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Power Systems

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

 1 cm
 15 cm
 1.5 cm
 5 cm

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Power Systems
Apart from the skin effect the non uniformity of the current distribution is also caused by

All of these
 proximity effect
 bundled conductors
 ferranti effect

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Power Systems
An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z0 = j 0.15 pu, Z1 = Z2 = j 0.25 pu The neutral is grounded with a reactance of 0.05 pu. The fault current in pu for single line to ground fault is

 7.25 pu
 3.75 pu
 4.28 pu
 2.5 pu

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Power Systems
For variable heads of near about but less than 30 m, which type of turbines is used hydro power plant

 Francis.
 Pelton.
  Kaplan.
 None of above.

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Power Systems
Which of the following is used in thermal plants

 Otto cycle
All of these
 Joule cycle
 Rankine cycle

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Power Systems
Which of the following grounding is not practically preferred for protection of equipments?

 resistance grounding
All of these
 reactance grounding
 isolated grounding

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