Power System Objective Type Questions and answers

6.  The stability of the power system is not affected by

   A. Generator reactance

   B. Line reactance

   C. Excitation of generators

   D. Line losses

7.  The Power Systems are operated with power angle around

   A. 10^o

   B. 30^o

   C. 70^o

   D. 80^o

8.  Power system stability is defined as

   A. That attribute of the system or part of the system which enables it to develop restoring forces between the elements there of equal or greater than disturbing forces so as to restore a state of equilibrium between the elements

   B. The maximum power flow possible through some particular point in the system when the entire or part of the system is disturbed

   C. Both A and B

   D. Neither A or B

9.  Stability limit of a power system is defined as

   A. That attribute of the system or part of the system which enables it to develop restoring forces between the elements there of equal or greater than disturbing forces so as to restore a state of equilibrium between the elements

   B. The maximum power flow possible through some particular point in the system when the entire or part of the system is disturbed

   C. Both A and B

   D. Neither A or B

10.  Steady-state stability of a power system is the ability of the power system to

   A. Maintain voltage at the rated voltage level

   B. Maintain frequency exactly at 50 Hz

   C. Maintain a spinning reserve margin at all times

   D. Maintain synchronism between machines and on external tie lines

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