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Power Systems

Power Systems
The insulator thickness on the conductor, in cables depends upon

 reactive power
 voltage
 current
 power factor

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Power Systems
A generator has reactances of sub transient (X")= 0.5 pu, transient (X') = 0.8 pu and synchronous reactance (X) = 5 pu. The voltages at these reactances are 1.2 V, 1.1 V and 1 V respectively. Find the corresponding sub transient fault current in pu?

 2.4 pu
 0.2 pu
 3.975 pu
 1.375 pu

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Power Systems
In a long transmission line, if we increase the length of the line, the parameters A and B respectively

 increases and increases
 decreases and increases
 increases and decreases
 decreases and decreases

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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

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

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Power Systems
The charging reactance of 50 km transmission line is 1500 Ω. What is the charging reactance for 100 km length of line?

 3000 Ω
 1500 Ω
 750 Ω
 1000 Ω

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Power Systems
Where do compounding done in thermal power plants

  Turbine.
  Coal handling plant.
  Ash handling plant.
  Generator.

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