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Electrical Cables

Electrical Cables
Which of the following insulation is used in cables?

Paper
All of the listed here
Rubber
Varnished cambric

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Electrical Cables
The current carrying capacity of cables in D.C. is more than that in A.C. mainly due to

Smaller dielectric loss
Nonexistence of any stability limit
None of the listed here
Absence of harmonics

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Electrical Cables
Empire tape is

Varnished cambric
Impregnated paper
None of the listed here
Vulcanized rubber

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Electrical Cables
High tension cables are generally used up to

66 kV
33 kV
11 kV
132 kV

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Electrical Cables
Pressure cables are generally not used beyond

132 kV
11 kV
33 kV
66 kV

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Electrical Cables
Dielectric strength of rubber is around

25 kV/mm
5 kV/mm
15 kV/mm
30 kV/mm

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