Insulation Of Cable Multiple Choice Questions and Answers

11.  The insulation of the cable decreases with

   A. The increase in length of the insulation

   B. The decrease in the land of the insulation

   C.Both A and B

   D.None of the above

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

   A. Operating voltage

   B. Current to be carried

   C. Power factor

   D. both A and B

13.  The insulating material used for cables should have all of the following except

   A. High dielectric strength, high mechanical strength, high tensile strength and plasticity, high resistivity and high viscosity at impregnation temperature

   B. Low thermal coefficient, low permittivity, acid proof, non-inflammable and non-hygroscopic

   C. High water absorption

   D. capability of withstanding high rupturing voltages

14.  The insulation used in a cable designed for use on 1000 kVA is usually

   A.impregnated paper

   B.Compressed sf₆ gas

   C.PVC

   D.Any of the above

   E.None of the above

15.  With the rise in temperature, the insulation resistivity of a cable

   A. Remain unchanged

   B. Decreases linearly

   C.Increases linearly

   D.Reduces exponentially

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