ELECTRICAL CABLES QUIZ

The thickness of the layer of insulation on the conductor, in cables, depends upon

Current carrying capacity

Reactive power

Voltage

Power factor

TRUE ANSWER : ?
YOUR ANSWER : ?

The insulating material for a cable should have

low cost

High dielectric strength

All of the listed here

High mechanical strength

TRUE ANSWER : ?
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If the length of a cable is doubled, its capacitance

Becomes one-half

Becomes one-fourth

None of the listed here

Becomes double

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

20 cm

50 cm

30 cm

100 cm

TRUE ANSWER : ?
YOUR ANSWER : ?

Low tension cables are generally used up to

200 V

400 V

600 V

1000 V

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YOUR ANSWER : ?

The advantage of cables over overhead transmission lines is

Low cost

Can be used in congested areas

Easy maintenance

Can be used in high voltage circuits

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Copper as conductor for cables is used as

Annealed

Alloy with chromium

Hardened and tempered

Hard drawn

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Conduit pipes are normally used to protect ________ cables.

Armoured

All of the listed here

PVC sheathed cables

Unsheathed cables

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Solid type cables are considered unreliable beyond 66 kV because

There is a danger of breakdown of insulation due to the presence of voids

Skin effect dominates on the conductor

Insulation may melt due to higher temperature

Of corona loss between conductor and sheath material

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In a cable immediately above metallic sheath ________ is provided.

Armouring

None of the listed here

Bedding

Earthing connection

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YOUR ANSWER : ?

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