MCQOPTIONS
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MCQOPTIONS
This section includes 53 Mcqs, each offering curated multiple-choice questions to sharpen your Control Systems knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
" A.C. servomotor resembles" |
| A. | " Two phase induction motor" |
| B. | " Three phase induction motor" |
| C. | " Direct current series motor" |
| D. | " Universal motor" |
| Answer» B. " Three phase induction motor" | |
| 2. |
" The differential term in the riccati equation in infinite regulator is:" |
| A. | " Finite" |
| B. | " Positive" |
| C. | " Infinite" |
| D. | " Zero" |
| Answer» E. | |
| 3. |
" A closed loop system is distinguished from open loop system by which of the following?" |
| A. | " Servomechanism" |
| B. | " Feedback" |
| C. | " Output pattern" |
| D. | " Input pattern" |
| Answer» C. " Output pattern" | |
| 4. |
" Tracking problem can be in:" |
| A. | " Infinite state regulators" |
| B. | " Finite state regulator" |
| C. | " Sub-optimal state regulators" |
| D. | " Non-linear regulators" |
| Answer» D. " Non-linear regulators" | |
| 5. |
" The position and velocity errors of a type-2 system are :" |
| A. | " Constant, constant" |
| B. | " Constant, infinity" |
| C. | " Zero, constant" |
| D. | " Zero, zero" |
| Answer» D. " Zero, zero" | |
| 6. |
" Pneumatic controller" |
| A. | " Flexible operation" |
| B. | " High torque high speed operation" |
| C. | " Fire and explosion proof operation" |
| D. | " No leakage" |
| Answer» D. " No leakage" | |
| 7. |
" The method of choosing compensator is the configuration must be:" |
| A. | " Forward path" |
| B. | " Cascade and feedback compensation" |
| C. | " Feed forward configuration" |
| D. | " All of the mentioned" |
| Answer» E. | |
| 8. |
" Hydraulic controller:" |
| A. | " Flexible operation" |
| B. | " High torque high speed operation" |
| C. | " Fire and explosion proof operation" |
| D. | " No leakage" |
| Answer» C. " Fire and explosion proof operation" | |
| 9. |
" For minimizing the transfer function the condition is :" |
| A. | " Second differentiation of the function must be zero" |
| B. | " Second differentiation of the function must be positive" |
| C. | " Second differentiation of the function must be negative" |
| D. | " Second differentiation of the function must be complex" |
| Answer» D. " Second differentiation of the function must be complex" | |
| 10. |
" As a result of introduction of negative feedback which of the following will not decrease?" |
| A. | " Band width" |
| B. | " Overall gain" |
| C. | " Distortion" |
| D. | " Instability" |
| Answer» C. " Distortion" | |
| 11. |
" Which one of the following statement is correct?A plant controlled by a proportional controller. If a time delay element is introduced in the loop its:" |
| A. | " Phase margin remains the same" |
| B. | " Phase margin increases" |
| C. | " Phase margin decreases" |
| D. | " Gain margin increases" |
| Answer» D. " Gain margin increases" | |
| 12. |
" Which of the following should be done to make an unstable system stable?" |
| A. | " The gain of the system should be decreased" |
| B. | " The gain of the system should be increased" |
| C. | " The number of poles to the loop transfer function should be increased" |
| D. | " The number of zeros to the loop transfer function should be increased" |
| Answer» C. " The number of poles to the loop transfer function should be increased" | |
| 13. |
" __________increases the steady state accuracy." |
| A. | " Integrator" |
| B. | " Differentiator" |
| C. | " Phase lead" |
| D. | " Phase lag" |
| Answer» B. " Differentiator" | |
| 14. |
" The output of the system is considered near :" |
| A. | " 1" |
| B. | " 2" |
| C. | " 3" |
| D. | " 0" |
| Answer» E. | |
| 15. |
" Which one of the following compensation is required for improving the transient response of the system?" |
| A. | " Phase lead compensation" |
| B. | " Phase lag compensation" |
| C. | " Gain compensation" |
| D. | " Both phase lag compensation and gain compensation" |
| Answer» B. " Phase lag compensation" | |
