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Power Systems

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

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

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Power Systems
If a generator of 250 MVA rating has an inertia constant of 6 MJ/MVA, its inertia constant on 100 MVA base is

 6 MJ/MVA
 10.5 MJ/MVA
 15 MJ/MVA
 2.5 MJ/MVA

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Power Systems
A 3 core cable gives on test a capacitance of 3.7 µF between two cores. Find the line charging current of the cable when it is connected to 11 kV, 50 Hz system?

  14.76 A.
 14.7 mA.
 1 A.
 1.476 A.

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Power Systems
Which of the following statements are true?

 Bus admittance matrix is a sparse matrix
 Bus impedance matrix is a full matrix
 nether 1 nor 2
 both 1 and 2

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Power Systems
Surge impedance loading of a 3-phase, 400 kV transmission line is 400 Ω. The surge impedance loading is

 1600 MW
 800 MW
 200 MW
 400 MW

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Power Systems
Calorific value of solid fuel is expressed as

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

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