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Electrical Cables

Electrical Cables
Copper as conductor for cables is used as

Annealed
Hard drawn
Hardened and tempered
Alloy with chromium

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Electrical Cables
If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then the dielectric strength of insulation should be

10 kV/mm
5 kV/mm
15 kV/mm
30 kV/mm

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Electrical Cables
High tension cables are generally used up to

33 kV
11 kV
132 kV
66 kV

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Electrical Cables
In a cable the voltage stress is maximum at

Surface of the conductor
Sheath
Core of the conductor
Insulator

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Electrical Cables
The insulating material for cables should

Be acid proof
Be non-hygroscopic
All of the listed here
Be non-inflammable

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Electrical Cables
If a power cable and a communication cable are to run parallel the minimum distance between the two, to avoid interference, should be

30 cm
50 cm
100 cm
20 cm

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