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Power Systems

Power Systems
The Y bus matrix of 100 bus interconnected system is 90% sparse. Hence the number of transmission lines in the system must be

 250
 450
 900
 500

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Power Systems
If transmission line parameters A and B are 0.9∠0° and 200∠90° respectively. Find the shunt reactor required to compensate the ferranti effect?

 2000 Ω
 3000 Ω
 1500 Ω
 750 Ω

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Power Systems
Which type of connection is employed for current transformers for the protection of star- delta connected 3-phase transformer?

 delta-delta
 star-delta
 delta-star
 star-star

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Power Systems
A synchronous generator is of 100 MVA have inertia constant of 20 MJ/MVA. Find the angular momentum in MJsec/electrical degrees

 0.4
 2000
 0.22
 5

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Power Systems
The insulation of modern EHV is designed based on

  switching voltage.
 corona.
 lightning voltage.
 RI.

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Power Systems
On a power system network the load is increasing represents the value of impedance

  decrease.
  none of above.
  remains constant.
  increase.

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