Reactance Relay Objective Type Questions and answers


41.  The structure used in reactance relay is


   A. Induction cup

   B. Double induction loop

   C. Single induction loop

   D. Either A or B


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D. Either A or B

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42.  Reactance relay is normally used for protection against


   A. Earth fault only

   B. Phase fault only

   C. Both earth and phase faults

   D. None of the above


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A. Earth fault only

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43.  The operating characteristics of the reactance relay in the complex impedance plane is a


   A. Circle with its origin at the centre of the R-X plane

   B. Circle passing through the origin

   C. Straight line passing through the origin

   D. Straight line parallel to the X axis


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D. Straight line parallel to the X axis

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44.  A reactance relay is


   A. Voltage restrained overcurrent relay

   B. Voltage restrained directional relay

   C. Directional restrained overcurrent relay

   D. Directional restrained over voltage relay


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C. Directional restrained overcurrent relay

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45.  Reactance relays are used for phase fault in.......line


   A. Short

   B. Medium

   C. Long

   D. All of the above


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A. Short

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