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Power Systems

Power Systems
A CT is connected in ___________________ with the line.

  not connected.
  series.
  across.
  both A and B.

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Power Systems
Consider a long, two wire line composed of solid round conductors. The radius of both conductors is 0.25 cm and distance between their centers is 100 cm. If this distance is doubled, then the inductance per unit length.

 Decrease but does not halves.
 Halves.
  Increase but does not doubled.
 Doubled.

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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
 5
 0.22

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Power Systems
In a 3-phase transmission line, each phase is supported by 3 insulated discs, maximum voltage of each disc is 20 kV. Find the operating voltage of the transmission line per phase if efficiency of string is 80.6%.

 48.36 kV
 52.84 kV
 83.76 kV
 20 kV

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Power Systems
The most suitable circuit breaker for short line fault without switching resistor is

 none of these.
 air blast circuit breaker.
  SF6 breaker.
 oil circuit breaker.

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Power Systems
Find the number of strands of ACSR conductor for 3 layer transmission line?

 7
 1
 19
 29

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