control systems MCQs – Page 2

Practise focused control systems questions with marked answers for exam preparation and subject revision.

control systems Mcqs

21. The transient response, with feedback system_____________?
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A. rises quickly

B. decays slowly

C. rises slowly

D. decays quickly

22. A closed loop system is distinguished from open loop system by which of the following ?
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A. Input pattern

B. Servomechanism

C. Feedback

D. Output pattern

23. Which of the following is the output of a thermocouple ?
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A. Direct current

B. Alternating current

C. A.C. voltage

D. None of the above

E. D.C. voltage

24. When the initial conditions of a system are specified to be zero it implies that the system is________________?
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A. working normally with zero reference input

B. at rest without any energy stored in it

C. working normally with reference input

D. at rest but stores energy

25. Which of the following statements is correct for any closed loop system ?
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A. Only one of the static error co-efficients has a finite non-zero value

B. All the co-efficients can have zero value

C. All the co-efficients are always non-zero

D. None of the above

26. The transfer function technique is considered as inadequate under which of the following conditions ?
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A. Systems having multiple input disturbances

B. Systems having stability problems

C. Systems having complexities and non-linearities

D. All of the above

27. A.C. servomotor resembles_____________?
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A. universal motor

B. two phase induction motor

C. Three phase induction motor

D. direct current series motor

28. The temperature, under thermal and electrical system analogy, is considered analogous to_______________?
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A. charge

B. voltage

C. none of the above

D. capacitance

E. current

29. Which of the following is the best method for determining the stability and transient response ?
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A. None of the above

B. Nyquist plot

C. Bode plot

D. Root locus

30. Which of the following is the non-linearity caused by servomotor ?
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A. Saturation

B. Backlash

C. None of the above

D. Static friction

31. Static error coefficients are used as a measure of the effectiveness of closed loop systems for specified ___________ input signal?
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A. position

B. acceleration

C. velocity

D. all of the above

32. Velocity error constant of a system is measured when the input to the system is unit ___________ function?
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A. parabolic

B. step

C. impulse

D. ramp

33. Phase margin of a system is used to specify which of the following ?
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A. Absolute stability

B. Time response

C. Frequency response

D. Relative stability

34. The initial response when tne output is not equal to input is called_____________?
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A. Either of the above

B. Transient response

C. Error response

D. Dynamic response

35. In force-voltage analogy, velocity is analogous to______________?
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A. capacitance

B. current

C. charge

D. inductance

36. Which of the following devices is used for conversion of co-ordinates ?
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A. Synchro-resolver

B. Selsyn

C. Microsyn

D. Synchro-transformer

37. In a system zero initial condition means that______________?
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A. The system is working with zero stored energy

B. The system is working with zero reference signal

C. The system is at rest and no energy is stored in any of its components

38. The second derivative input signals modify which of the following ?
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A. None of the above

B. The time constant of the system

C. The gain of the system

D. Damping of the system

E. The time constant and suppress the oscillations

39. Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero ?
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A. The system is relatively stable

B. The system is highly stable

C. None of the above

D. The system is highly oscillatory

40. Pressure error can be measured by which of the following ?
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A. Differential bellows and straingauge

B. Strain gauge and potentiometer

C. Strain gauge

D. Selsyn

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