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Power Systems

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

 power factor
 voltage
 current
 reactive power

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Power Systems
A buchholz relay is used for

 nether 1 nor 2
 protection of a transformer against all external faults
 both 1 and 2
 protection of a transformer against all internal faults

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Power Systems
Surge impedance loading of a line is increased by which of the following compensation methods?

 shunt reactor
 series capacitor
 shunt capacitor
 both 1 and 2

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Power Systems
Advantages of gauss siedel method is/are

 applicable for large power system network
 number of iterations are less
All of these
 calculation time for each iteration is less

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Power Systems
In a power system with negligible resistance, the fault current at a point is 8.00 pu. The series reactance is to be included at the fault point to limit the short circuit. current to 5.00 pu is

 0.125 pu.
  3.000 pu.
 0.200 pu.
 0.075 pu.

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Power Systems
A 3-phase transmission line has its conductors at the corners of an equilateral triangle with side 3m. The diameter of each conductor is 1.63 cm. The inductance of the line per phase per km is

 1.232 mH
 1.182 mH
 1.093 mH
 1.043 mH

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