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Power Systems

Power Systems
The sequence components of the fault current are as follows: IR1 = j1.5 pu, IR2 = -j0.5 pu, IR0 = -j1. The type of fault is

 LLG
 LLL
 LG
 LL

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Power Systems
The economics of power plant is greatly influenced by

 nether 1 nor 2
 load factor
 diversity factor
 both 1 and 2

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Power Systems
The flow duration curve at a given head of a hydroelectric plant is used to determine

 diversity factor for the plant.
  total power available at the site.
 load factory at the plant.
 total units of energy available.

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Power Systems
Where the voltage is high and current to be interrupted is low, Which of following the breaker is preferable?

  Vacuum CB.
 Oil CB.
 Any of these.
 Air blast CB.

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Power Systems
Condition for maximum voltage regulation

 tanφ = R/X
 tanφ = X/R
 cosφ = R/X
 cosφ = X/R

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Power Systems
Which of the following faults is/are treated as external faults?

 Failure of excitation
 Over voltage
 Failure of prime mover of the generator
All of these

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