Power System Operation and Control (2180909) MCQs

MCQs of Reactive Power and Voltage Control

Showing 31 to 30 out of 40 Questions
1 2 3 4
31.
In series line compensation, the degree of compensation is usually in the range of
(a) 0.3 to 0.8
(b) 0.2 to 0.6
(c) 0.1 to 0.5
(d) 0.2 to 0.25
Answer:

Option (a)

32.
In series line compensation, the voltage stability is
(a) Stable
(b) Improves
(c) Deteriorates
(d) Unstable
Answer:

Option (b)

33.
In shunt line compensation, the magnitude of critical receiving end voltage and critical power angle is
(a) Stable
(b) Deteriorates
(c) Improve
(d) Unstable
Answer:

Option (c)

34.
A static VAR compensator is a
(a) Voltage controlled shunt compensation device
(b) Current controlled shunt compensation device
(c) Voltage controlled series compensation device
(d) Current controlled series compensation device
Answer:

Option (a)

35.
Types of static VAR compensators are
(a) FC-TCR
(b) TSC-TCR
(c) Both a and b
(d) None of above
Answer:

Option (c)

36.
What is the result of frequency instability?
(a) Voltage collapse
(b) Frequency swings
(c) Tripping of generating units
(d) Both b and c
Answer:

Option (d)

37.
What is the main cause of voltage instability?
(a) Generators
(b) Transformers
(c) Loads
(d) Line losses
Answer:

Option (c)

38.
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
Answer:

Option (d)

39.
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
Answer:

Option (c)

40.
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
Answer:

Option (b)

Showing 31 to 30 out of 40 Questions
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