ELECTRICAL CABLES QUIZ

_________ cables are used for 132 kV lines.

Extra super voltage

Extra high tension

Super tension

High tension

TRUE ANSWER : ?
YOUR ANSWER : ?

The insulating material for a cable should have

All of the listed here

High dielectric strength

High mechanical strength

low cost

TRUE ANSWER : ?
YOUR ANSWER : ?

The disadvantage with paper as insulating material is

It is hygroscopic

None of the listed here

It is an organic material

It has high capacitance

TRUE ANSWER : ?
YOUR ANSWER : ?

If the length of a cable is doubled, its capacitance

Becomes one-half

None of the listed here

Becomes double

Becomes one-fourth

TRUE ANSWER : ?
YOUR ANSWER : ?

The material for armouring on cable is usually

Galvanized steel wire

None of the listed here

Steel tape

Both Steel tape and Galvanized steel wire

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Conductor surface

Armour

Sheath

Insulation layer

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Vulcanised rubber

Compressed SF6 gas

Impregnated paper

Polyvinyle chloride

TRUE ANSWER : ?
YOUR ANSWER : ?

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

None of the listed here

Four times

One half

Double

TRUE ANSWER : ?
YOUR ANSWER : ?

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

30 cm

50 cm

20 cm

100 cm

TRUE ANSWER : ?
YOUR ANSWER : ?

In a cable immediately above metallic sheath ________ is provided.

None of the listed here

Bedding

Armouring

Earthing connection

TRUE ANSWER : ?
YOUR ANSWER : ?

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