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

25. The Nyquist plot is a polar plot of the open-loop transfer function G(jω)H(jω) as ω varies from:
- A. 0 to ∞
- B. 0 to -∞
- C. -∞ to ∞
- D. 0 to 2π
26. For a type 0 system
- A. the steady-state error to a unit step input is:
- B. Zero
- C. Infinite
- D. Constant
27. For a type 1 system
- A. the steady-state error to a unit step input is:
- B. Zero
- C. Infinite
- D. Constant
28. For a type 1 system
- A. the steady-state error to a unit ramp input is:
- B. Zero
- C. Infinite
- D. Constant
29. The phenomenon of "offset" is typically associated with which type of controller?
- A. Proportional
- B. Integral
- C. Derivative
- D. PID
30. The robustness of a control system refers to its ability to maintain desired performance despite:
- A. Changes in input
- B. Noise
- C. Parameter variations and disturbances
- D. External interference
31. The effect of negative feedback on bandwidth is usually:
- A. Decrease
- B. Increase
- C. No change
- D. Makes it zero
32. The effect of negative feedback on system gain is usually:
- A. Increase
- B. Decrease
- C. No change
- D. Makes it infinite
33. The principle of superposition is applicable to:
- A. Linear systems only
- B. Non-linear systems only
- C. Both linear and non-linear systems
- D. Time-variant systems
34. The signal flow graph method for finding the overall gain of a system uses:
- A. Mason's gain formula
- B. Block diagram reduction
- C. Routh-Hurwitz criterion
- D. Nyquist criterion
35. The damping ratio (ζ) of a system determines the ________ of its transient response.
- A. Speed
- B. Oscillatory nature
- C. Accuracy
- D. Final value
36. The frequency at which the magnitude of the open-loop transfer function is 0 dB is called the:
- A. Phase crossover frequency
- B. Gain crossover frequency
- C. Resonant frequency
- D. Cut-off frequency

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

25. The Nyquist plot is a polar plot of the open-loop transfer function G(jω)H(jω) as ω varies from:

26. For a type 0 system

27. For a type 1 system

28. For a type 1 system

29. The phenomenon of "offset" is typically associated with which type of controller?

30. The robustness of a control system refers to its ability to maintain desired performance despite:

31. The effect of negative feedback on bandwidth is usually:

32. The effect of negative feedback on system gain is usually:

33. The principle of superposition is applicable to:

34. The signal flow graph method for finding the overall gain of a system uses:

35. The damping ratio (ζ) of a system determines the ________ of its transient response.

36. The frequency at which the magnitude of the open-loop transfer function is 0 dB is called the:

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