Cable Multiple Choice Questions and Answers

41.  The breakdown voltage of a cable depends upon

   A. Presence of moisture

   B. Operating temperature

   C. Time of application of the voltage

   D. All of the above

42.  Breakdown of cable insulation may occur due to

   A.Thermal instability

   B. Puncture

   C. Tracking

   D. Any of the above

43.  The current carrying capacity of cables in DC is more than that in AC. It is mainly due to

   A. Smaller hysteresis losses

   B. Absence of harmonics

   C. Absence of ripples

   D. Either A or B

44.  Sulphur hexafluoride cable is insulated by

   A. Impregnated paper

   B. High-pressure oil

   C. PVC

   D. Any of the above

   E. Compressed gas

45.  The power factor of an open ended cable can be improved by

   A. Increasing the capacitance

   B. Decreasing the capacitance

   C. Increasing the conductor resistance

   D. Increasing the insulation resistance

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