Power System Objective Type Questions and answers


11.  Steady-state stability of a power system is improved by


   A. Reducing fault clearing time

   B. Using double circuit line instead of single circuit line

   C. Single pole switching

   D. Decreasing generator inertia


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B. Using double circuit line instead of single circuit line

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12.  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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13.  With fault clearing time, the transient stability limit of a power system


   A. Increases

   B. Decreases

   C. First increases then decreases

   D. First decreases and then increases


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B. Decreases

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14.  Transient disturbances are caused by


   A. Sudden load changes

   B. Switching operations

   C. Fault in the power system

   D. All of the above


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D. All of the above

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15.  The transient stability limit of a power system can be appreciably increased by introducing


   A. Series inductance

   B. Shunt inductance

   C. Series capacitance

   D. Shunt capacitance


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C. Series capacitance

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