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Electrical Cables

Electrical Cables
The minimum dielectric stress in a cable is at

Lead sheath
Bedding
Armour
Conductor surface

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Electrical Cables
The thickness of metallic shielding on cables is usually

40 to 60 mm
0.04 mm
3 to 5 mm
0.2 to 0.4 mm

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Electrical Cables
In case of three core flexible cable the color of the neutral is

Black
Blue
Brown
Red

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Electrical Cables
The breakdown of insulation of the cable can be avoided economically by the use of

None of the listed here
Insulating materials with different dielectric constants
Inter-sheaths
Both Inter-sheaths and Insulating materials with different dielectric constants

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Electrical Cables
_________ cables are used for 132 kV lines.

Extra super voltage
Extra high tension
Super tension
High tension

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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
Absence of harmonics
None of the listed here
Nonexistence of any stability limit

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