MCQOPTIONS
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MCQOPTIONS
This section includes 110 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The first order control system, which is well designed, has a |
| A. | mall bandwidth |
| B. | egative time constant |
| C. | arge negative transfer function pole |
| D. | one of the above |
| Answer» D. one of the above | |
| 2. |
A signal other than the reference input that tends to affect the value of controlled variable is known as |
| A. | isturbance |
| B. | ommand |
| C. | ontrol element |
| D. | eference input |
| Answer» B. ommand | |
| 3. |
Which of the following is the input to a controller ? |
| A. | ervo signal |
| B. | esired variable value |
| C. | rror signal |
| D. | ensed signal |
| Answer» D. ensed signal | |
| 4. |
Which of the following is the non-linearity caused by servomotor ? |
| A. | tatic friction |
| B. | acklash |
| C. | aturation |
| D. | one of the above |
| Answer» D. one of the above | |
| 5. |
Which of the following devices are commonly used as error detectors in instruments ? |
| A. | ernistats |
| B. | icrosyns |
| C. | esolvers |
| D. | ny of the above |
| Answer» E. | |
| 6. |
The transfer function technique is considered as inadequate under which of the following conditions ? |
| A. | ystems having complexities and non-linearities |
| B. | ystems having stability problems |
| C. | ystems having multiple input disturbances |
| D. | ll of the above |
| Answer» E. | |
| 7. |
Is the reference input minus the primary feedback. |
| A. | anipulated variable |
| B. | ero sequence |
| C. | ctuating signal |
| D. | rimary feedback |
| Answer» D. rimary feedback | |
| 8. |
A closed loop system is distinguished from open loop system by which of the following ? |
| A. | ervomechanism |
| B. | eedback |
| C. | utput pattern |
| D. | nput pattern |
| Answer» C. utput pattern | |
| 9. |
The term backlash is associated with |
| A. | ervomotors |
| B. | nduction relays |
| C. | ear trains |
| D. | ny of the above |
| Answer» D. ny of the above | |
| 10. |
an be extended to systems which are time-varying ? |
| A. | ode-Nyquist stability methods |
| B. | ransfer functions |
| C. | oot locus design |
| D. | tate model representatives |
| Answer» E. | |
| 11. |
Technique gives quick transient and stability response |
| A. | oot locus |
| B. | ode |
| C. | yquist |
| D. | ichols |
| Answer» B. ode | |
| 12. |
Any externally introduced signal affecting the controlled output is called a |
| A. | eedback |
| B. | timulus |
| C. | ignal |
| D. | ain control |
| Answer» C. ignal | |
| 13. |
The type-2 system has ________ at the origin. |
| A. | o net pole |
| B. | et pole |
| C. | imple pole |
| D. | wo poles |
| Answer» E. | |
| 14. |
Signal will become zero when the feedback signal and reference signs are equal. |
| A. | nput |
| B. | ctuating |
| C. | eedback |
| D. | eference |
| Answer» C. eedback | |
| 15. |
Is not a final control element. |
| A. | ontrol valve |
| B. | otentiometer |
| C. | lectropneumatic converter |
| D. | ervomotor |
| Answer» C. lectropneumatic converter | |
| 16. |
Spring constant in force-voltage analogy is analogous to |
| A. | apacitance |
| B. | eciprocal of capacitance |
| C. | urrent |
| D. | esistance |
| Answer» C. urrent | |
| 17. |
The initial response when tne output is not equal to input is called |
| A. | ransient response |
| B. | rror response |
| C. | ynamic response |
| D. | ither of the above |
| Answer» B. rror response | |
| 18. |
A.C. servomotor is basically a |
| A. | niversal motor |
| B. | ingle phase induction motor |
| C. | wo phase induction motor |
| D. | hree phase induction motor |
| Answer» D. hree phase induction motor | |
| 19. |
A good control system has all the following features except%! |
| A. | good stability |
| B. | slow response |
| C. | good accuracy |
| D. | sufficient power handling capacity |
| Answer» C. good accuracy | |
| 20. |
The first order control system, which is well designed, has a%! |
| A. | small bandwidth |
| B. | negative time constant |
| C. | large negative transfer function pole |
| D. | none of the above |
| Answer» D. none of the above | |
| 21. |
A signal other than the reference input that tends to affect the value of controlled variable is known as%! |
| A. | Disturbance |
| B. | Command |
| C. | Control element |
| D. | Reference input |
| Answer» B. Command | |
| 22. |
The phase lag produced by transportation relays%! |
| A. | is independent of frequency |
| B. | |
| C. | increases linearly with frequency |
| Answer» D. | |
| 23. |
A controller, essentially, is a%! |
| A. | sensor |
| B. | clipper |
| C. | comparator |
| D. | amplifier |
| Answer» D. amplifier | |
| 24. |
The on-off controller is a _____ system.%! |
| A. | digital |
| B. | linear |
| C. | non-linear |
| D. | discontinuous |
| Answer» D. discontinuous | |
| 25. |
Which of the following statements is not necessarily correct for open control system ?%! |
| A. | Input command is the sole factor responsible for providing the control action |
| B. | Presence of non-linearities causes malfunctioning |
