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/ Interview Guides / Control System MCQ With Answers

Control System MCQ With Answers

Last Updated: Jan 08, 2024
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A system that consists of several components connected to perform a specific function in which the output is controlled by input is known as a Control system.

There are two types of systems:

  • Open-loop control system:
    • Advantages:
      • Simple and economical
      • Easier to construct
      • Stable
    • Disadvantages:
      • Inaccurate
      • Changes in the output are not carried automatically
  • Closed-loop systems:
    • Advantages:
      • Accurate
      • Less affected by noise
    • Disadvantages:
      • Complete and costlier
      • Feedback reduces the overall gain of the system
      • Stability is a major problem.

Types of control systems

  • Linear system
  • Non-linear systems
  • Time variant system
  • Time invariant system
  • Linear time-variant system
  • Linear time-invariant system

Control System MCQs

1. 

To which of the following does a major part of the automatic control theory apply?

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2. 

What is a traffic light system?

3. 

Select the correct definition of Loop gain among the following.

4. 

Identify the impulse response of an RL circuit.

5. 

What is the gain margin of the second-order system?

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6. 

Among the following, identify the most powerful controller.

7. 

Among the following, identify the controller which can handle fast process load changes.

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8. 

Choose whether the following statement is true or false: The mechanism of control of body temperature is a non-feedback system.

9. 

Which of the following is higher in the closed system than the open-loop control system?

10. 

Choose whether the following statement is true or false: Effects of noise and disturbance on system performance can be reduced by feedback.

11. 

In which of the following systems can multiple signals be used?

12. 

Choose the correct option among the following. An originally stable system can become unstable or more stable due to feedback.

13. 

Regenerative feedback indicates feedback with?

14. 

Identify the output of feedback control among the following.

15. 

Identify one of the possible effects of a control system with excessive noise.

16. 

What is meant by zero initial condition for a system?

17. 

What is the transfer function used for finding?

18. 

Among the following factors, identify the factors on which sensitivity of the closed-loop system to gain changes and load disturbances depend.

19. 

What should be the damping ratio for a desirable transient response of a second-order system?

20. 

Identify the correct feature of the minimum phase system.

21. 

Which of the following will be obtained by equating the denominator of the transfer function to 0?

22. 

Identify the definition of maximum overshoot.

23. 

Which of the following system conditions is generally preferred?

24. 

Sensitivity to parameter  ________ in feedback system.

25. 

 What is the damping ratio, if overshoot is excessive?

26. 

The term “controller” denoted?

27. 

What is the automated control system called where output is variable?

28. 

Identify among the following which is used to obtain output position in a position control system.

29. 

The damping ratio of a system where the phase margin is 45 degrees is?

30. 

Choose the correct definition of eigenvalues of a matrix.

31. 

Identify the element among the following which is not used in an automatic control system?

32. 

Identify the nature of the bandwidth suitable for a good control system.

33. 

Identify the incorrect feature of a good control system.

34. 

In which of the following systems is an effect of feedback on sensitivity minimum?

35. 

Where is sampling necessary?

36. 

What is the control system known as where the system works under unknown random actions?

37. 

The output of control is given to?

38. 

State whether True or False: A feedback control system is a high pass filter.

39. 

What do the peak overshoot and damping ratios measure?

40. 

Total types of a control system are?

41. 

Identify the disadvantages of closed-loop control systems.

42. 

Identify the advantages of a closed-loop control system.

43. 

What is the system called where output is varying with time?

44. 

Identify the correct formula for the transfer function of positive feedback.

45. 

Identify the term which is a point representing a variable or signal.

46. 

Total types of time-domain analysis are?

47. 

Identify the term which is a node having both incoming and outgoing branches.

48. 

Identify the features of the test signal.

49. 

Total types of static error constants are?

50. 

To which of the following is the state-space method applicable?

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