ELECTRICAL CABLES QUIZ

In a cable immediately above metallic sheath ________ is provided.

Armouring

Earthing connection

Bedding

None of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

Empire tape is

Vulcanized rubber

Varnished cambric

None of the listed here

Impregnated paper

TRUE ANSWER : ?
YOUR ANSWER : ?

The inter sheaths in the cables are used to

None of the listed here

Provide proper stress distribution

Avoid the requirement of good insulation

Minimize the stress

TRUE ANSWER : ?
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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 : ?
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_________ cables are used for 132 kV lines.

Extra high tension

Extra super voltage

High tension

Super tension

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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

TRUE ANSWER : ?
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If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then the dielectric strength of insulation should be

5 kV/mm

15 kV/mm

10 kV/mm

30 kV/mm

TRUE ANSWER : ?
YOUR ANSWER : ?

The advantage of cables over overhead transmission lines is

Can be used in high voltage circuits

Low cost

Easy maintenance

Can be used in congested areas

TRUE ANSWER : ?
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A certain cable has an insulation of relative permittivity 4. If the insulation is replaced by one of relative permittivity 2, the capacitance of the cable will become

Four times

None of the listed here

One half

Double

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Underground cables are laid at sufficient depth

To minimize temperature stresses

To avoid being unearthed easily due to removal of soil

All of the listed here

To minimize the effect of shocks and vibrations due to gassing vehicles, etc.

TRUE ANSWER : ?
YOUR ANSWER : ?

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