ELECTRICAL CABLES QUIZ

The relative permittivity of rubber is

None of the listed here

Between 2 and 3

Between 8 and 9

Between 5 and 7

TRUE ANSWER : ?
YOUR ANSWER : ?

The minimum dielectric stress in a cable is at

Conductor surface

Bedding

Lead sheath

Armour

TRUE ANSWER : ?
YOUR ANSWER : ?

Empire tape is

None of the listed here

Impregnated paper

Varnished cambric

Vulcanized rubber

TRUE ANSWER : ?
YOUR ANSWER : ?

The material for armouring on cable is usually

Galvanized steel wire

None of the listed here

Both Steel tape and Galvanized steel wire

Steel tape

TRUE ANSWER : ?
YOUR ANSWER : ?

In case of three core flexible cable the color of the neutral is

Blue

Brown

Red

Black

TRUE ANSWER : ?
YOUR ANSWER : ?

Solid type cables are considered unreliable beyond 66 kV because

Of corona loss between conductor and sheath material

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

Skin effect dominates on the conductor

Insulation may melt due to higher temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

In the cables, sheaths are used to

Provide enough strength

Prevent the moisture from entering the cable

None of the listed here

Provide proper insulation

TRUE ANSWER : ?
YOUR ANSWER : ?

The disadvantage with paper as insulating material is

It has high capacitance

It is an organic material

None of the listed here

It is hygroscopic

TRUE ANSWER : ?
YOUR ANSWER : ?

The thickness of metallic shielding on cables is usually

3 to 5 mm

40 to 60 mm

0.2 to 0.4 mm

0.04 mm

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following protects a cable against mechanical injury?

Bedding

Sheath

Armouring

None of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

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