Power System Planning and Design (2180903) MCQs

MCQs of Power system improvement

Showing 11 to 20 out of 26 Questions
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11.
What is transient stability limit?
(a) The maximum flow of power through a particular point in the power system without loss of stability when small disturbances occur.
(b) The maximum power flow possible through a particular component connected in the power system.
(c) The maximum flow of power through a particular point in the power system without loss of stability when large and sudden disturbances occur.
(d) All of above
Answer:

Option (c)

12.
Value of transient stability limit is
(a) Higher than steady state stability limit
(b) Lower than steady state stability limit
(c) Dependent upon the severity of load
(d) None of above
Answer:

Option (b)

13.
How can we check upon the transient stability of a power system?
(a) By checking variation in load angle
(b) By checking variation of real power with load angle
(c) Checking variation in load angle and real power
(d) Checking variation in load angle or real power
Answer:

Option (c)

14.
How can we improve the steady state stability of the synchronous generator for a better performance?
(a) Increasing the excitation
(b) Increasing reactance
(c) Decreasing moment of inertia
(d) Increasing moment of inertia
Answer:

Option (a)

15.
The measure to improve the transient stability of the power system during the unbalanced or unsymmetrical fault can be taken as
(a) Single pole switching of CB
(b) Excitation control
(c) Phase shifting transformer
(d) Increasing turbine valve opening
Answer:

Option (a)

16.
What does the steady state stability of a power system signify?
(a) Maintaining the rated voltage
(b) Maintaining rated frequency
(c) Maintaining a synchronization between machines and tie-lines
(d) All of above
Answer:

Option (c)

17.
________________ are used to provide compensation at the receiving end of a transmission line so as to improve its voltage profile.
(a) Condensers
(b) Resistors
(c) Reactors
(d) All of above
Answer:

Option (a)

18.
Shunt compensation in an EHV line is used to improve
(a) Stability and fault level
(b) Fault level and voltage profile
(c) Voltage profile and stability
(d) All of above
Answer:

Option (b)

19.
Series capacitor is used in a transmission line to
(a) Compensate the voltage drop
(b) Reduce line losses
(c) Limit short-circuit current
(d) Improve load power factor
Answer:

Option (a)

20.
Voltage of a transmission line can be controlled by
(a) Excitation control
(b) Induction regulator
(c) Reactive VAR injection
(d) All of above
Answer:

Option (c)

Showing 11 to 20 out of 26 Questions
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