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Electrical Cables

Electrical Cables
Copper as conductor for cables is used as

Hardened and tempered
Annealed
Hard drawn
Alloy with chromium

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Electrical Cables
The surge resistance of cable is

50 ohms
100 ohms
5 ohms
500 ohms

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Electrical Cables
A cable carrying alternating current has

Hysteresis, leakage and copper losses only
Hysteresis losses only
Hysteresis, leakage, copper and friction losses
Hysteresis and leakage losses only

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Electrical Cables
In a cable, the maximum stress under operating conditions is at

Armour
Insulation layer
Sheath
Conductor surface

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Electrical Cables
In the cables, sheaths are used to

None of the listed here
Prevent the moisture from entering the cable
Provide enough strength
Provide proper insulation

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Electrical Cables
Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ?

Compressed SF6 gas
Vulcanised rubber
Polyvinyle chloride
Impregnated paper

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