ELECTRICAL CABLES QUIZ

Which of the following protects a cable against mechanical injury?

Bedding

Sheath

None of the listed here

Armouring

TRUE ANSWER : ?
YOUR ANSWER : ?

A cable carrying alternating current has

Hysteresis, leakage, copper and friction losses

Hysteresis and leakage losses only

Hysteresis, leakage and copper losses only

Hysteresis losses only

TRUE ANSWER : ?
YOUR ANSWER : ?

The advantage of cables over overhead transmission lines is

Easy maintenance

Can be used in high voltage circuits

Can be used in congested areas

Low cost

TRUE ANSWER : ?
YOUR ANSWER : ?

The minimum dielectric stress in a cable is at

Conductor surface

Armour

Bedding

Lead sheath

TRUE ANSWER : ?
YOUR ANSWER : ?

High tension cables are generally used up to

132 kV

33 kV

66 kV

11 kV

TRUE ANSWER : ?
YOUR ANSWER : ?

A certain cable has an insulation of relative permittivity 4. If the insulation is replaced by one of relative permittivity 2, the capacitance of the cable will become

None of the listed here

Four times

One half

Double

TRUE ANSWER : ?
YOUR ANSWER : ?

Dielectric strength of rubber is around

30 kV/mm

5 kV/mm

25 kV/mm

15 kV/mm

TRUE ANSWER : ?
YOUR ANSWER : ?

The insulating material should have

All of the listed here

High resistivity

Low permittivity

High dielectric strength

TRUE ANSWER : ?
YOUR ANSWER : ?

In the cables, the location of fault is usually found out by comparing

The inductance of conductors

All of the listed here

The resistance of the conductor

The capacitances of insulated conductors

TRUE ANSWER : ?
YOUR ANSWER : ?

The thickness of the layer of insulation on the conductor, in cables, depends upon

Reactive power

Current carrying capacity

Voltage

Power factor

TRUE ANSWER : ?
YOUR ANSWER : ?

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