| C. | Less expensive |
| D. | Generally free from problems of non-linearities |
| Answer» C. Less expensive | |
| 26. |
Which of the following devices are commonly used as error detectors in instruments ?%! |
| A. | Vernistats |
| B. | Microsyns |
| C. | Resolvers |
| D. | Any of the above |
| Answer» E. | |
| 27. |
With feedback _____ increases.%! |
| A. | system stability |
| B. | sensitivity |
| C. | gain |
| D. | effects of disturbing signals |
| Answer» B. sensitivity | |
| 28. |
A control system with excessive noise, is likely to suffer from%! |
| A. | saturation in amplifying stages |
| B. | loss of gain |
| C. | vibrations |
| D. | oscillations |
| Answer» B. loss of gain | |
| 29. |
A control system in which the control action is somehow dependent on the output is known as%! |
| A. | Closed loop system |
| B. | Semiclosed loop system |
| C. | Open system |
| D. | None of the above |
| Answer» B. Semiclosed loop system | |
| 30. |
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 | |
| 31. |
*/*_Signal will become zero when the feedback signal and reference signs are equal.? |
| A. | Input |
| B. | Actuating |
| C. | Feedback |
| D. | Reference |
| Answer» C. Feedback | |
| 32. |
*/*_Regenerative feedback implies feedback with? |
| A. | oscillations |
| B. | step input |
| C. | negative sign |
| D. | positive sign |
| Answer» E. | |
| 33. |
*/*_Spring constant in force-voltage analogy is analogous to? |
| A. | capacitance |
| B. | reciprocal of capacitance |
| C. | current |
| D. | resistance |
| Answer» C. current | |
| 34. |
*/*_Which of the following is the input to a controller ?? |
| A. | Servo signal |
| B. | Desired variable value |
| C. | Error signal |
| D. | Sensed signal |
| Answer» B. Desired variable value | |
| 35. |
*/*_A control system with excessive noise, is likely to suffer from? |
| A. | saturation in amplifying stages |
| B. | loss of gain |
| C. | vibrations |
| D. | oscillations |
| Answer» B. loss of gain | |
| 36. |
*/*_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 | |
| 37. |
*/*_A control system in which the control action is somehow dependent on the output is known as? |
| A. | Closed loop system |
| B. | Semiclosed loop system |
| C. | Open system |
| D. | None of the above |
| Answer» B. Semiclosed loop system | |
| 38. |
*/*_With feedback _____ increases.? |
| A. | system stability |
| B. | sensitivity |
| C. | gain |
| D. | effects of disturbing signals |
| Answer» B. sensitivity | |
| 39. |
_ Is not a final control element.$? |
| A. | Control valve |
| B. | Potentiometer |
| C. | Electropneumatic converter |
| D. | Servomotor |
| Answer» C. Electropneumatic converter | |
| 40. |
_ A.C. servomotor is basically a$? |
| A. | universal motor |
| B. | single phase induction motor |
| C. | two phase induction motor |
| D. | three phase induction motor |
| Answer» D. three phase induction motor | |
| 41. |
_ The initial response when tne output is not equal to input is called$? |
| A. | Transient response |
| B. | Error response |
| C. | Dynamic response |
| D. | Either of the above |
| Answer» B. Error response | |
| 42. |
_ The output of a feedback control system must be a function of$? |
| A. | reference and output |
| B. | reference and input |
| C. | input and feedback signal |
| D. | output and feedback signal |
| Answer» B. reference and input | |
| 43. |
_ The transfer function technique is considered as inadequate under which of the following conditions ?$? |
| A. | Systems having complexities and non-linearities |
| B. | Systems having stability problems |
| C. | Systems having multiple input disturbances |
| D. | All of the above |
| Answer» E. | |
| 44. |
_ The term backlash is associated with$? |
| A. | servomotors |
| B. | induction relays |
| C. | gear trains |
| D. | any of the above |
| Answer» D. any of the above | |
| 45. |
_ Technique gives quick transient and stability response$? |
| A. | Root locus |
| B. | Bode |
| C. | Nyquist |
| D. | Nichols |
| Answer» B. Bode | |
| 46. |
_ Which of the following should be done to make an unstable system stable ?$? |
| 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 | |
| 47. |
In closed loop control system, with positive value of feedback gain the overall gain of the system will$? |
| A. | decrease |
| B. | increase |
| C. | be unaffected |
| D. | any of the above |
| Answer» B. increase | |
| 48. |
For open control system which of the following statements is incorrect ?$? |
| A. | Less expensive |
| B. | Recalibration is not required for maintaining the required quality of the output |
| C. | Construction is simple and maintenance easy |
| D. | Errors are caused by disturbances |
| Answer» C. Construction is simple and maintenance easy | |
| 49. |
The transient response, with feedback system,$? |
| A. | rises slowly |
| B. | rises quickly |
| C. | decays slowly |
| D. | decays quickly |
| Answer» E. | |
| 50. |
Which of the following is the non-linearity caused by servomotor ?$? |
| A. | Static friction |
| B. | Backlash |
| C. | Saturation |
| D. | None of the above |
| Answer» D. None of the above | |