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Power Systems

Power Systems
For flat voltage profile system, voltage regulation is

 50%
 0%
 100%
 any of the above

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Power Systems
The per unit value of a 2 ohm resistor at 100 MVA and 10 kV base voltage is

 2 pu
 0.5 pu
 4 pu
 0.2 pu

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Power Systems
A network containing 50 buses in which 10 are the voltage control buses, 6 are the generator buses. Find the size of the Jacobian matrix?

 34*34
 84*84
 33*33
 83*83

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Power Systems
In a Gauss Seidel load flow method, the number of iterations may be reduced if the correction in voltage at each bus is multiplied by

 Lagrange multiplier
 Acceleration factor
 Blocking factor
 Gauss constant

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Power Systems
Operating cost of thermal power station is

  less than that of diesel power plant.
 is the same as that of nuclear power plant.
 less than that of hydroelectric power plant.
 less than that of nuclear power plant.

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Power Systems
An isolated synchronous generator with transient reactance equal to 0.1 pu on a 100 MVA base is connected to the high voltage bus through a step up transformer of reactance 0.1 pu on a 100 MVA base. The fault level at the bus is

 500 MVA
 100 MVA
 200 MVA
 400 MVA

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