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Power Systems

Power Systems
The insulator thickness on the conductor, in cables depends upon

 current
 reactive power
 voltage
 power factor

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Power Systems
Surge impedance loading can be increased by

 increasing of inductance value
 both 1 and 2
 increasing of voltage level
 increasing of capacitance value

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Power Systems
Earthing switch is used for

All of these
 protection of equipment from ground faults
 measuring of safety voltage
 discharging residual energies

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Power Systems
In an interconnected power system, the most suitable power plant to meet the peak load condition is

 pumped storage plant
 hydro power plant
 thermal plant
 nuclear plant

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Power Systems
A 1- phase transmission line operating at 30 kV has radius of 1 cm and distance between conductors is 0.5 m. Assume m = δ =1, g = 21 kV/cm and frequency f = 50 Hz. Find the critical disruptive voltage?

 34.64 kV/phase
 17.32 kV/phase
 82.15 kV/phase
 41.075 kV/phase

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Power Systems
In a regenerative cycle, feed water is heated by

 all of above.
 exhaust gas.
  drained steam from turbine.
 heaters.

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