| 16. |
" _______________ is a closed loop system." |
| A. | " Auto-pilot for an aircraft" |
| B. | " Direct current generator" |
| C. | " Car starter" |
| D. | " Electric switch" |
| Answer» B. " Direct current generator" | |
| 17. |
" The special case of the tracking problem with input equal to zero:" |
| A. | " Free response" |
| B. | " Regulator problem" |
| C. | " Forced response" |
| D. | " Output regulator problem" |
| Answer» E. | |
| 18. |
" For the stable system in discrete optimal control systems:" |
| A. | " Poles must lie outside the unit circle" |
| B. | " Poles must lie within the unit circle" |
| C. | " Poles must be on the unit circle" |
| D. | " Pole must be in infinity" |
| Answer» C. " Poles must be on the unit circle" | |
| 19. |
" The regulators that convert the non-linear stability into linear stability:" |
| A. | " Linear" |
| B. | " Sub-optimal" |
| C. | " Finite" |
| D. | " Infinite" |
| Answer» E. | |
| 20. |
" The optimization method based on dynamic programming views :" |
| A. | " Control problem as the multistage decision problem" |
| B. | " Control input as a time sequence of decisions" |
| C. | " A sampled data system gives rise to sequence of transformations of the original state vector" |
| D. | " All of the mentioned" |
| Answer» E. | |
| 21. |
" In Infinite regulator the optimal control cannot be differentiated from other controls." |
| A. | " True" |
| B. | " False" |
| Answer» B. " False" | |
| 22. |
" Riccati equation is formed by using:" |
| A. | " Output regulator problem" |
| B. | " Finite state regulator problem" |
| C. | " Infinite state regulator problem" |
| D. | " Tracking problem" |
| Answer» E. | |
| 23. |
" In tracking problem the parameter reduced is :" |
| A. | " Error" |
| B. | " Output" |
| C. | " Input" |
| D. | " State" |
| Answer» B. " Output" | |
| 24. |
" Z-transform is used in:" |
| A. | " Continuous optimal control problem" |
| B. | " Discrete optimal problem" |
| C. | " Control systems" |
| D. | " None of the mentioned" |
| Answer» C. " Control systems" | |
| 25. |
" A conditionally stable system exhibits poor stability at :" |
| A. | " Low frequencies" |
| B. | " Reduced values of open loop gain" |
| C. | " Increased values of open loop gain" |
| D. | " High frequencies" |
| Answer» C. " Increased values of open loop gain" | |
| 26. |
" In case of type-1 system steady state acceleration is :" |
| A. | " Unity" |
| B. | " Infinity" |
| C. | " Zero" |
| D. | " 10" |
| Answer» C. " Zero" | |
| 27. |
" The type 1 system has ______ at the origin." |
| A. | " No pole" |
| B. | " Net pole" |
| C. | " Simple pole" |
| D. | " Two poles" |
| Answer» D. " Two poles" | |
| 28. |
" Velocity error constant of a system is measured when the input to the system is unit _______ function." |
| A. | " Parabolic" |
| B. | " Ramp" |
| C. | " Impulse" |
| D. | " Step" |
| Answer» C. " Impulse" | |
| 29. |
" The limitation of the transfer function approach are:" |
| A. | " The spectral factorization becomes quite complex" |
| B. | " It is restricted to the systems with all performance index" |
| C. | " Multi input and multi output systems are not obvious" |
| D. | " It is useful for time varying and linear systems" |
| Answer» B. " It is restricted to the systems with all performance index" | |
| 30. |
" If a step function is applied to the input of a system and the output remains below a certain level for all the time, the system is :" |
| A. | " Not necessarily stable" |
| B. | " Stable" |
| C. | " Unstable" |
| D. | " Always unstable" |
| Answer» B. " Stable" | |
| 31. |
" If Q is positive semi- definite:" |
| A. | " The optimal closed loop system is asymptotically stable" |
| B. | " The asymptotic stability is not guaranteed" |
| C. | " The system is stable" |
| D. | " The system is unstable" |
| Answer» C. " The system is stable" | |
| 32. |
" Performance index can become infinite if:" |
| A. | " One or more state are uncontrollable" |
| B. | " The uncontrollable states are uncontrollable" |
| C. | " The unstable states are reflected in system performance index" |
