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Power Systems

Power Systems
In which of the following given faults, all the sequence currents are equal?

 LL
 LLG
 LLL
 LG

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Power Systems
Which of the following effects are associated with transmission line

All of these
 skin effect
 corona effect
 ferranti effect

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Power Systems
The positive sequence reactance will be equal to negative sequence if the equipment is

  transformer and transmission lines.
  none of these.
  generator.
  motor.

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Power Systems
A hydro electric generating station is supplied from a reservoir of capacity 5 × 10 − 6 cubic meters at a head of 200 meters. Find the total energy available in KWh if the overall efficiency is 75 %

 5 × 106 kWh.
 3 × 106 kWh.
  2.044 × 106 kWh.
 4.06 × 106 kWh.

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Power Systems
A 3 layer, total diameter of an ACSR conductor is 5 cm. Find the diameter of each strand?

 1 cm
 15 cm
 5 cm
 1.5 cm

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Power Systems
Which of the following represents the transmission line positive sequence reactance

 Xs +2 Xm
 2Xs + Xm
 Xm - Xs
 Xs - Xm

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