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Power Systems

Power Systems
For n bus power system size of Y bus matrix is

 (n-2)×(n-2)
 (n-1)×(n-1)
 n×n
 (n-1)×(n-2)

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Power Systems
String chart is drawn between

 both 1 and 2
 nether 1 nor 2
 temperature (T) on X- axis, sag(S) and tension (T) on Y-axis
 T on Y-axis and S and T on on X-axis

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Power Systems
The angular moment of 10 MVA generator is 0.2. Find the new value of angular moment for 20 MVA base?

 0.25 pu
 0.4 pu
 0.2 pu
 0.1 pu

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Power Systems
The zero sequence current of a generator for line to ground fault is j3 pu. Then the current through the neutral during the fault is

 j6 pu
 j1 pu
 j9 pu
 j3 pu

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Power Systems
If the percentage reactance of an element is 20 % and the full load current is 50 Amp, the short circuit current will be

 300 Amp.
  250 Amp.
 350 Amp.
 200 Amp.

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Power Systems
Which of the following plants has the maximum eapital cost

 Steam plants.
 Diesel plants.
  Nuclear plants.
 Hydro-plants.

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