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Transmission & Distribution

Transmission & Distribution
When a conductor carries more current on the surface as compared to core, it is due to

Skin effect
Unsymmetrical fault
Corona
Permeability variation

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Transmission & Distribution
Overhead system can be designed for operation upto

11 kV
33 kV
66 kV
400 kV

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Transmission & Distribution
The domestic load that has unity power factor is

Filament lamp
Fan
Mixer
Tube

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Transmission & Distribution
If variable part of annual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as

Faraday's law
Kelvin's law
Ohm's law
Kirchhoff's law

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Transmission & Distribution
Which of the following faults is most likely to occur in cables?

All of these
Breakdown of cable insulation
Open circuit fault
Cross or short-circuit fault

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Transmission & Distribution
By using bundle conductors, the critical voltage for the formation of corona will

Remains same
Decrease
Increase
Not occur

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