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

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

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

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

15.  HRC fuses provide best protection against

   A. Overload

   B. Reverse current

   C. Open circuits

   D. Short-circuits

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