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Power Systems

Power Systems
Which of the following is/are base load plants?

 thermal plants
 nuclear plants
 hydro plants
All of these

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Power Systems
Fault calculations using computer are usually done by

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

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Power Systems
A hydroelectric power station is commonly found in

  hilly areas.
 desert areas.
 grasslands.
 swamps.

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Power Systems
A fault occurring at the terminals of an unloaded synchronous generator operating at its rated voltage has resulted in the following values of currents and voltages. IR0 = j 2.37 pu IR1 = -j 3.05 pu IR2 = j 0.68 pu VR0 = VR1 = VR2 = 0.237 pu. Which of the following faults has occurred?

 LL
 LLG
 LLL
 LG

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Power Systems
If the conductor diameter decreases, inductance of the line,

None of these
 decreases
 remains unaffected
 increases

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Power Systems
Reflection coefficient of voltage is Rv

 2Zl/(Zs + Zl)
 (Zl - Zs)/(Zs + Zl)
 2Zs/(Zs + Zl)
 (Zs - Zl)/(Zs + Zl)

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