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Power Systems

Power Systems
India’s largest thermal power station is located at

 Neyveli.
 Kota.
 Sarni.
 Chandrapur.

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Power Systems
A 10 MVA generator has reactance of 0.2 pu. Find the new reactance value for 50 MVA base?

 0.2 pu
 0.25 pu
 1 pu
 5 pu

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Power Systems
The SWR on a lossless transmission line of the characteristic impedance 100 ohm is 3. The line is the terminated by

 A resistance of j100/3 ohm.
 A resistance of 100/3 ohm.
 A resistance of j300 ohm.
 A resistance of 100 ohm.

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Power Systems
Lightning arresters are used to protect electrical equipment against

 over currents due to lightning stroke.
 direct strokes of lightning.
  over voltages due to indirect lightning stroke.
 power frequency of over voltages.

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Power Systems
How to find the total number of strands (N) when number of layers (x) are given

 Total number of strands N = 3x² - 3x + 1
 Total number of strands N = 3x² + 3x - 1
 Total number of strands N = 3x² - 3x - 1
 Total number of strands N = 3x² + 3x + 1

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Power Systems
A transmission line is compensated with shunt capacitance Csh. If the uncompensated transmission line surge impedance is Zs, then find the new surge impedance Zn after shunt compensation?

 Zs/√(1 + Kcsh)
All of these
 Zs*√(1 + Kcsh)
 √(1 + Kcsh)/Zs

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