ELECTRICAL CABLES QUIZ

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

Inter-sheaths

None of the listed here

Both Inter-sheaths and Insulating materials with different dielectric constants

Insulating materials with different dielectric constants

TRUE ANSWER : ?
YOUR ANSWER : ?

The relative permittivity of rubber is

Between 2 and 3

None of the listed here

Between 8 and 9

Between 5 and 7

TRUE ANSWER : ?
YOUR ANSWER : ?

The inter sheaths in the cables are used to

None of the listed here

Avoid the requirement of good insulation

Minimize the stress

Provide proper stress distribution

TRUE ANSWER : ?
YOUR ANSWER : ?

The advantage of cables over overhead transmission lines is

Easy maintenance

Low cost

Can be used in high voltage circuits

Can be used in congested areas

TRUE ANSWER : ?
YOUR ANSWER : ?

In single core cables armouring is not done to

None of the listed here

Either of the listed here

Avoid excessive sheath losses

Make it flexible

TRUE ANSWER : ?
YOUR ANSWER : ?

The thickness of metallic shielding on cables is usually

0.04 mm

40 to 60 mm

0.2 to 0.4 mm

3 to 5 mm

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following insulation is used in cables?

Paper

Rubber

All of the listed here

Varnished cambric

TRUE ANSWER : ?
YOUR ANSWER : ?

The material for armouring on cable is usually

Galvanized steel wire

Steel tape

Both Steel tape and Galvanized steel wire

None of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

High tension cables are generally used up to

66 kV

11 kV

33 kV

132 kV

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

Double

Four times

One half

None of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

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