ELECTRICAL CABLES QUIZ

The minimum dielectric stress in a cable is at

Armour

Conductor surface

Lead sheath

Bedding

TRUE ANSWER : ?
YOUR ANSWER : ?

The insulation of the cable decreases with

The decrease in the length of the insulation

None of the listed here

Both of the listed here

The increase in length of the insulation

TRUE ANSWER : ?
YOUR ANSWER : ?

Empire tape is

Varnished cambric

None of the listed here

Impregnated paper

Vulcanized rubber

TRUE ANSWER : ?
YOUR ANSWER : ?

The breakdown voltage of a cable depends on

Time of application of the voltage

Presence of moisture

Working temperature

All of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

In single core cables armouring is not done to

None of the listed here

Avoid excessive sheath losses

Either of the listed here

Make it flexible

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

One half

None of the listed here

Four times

TRUE ANSWER : ?
YOUR ANSWER : ?

Dielectric strength of rubber is around

15 kV/mm

25 kV/mm

30 kV/mm

5 kV/mm

TRUE ANSWER : ?
YOUR ANSWER : ?

The disadvantage with paper as insulating material is

It is an organic material

It has high capacitance

None of the listed here

It is hygroscopic

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Sheath

Armour

Conductor surface

Insulation layer

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Inter-sheaths

Insulating materials with different dielectric constants

Both Inter-sheaths and Insulating materials with different dielectric constants

None of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

↑