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Power Systems

Power Systems
Fault calculations using computer are usually done by

 Y bus method
None of these
 Z bus method
 either 1 or 2

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Power Systems
A transmission line has a surge impedance of 400 Ω is connected with the cable having surge impedance of 40 Ω, a surge magnitude of 100 kV is travelling from the transmission line towards the cable. Find the incident current?

 200 A
 100 A
 2500 A
 250 A

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Power Systems
The radiation shield for a nuclear power reactor for biological safety is provided by having the reactor

 encased thick metal wall.
 isolated from outside word with strong magnetic field.
  encased by thick concrete wall.
 immersed in water pool.

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Power Systems
Skin effective is more in case of

None of these
 same in both cases
 communication lines
 power lines

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Power Systems
Surge impedance loading of a transmission line can be increased by

 increasing its voltage level
 addition of lumped inductance in parallel
 both 1 and 3
 addition of lumped capacitance in series

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Power Systems
In a 400 KV network, 360 KV is recorded at a 400 KV bus. The reactive power absorbed by shunt rated for 50 MVAr, 400 KV connected at the bus is

  40.5 MVAr.
 61.73 MVAr.
 55.56 MVAr.
 45 MVAr.

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