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Power Systems

Power Systems
The most commonly used material for insulators of overhead lines is

 mica
 porcelain
 glass
 PVC

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Power Systems
Frequencies must be same in which of the following line to exchange the power from one place to other place ?

 Synchronous line
 Asynchronous line
 both 1 and 2
 No need of same frequency for exchange of power

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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?

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

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Power Systems
One atomic mass unit is equivalent to

 120.4 MeV.
  931.4 MeV.
 180.5 MeV.
 251.2 MeV.

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Power Systems
Asynchronous tie line is a

 either 1 or 2
 DC transmission line
 AC transmission line
None of these

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Power Systems
A power station plant load factor is defined as the ratio of

 minimum load to peak load
 average load to the peak load
 the energy generated to that of maximum energy that could have been generated
 minimum load to average load

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