High Rupturing Capacity (HRC) Fuse Multiple Choice Questions and Answers


11.  In HRC fuse the time between cut-off and final current zero is called the


   A. Pre-arcing time

   B. Arcing time

   C. Total operating time

   D. None of the above


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B. Arcing time

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12.  HRC fuse as compared to a rewireable fuse has


   A. No ageing effect

   B. High speed of operation

   C. High rupturing capacity

   D. All of the above


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D. All of the above

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13.  If a combination of HRC fuse and a circuit breaker is employed, the circuit breaker operates for


   A. Short circuit current

   B. Low overload currents

   C. Under all abnormal currents

   D. All of the above


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B. Low overload currents

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14.  By which of the following methods major portion of the heat generated in a HRC fuse is dissipated ?


   A. Radiation

   B. Convection

   C. Conduction

   D. None of the above


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C. Conduction

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15.  HRC fuses provide best protection against


   A. Overload

   B. Reverse current

   C. Open circuits

   D. Short-circuits


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D. Short circuits

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