ELECTRICAL CABLES QUIZ

The relative permittivity of rubber is

Between 5 and 7

None of the listed here

Between 2 and 3

Between 8 and 9

TRUE ANSWER : ?
YOUR ANSWER : ?

In capacitance grading of cables we use a _________ dielectric.

Homogeneous

Hygroscopic

Porous

Composite

TRUE ANSWER : ?
YOUR ANSWER : ?

The minimum dielectric stress in a cable is at

Conductor surface

Lead sheath

Armour

Bedding

TRUE ANSWER : ?
YOUR ANSWER : ?

In the cables, sheaths are used to

Prevent the moisture from entering the cable

Provide enough strength

None of the listed here

Provide proper insulation

TRUE ANSWER : ?
YOUR ANSWER : ?

The bedding on a cable consists of

None of the listed here

Both Hessian cloth and Jute

Jute

Hessian cloth

TRUE ANSWER : ?
YOUR ANSWER : ?

Low tension cables are generally used up to

1000 V

200 V

600 V

400 V

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following protects a cable against mechanical injury?

None of the listed here

Sheath

Bedding

Armouring

TRUE ANSWER : ?
YOUR ANSWER : ?

Empire tape is

Impregnated paper

None of the listed here

Vulcanized rubber

Varnished cambric

TRUE ANSWER : ?
YOUR ANSWER : ?

The thickness of metallic shielding on cables is usually

40 to 60 mm

3 to 5 mm

0.2 to 0.4 mm

0.04 mm

TRUE ANSWER : ?
YOUR ANSWER : ?

Solid type cables are considered unreliable beyond 66 kV because

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

Of corona loss between conductor and sheath material

Skin effect dominates on the conductor

Insulation may melt due to higher temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

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