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Power Systems

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

 mica
 glass
 PVC
 porcelain

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Power Systems
Bundled conductors in EHV transmission lines

 increase inductance
 decrease capacitance
 increase capacitance
 decrease inducatance

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Power Systems
If all the sequence voltages at the fault point in a power system are equal, then the fault point is a

 LL
 LG
 LLL
 LLG

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Power Systems
In a 4*4 Y bus matrix the number of non zero elements are 12. Find the sparsity of the system?

 1
 0.5
 0.75
 0.25

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Power Systems
If the fault is very nearer to the generator, the fault current is

 any of the above
 zero
 less
 larger

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Power Systems
The insulation of the modern EHV lines is designed based on

 the lighting voltage.
 corona.
  the switch voltage.
 R × I.

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