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Power Systems

Power Systems
Find the number of strands of ACSR conductor for 3 layer transmission line?

 1
 29
 7
 19

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Power Systems
A transmission line is operating under no load has ABCD parameters B = 100∠90° has a phase shift of 0.2 rad, how much shunt reactor is required for compensation of ferranti effect?

 15.9 H
 2 mH
 2 H
 15.9 mH

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Power Systems
A guard ring is used in string type insulator having 3 units to improve string efficiency. Find the capacitance of metal link 2 if pin to earth capacitance of each unit is 1 F?

 2 F
 0.5 F
 1 F
 4 F

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Power Systems
The function of moderator in a nuclear reactor is

All of these
 to increase the energy of the neutrons.
  to slow down the neutrons.
 to absorb the excess.

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Power Systems
The corona loss on a particular system at 60 Hz is 1 kW/km per phase. What is the corona loss at 50 Hz in kW/km per phase?

 0.93
 1
 1.13
 0.882

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Power Systems
Which one of the following relays has the capability of anticipating the possible major fault in a transformer?

 Differential relay
 Over fluxing relay
 Buchholz relay
 Over current relay

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