MCQOPTIONS
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MCQOPTIONS
This section includes 11 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. |
What is the characteristic of a good control system? |
| A. | Sensitive to parameter variation |
| B. | Insensitive to the input command |
| C. | Neither sensitive to parameter variations not sensitive to input commands |
| D. | Insensitive to the parameter variation but sensitive to the input commands |
| Answer» E. | |
| 2. |
The input to a controller is : |
| A. | Sensed signal |
| B. | Error signal |
| C. | Desired variable value |
| D. | Signal of fixed amplitude not dependent on desired value |
| Answer» C. Desired variable value | |
| 3. |
Consider the following statements for a PI compensator for control system.1. It is equivalent to adding a zero at origin2. It reduces overshoot3. It improves the steady state error of the systemWhich of the statements given above are correct? |
| A. | 1 and 3 |
| B. | 1,2 and 3 only |
| C. | 2 and 3 |
| D. | 1 only |
| Answer» D. 1 only | |
| 4. |
Which one of the following statements is correct?The effects of the phase lead compensator or gain cross over frequency and the bandwidth are: |
| A. | That both are decreased |
| B. | That gain cross over frequency reduces but BW is increased |
| C. | That gain cross over frequency increases but BW is decreased |
| D. | That both are increased |
| Answer» E. | |
| 5. |
THE_INPUT_TO_A_CONTROLLER_IS_:?$ |
| A. | Sensed signal |
| B. | Error signal |
| C. | Desired variable value |
| D. | Signal of fixed amplitude not dependent on desired value |
| Answer» C. Desired variable value | |
| 6. |
A process is controlled by PID controller. The sensor has high, measurement noise. How can the effect be reduced? |
| A. | By use of bandwidth limited derivative term |
| B. | By use of proportional and derivative terms in the forward path |
| C. | By use of high proportional band |
| D. | By use of low integral gain |
| Answer» C. By use of high proportional band | |
| 7. |
Which one of the following is a disadvantage of proportional controller? |
| A. | It is destabilizes the system |
| B. | It produces offset |
| C. | It makes the response faster |
| D. | It has very simple implementation |
| Answer» C. It makes the response faster | |
| 8. |
Which one of the following is an advantage of a PD controller in terms of damping and natural frequency? |
| A. | G remains fixed but natural frequency increases |
| B. | G remains fixed but natural frequency decreases |
| C. | Natural frequency fixed but G increases |
| D. | Natural frequency fixed but G decreases |
| Answer» D. Natural frequency fixed but G decreases | |
| 9. |
What is the effect of phase-lag compensation on the performance of the servo system? |
| A. | For a given relative stability, the velocity constant is increased |
| B. | For a given relative stability, the velocity constant is decreased |
| C. | The bandwidth of the system is increased |
| D. | The time response is made faster |
| Answer» B. For a given relative stability, the velocity constant is decreased | |
| 10. |
With regard to the filtering property, the lead compensator and the lag compensator are respectively : |
| A. | Low pass and high pass filters |
| B. | High pass and low pass filters |
| C. | Both high pass filter |
| D. | Both low pass filters |
| Answer» C. Both high pass filter | |
| 11. |
How does cascading an integral controller in the forward path of a control system affect the relative stability (RS) and the steady-state error of that system? |
| A. | RS and SSE are increased |
| B. | RS is reduced nut SSE is increased |
| C. | RS is increased but SSE is reduced |
| D. | RS and SSE are reduced |
| Answer» E. | |