ELECTRICAL CABLES QUIZ

The relative permittivity of rubber is

None of the listed here

Between 8 and 9

Between 2 and 3

Between 5 and 7

TRUE ANSWER : ?
YOUR ANSWER : ?

In cables the charging current

Lags the voltage by 90°

Leads the voltage by 90°

Leads the voltage by 180°

Lags the voltage by 180°

TRUE ANSWER : ?
YOUR ANSWER : ?

Underground cables are laid at sufficient depth

To minimize the effect of shocks and vibrations due to gassing vehicles, etc.

All of the listed here

To avoid being unearthed easily due to removal of soil

To minimize temperature stresses

TRUE ANSWER : ?
YOUR ANSWER : ?

The surge resistance of cable is

100 ohms

50 ohms

500 ohms

5 ohms

TRUE ANSWER : ?
YOUR ANSWER : ?

The minimum dielectric stress in a cable is at

Armour

Bedding

Conductor surface

Lead sheath

TRUE ANSWER : ?
YOUR ANSWER : ?

The breakdown voltage of a cable depends on

Presence of moisture

Time of application of the voltage

Working temperature

All of the listed here

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 : ?

Conduit pipes are normally used to protect ________ cables.

All of the listed here

Unsheathed cables

Armoured

PVC sheathed cables

TRUE ANSWER : ?
YOUR ANSWER : ?

High tension cables are generally used up to

66 kV

11 kV

132 kV

33 kV

TRUE ANSWER : ?
YOUR ANSWER : ?

In the cables, sheaths are used to

Provide proper insulation

Prevent the moisture from entering the cable

None of the listed here

Provide enough strength

TRUE ANSWER : ?
YOUR ANSWER : ?

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