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


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D. All of the above

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42.  Breakdown of cable insulation may occur due to


   A.Thermal instability

   B. Puncture

   C. Tracking

   D. Any of the above


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D. Any of the above

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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


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A. Smaller hysteresis losses

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44.  Sulphur hexafluoride cable is insulated by


   A. Impregnated paper

   B. High-pressure oil

   C. PVC

   D. Any of the above

   E. Compressed gas


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E. Compressed gas

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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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D. Increasing the insulation resistance

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