ELECTRICAL CABLES QUIZ

Red

Black

Blue

Brown

To minimize temperature stresses

To avoid being unearthed easily due to removal of soil

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

All of the listed here

Same at the conductor and the sheath

Zero at the conductor as well as on the sheath

Maximum at the conductor and minimum at the sheath

Minimum at the conductor and maximum at the sheath

None of the listed here

Becomes double

Becomes one-fourth

Becomes one-half

Use of dielectrics of different permeabilities

Grading according to capacitance of cables per km length

Cables using single dielectric in different concentrations

Capacitance required to be introduced at different lengths to counter the effect of inductance

Both Steel tape and Galvanized steel wire

Galvanized steel wire

None of the listed here

Steel tape

Between 5 and 7

Between 8 and 9

None of the listed here

Between 2 and 3

Hysteresis and leakage losses only

Hysteresis, leakage, copper and friction losses

Hysteresis losses only

Hysteresis, leakage and copper losses only

Skin effect dominates on the conductor

Insulation may melt due to higher temperature

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

Of corona loss between conductor and sheath material

High mechanical strength

High dielectric strength

All of the listed here

low cost