the most suitable power plant to meet the peak load condition is

 nuclear plant
 pumped storage plant
 thermal plant
 hydro power plant

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Power Systems
On what factors does the selection of a water turbine depend

  All of above.
 Nature of load.
 Working head.
 Speed.

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