Polyethylene has very poor dielectric and ageing properties

Related Mcqs:

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

A. reactive power B. power factor C. voltage D. current carrying capacity...

Dielectric strength of rubber is around____________?

A. 5 kV/mm B. 15 kV/mm C. 30 kV/mm D. 200 kV/mm...

High tension cables are generally used up to_____________?

A. 11kV B. 33kV C. 66 kV D. 132 kV...

The breakdown of insulation of the cable can be avoided economically by the use of___________?

A. inter-sheaths B. insulating materials with different dielectric constants C. both (A) and (B) D. none of the above...

Underground cables are laid at sufficient depth___________?

A. to minimise temperature stresses B. to avoid being unearthed easily due to removal of soil C. to minimize the effect of shocks and vibrations due to gassing vehicles, etc D. for all of the above reasons...