ELECTRICAL CABLES QUIZ

Impregnated paper

Vulcanised rubber

Polyvinyle chloride

Compressed SF6 gas

Inter-sheaths

Both Inter-sheaths and Insulating materials with different dielectric constants

Insulating materials with different dielectric constants

None of the listed here

High mechanical strength

low cost

All of the listed here

High dielectric strength

Can be used in congested areas

Can be used in high voltage circuits

Low cost

Easy maintenance

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

Insulation may melt due to higher temperature

Skin effect dominates on the conductor

Of corona loss between conductor and sheath material

All of the listed here

High resistivity

Low permittivity

High dielectric strength

None of the listed here

Make it flexible

Avoid excessive sheath losses

Either of the listed here

Grading according to capacitance of cables per km length

Use of dielectrics of different permeabilities

Cables using single dielectric in different concentrations

Capacitance required to be introduced at different lengths to counter the effect of inductance

Conductor surface

Armour

Bedding

Lead sheath

Positive voltage conductor

Post varnish conductor

Polyvinyl chloride

Pressed and varnished cloth