Power System Objective Type Questions and answers


1.  The over voltage surges in power systems me be caused by


   A. Lightning

   B. Resonance

   C. Switching

   D. All of the above


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D. All of the above

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2.  The critical clearing time of a fault is power system is related to


   A. Reactive power limit

   B. Short circuit limit

   C. Steady-state stability limit

   D. Transient stability limit


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D. Transient stability limit

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3.  Our system stability is least affected by


   A. Reactance of generator

   B. Input torque

   C. Losses

   D. Reactants of transmission line


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C. Losses

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4.  Which portion of the our system is least prone to faults?


   A. Alternator

   B. Transformer

   C. Overhead lines

   D. Underground cable


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A. Alternators

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5.  The domains of power system where directional overcurrent relay is indispensable are


   A. In case of parallel feeder protection

   B. In case of ring main feeder protection

   C. Both A and B

   D. None of the above


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C. Both A and B

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