ELECTRICAL CABLES QUIZ

Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ?

Impregnated paper

Compressed SF6 gas

Vulcanised rubber

Polyvinyle chloride

TRUE ANSWER : ?
YOUR ANSWER : ?

The relative permittivity of rubber is

Between 2 and 3

Between 5 and 7

None of the listed here

Between 8 and 9

TRUE ANSWER : ?
YOUR ANSWER : ?

The disadvantage with paper as insulating material is

None of the listed here

It has high capacitance

It is hygroscopic

It is an organic material

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PVC stands for

Positive voltage conductor

Post varnish conductor

Polyvinyl chloride

Pressed and varnished cloth

TRUE ANSWER : ?
YOUR ANSWER : ?

The insulating material for cables should

Be non-inflammable

Be acid proof

All of the listed here

Be non-hygroscopic

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Insulation layer

Sheath

Armour

Conductor surface

TRUE ANSWER : ?
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In single core cables armouring is not done to

Either of the listed here

Make it flexible

None of the listed here

Avoid excessive sheath losses

TRUE ANSWER : ?
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A cable carrying alternating current has

Hysteresis and leakage losses only

Hysteresis, leakage, copper and friction losses

Hysteresis, leakage and copper losses only

Hysteresis losses only

TRUE ANSWER : ?
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The current carrying capacity of cables in D.C. is more than that in A.C. mainly due to

Nonexistence of any stability limit

Absence of harmonics

None of the listed here

Smaller dielectric loss

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Copper as conductor for cables is used as

Hard drawn

Alloy with chromium

Hardened and tempered

Annealed

TRUE ANSWER : ?
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