| D. | " All of the mentioned" |
| Answer» E. | |
| 33. |
" For output regulator problem in performance index the parameter which is set to zero:" |
| A. | " Input vector" |
| B. | " Output vector" |
| C. | " Control vector" |
| D. | " State vector" |
| Answer» C. " Control vector" | |
| 34. |
" The choice of control vector is considered decision of interest in :" |
| A. | " Multistage process of N stages" |
| B. | " Minimizing the performance index" |
| C. | " Optimal policy or sequence" |
| D. | " All of the mentioned" |
| Answer» E. | |
| 35. |
" Which of the following devices are commonly used as error detectors in instruments?" |
| A. | " Vern stats" |
| B. | " Microsyn" |
| C. | " Resolvers" |
| D. | " All of the mentioned" |
| Answer» E. | |
| 36. |
" For the stability in optimal control poles of the transfer function must be :" |
| A. | " Located on the right half of s plane" |
| B. | " Left half of s plane" |
| C. | " On the s plane" |
| D. | " None of the mentioned" |
| Answer» C. " On the s plane" | |
| 37. |
" When some of the states are inaccessible, then we may set the feedback coefficients equal to zero." |
| A. | " True" |
| B. | " False" |
| Answer» B. " False" | |
| 38. |
" Which of the following is the best method for determining the stability and transient response?" |
| A. | " Root locus" |
| B. | " Bode plot" |
| C. | " Nyquist plot" |
| D. | " None of the mentioned" |
| Answer» B. " Bode plot" | |
| 39. |
" In finite time regulator:" |
| A. | " There is no restriction on the controllability of the plant" |
| B. | " Performance index is infinite" |
| C. | " Instability imposes problem in finite-interval control" |
| D. | " No restriction on controllability and performance index" |
| Answer» B. " Performance index is infinite" | |
| 40. |
" The main step for solving the optimal control problem:" |
| A. | " Transfer function of system which is optimal with respect to the given performance criterion" |
| B. | " Compensators for the system" |
| C. | " Minimizing the quadratic function" |
| D. | " All of the mentioned" |
| Answer» E. | |
| 41. |
" By which of the following the control action is determined when a man walks along a path?" |
| A. | " Brain" |
| B. | " Hands" |
| C. | " Legs" |
| D. | " Eyes" |
| Answer» E. | |
| 42. |
" Any externally introduced signal affecting the controlled output is called a" |
| A. | " Feedback" |
| B. | " Stimulus" |
| C. | " Signal" |
| D. | " Gain control" |
| Answer» C. " Signal" | |
| 43. |
" Electronic Controller:" |
| A. | " Flexible operation" |
| B. | " High torque high speed operation" |
| C. | " Fire and explosion proof operation" |
| D. | " No leakage" |
| Answer» B. " High torque high speed operation" | |
| 44. |
" The type 0 system has ______ at the origin." |
| A. | " No pole" |
| B. | " Net pole" |
| C. | " Simple pole" |
| D. | " Two poles" |
| Answer» B. " Net pole" | |
| 45. |
" In infinite time regulator for the final time is:" |
| A. | " t1" |
| B. | " t0" |
| C. | " Infinite" |
| D. | " Zero" |
| Answer» D. " Zero" | |
| 46. |
" When time and the state variables tend to infinity then the system becomes:" |
| A. | " Unstable" |
| B. | " Stable" |
| C. | " Marginally stable" |
| D. | " Conditionally stable" |
| Answer» C. " Marginally stable" | |
| 47. |
" For suboptimal control the value of R is assumed to be:" |
| A. | " Positive definite" |
| B. | " Non-positive definite" |
| C. | " Negative" |
| D. | " Complex" |
| Answer» C. " Negative" | |
| 48. |
" The type 2 system has at the origin." |
| A. | " No net pole" |
| B. | " Net pole" |
| C. | " Simple pole" |
| D. | " Two poles" |
| Answer» E. | |
| 49. |
" ______________ is a part of the human temperature control system." |
| A. | " Digestive system" |
| B. | " Perspiration system" |
| C. | " Ear" |
| D. | " Leg movement" |
| Answer» C. " Ear" | |
| 50. |
" The value of K must further follow the following constraint that the closed loop system must be:" |
| A. | " Asymptotically stable" |
| B. | " Stable" |
| C. | " Marginally stable" |
| D. | " Conditionally stable" |
| Answer» B. " Stable" | |