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Transmission & Distribution

Transmission & Distribution
In a distribution system major cost is that of

Meters
Conductors
Earthing system
Distribution transformer

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Transmission & Distribution
Which of the following characteristics should the line supports for transmission lines possess?

High mechanical strength
Low cost
Longer life
All of these

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Transmission & Distribution
The skin effect of a conductor will reduce as the

Permeability of conductor material increases
Diameter increases
Resistivity of conductor material increases
Frequency increases

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Transmission & Distribution
Skin effect only exist in

Low voltage dc overhead transmission
Cables carrying dc current
Ac transmission
High voltage dc overhead transmission

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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
Cross or short-circuit fault
Open circuit fault

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Transmission & Distribution
Which of the following is the source of heat generation in the cables?

All of these
Dielectric losses in cable insulation
Losses in the metallic sheathings and armourings
losses in the conductor

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