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Power Systems

Power Systems
The rating of CB is in terms of

  voltage.
  current.
  volt - ampere.
  VAR.

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Power Systems
Length of the cable is doubled, its capacitance C will be

 one-half.
 doubled.
 unchanged.
 one-fourth.

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Power Systems
A 1-phase transmission line has an impedance (3+4j) Ω . Find the power factor of the load for achieving maximum and zero voltage regulation?

 0.8 lag and 0.6 lead
 0.6 lag and 0.6 lead
 0.6 lag and 0.8 lead
 0.8 lag and 0.8 lead

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Power Systems
The specific speed of water turbine is the speed at which the turbine develops

 a minimum horse power.
 maximum horse power.
 unit horse power at all heads.
  unit horse power at unit head.

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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
Plant capacity factor value is

 1
 less than 1
 0
 greater than 1

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