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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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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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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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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