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Power Systems

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

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

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Power Systems
The annual depreciation of hydro power plant is about

 10 - 15 %.
 20 - 25 %.
 15 - 20 %.
  0.5 - 1.5 %.

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Power Systems
A 200 MW capacity generator has a speed regulation of 4% for a frequency drop of 0.05 Hz. Find the power input supplied by the turbine for maintaining constant frequency?

 15 MW
 20 MW
 10 MW
 5 MW

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Power Systems
Advantages of gauss siedel method is/are

 calculation time for each iteration is less
 number of iterations are less
All of these
 applicable for large power system network

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Power Systems
A 3-phase transmission line operating at Vs = 400 kV and has ABCD parameters A= D = 0.8∠0°, B = 100∠°90 Ω, C = 0.5*10^-6∠90° â„§. Find Charging current under no load?

 0.144∠90° A/phase
 0.344∠90° A/phase
 1.144∠90° A/phase
 0.512∠90° A/phase

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Power Systems
In case of failure of prime mover of the generator, which type of relay is used?

 impedance relay
 offset mho relay
 reverse power relay
 distance relays

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