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

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

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

14.  Transient disturbances are caused by

   A. Sudden load changes

   B. Switching operations

   C. Fault in the power system

   D. All of the above

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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