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Control Systems (ECE Perspective) – Multiple Choice Questions (MCQs)

13. A positive phase margin indicates that the system is:
- A. Unstable
- B. Marginally stable
- C. Stable
- D. Critically damped
14. The root locus plot shows the variation of the ________ of the characteristic equation as a system parameter (usually gain K) is varied.
- A. Poles
- B. Zeros
- C. Roots
- D. Asymptotes
15. Adding a pole to the open-loop transfer function of a system generally shifts the root locus towards the:
- A. Right half of s-plane
- B. Left half of s-plane
- C. Imaginary axis
- D. Origin
16. Adding a zero to the open-loop transfer function of a system generally shifts the root locus towards the:
- A. Right half of s-plane
- B. Left half of s-plane
- C. Imaginary axis
- D. Origin
17. A lead compensator is typically used to improve the ________ of a system.
- A. Steady-state error
- B. Transient response
- C. Noise rejection
- D. Cost
18. A lag compensator is typically used to improve the ________ of a system.
- A. Transient response
- B. Speed of response
- C. Steady-state error
- D. Bandwidth
19. Controllability of a system refers to the ability to drive the system from an initial state to any desired final state in finite time using an appropriate:
- A. Output
- B. Input
- C. Error
- D. Disturbance
20. Observability of a system refers to the ability to determine the internal states of the system from its:
- A. Input and output measurements
- B. Only input measurements
- C. Only output measurements
- D. System parameters
21. The step response of a first-order system is characterized by a single parameter known as the:
- A. Damping ratio
- B. Natural frequency
- C. Time constant
- D. Settling time
22. The maximum overshoot of a second-order system is primarily determined by its:
- A. Natural frequency
- B. Damping ratio
- C. Peak time
- D. Rise time
23. A system is critically damped when its damping ratio (ζ) is equal to:
- A. 0
- B. 0.5
- C. 1
- D. 2
24. The bandwidth of a control system is a measure of its:
- A. Accuracy
- B. Stability
- C. Speed of response
- D. Sensitivity

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Control Systems (ECE Perspective) – Multiple Choice Questions (MCQs)

13. A positive phase margin indicates that the system is:

14. The root locus plot shows the variation of the ________ of the characteristic equation as a system parameter (usually gain K) is varied.

15. Adding a pole to the open-loop transfer function of a system generally shifts the root locus towards the:

16. Adding a zero to the open-loop transfer function of a system generally shifts the root locus towards the:

17. A lead compensator is typically used to improve the ________ of a system.

18. A lag compensator is typically used to improve the ________ of a system.

19. Controllability of a system refers to the ability to drive the system from an initial state to any desired final state in finite time using an appropriate:

20. Observability of a system refers to the ability to determine the internal states of the system from its:

21. The step response of a first-order system is characterized by a single parameter known as the:

22. The maximum overshoot of a second-order system is primarily determined by its:

23. A system is critically damped when its damping ratio (ζ) is equal to:

24. The bandwidth of a control system is a measure of its:

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