MCQOPTIONS
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MCQOPTIONS
This section includes 166 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Feedback control system is basically |
| A. | high pass filter |
| B. | low pass filter |
| C. | band pass filter |
| D. | band stop filter |
| Answer» C. band pass filter | |
| 152. |
In control system excessive bandwidth is not employed because |
| A. | noise is proportional to bandwidth |
| B. | it leads to low relative stability |
| C. | it leads to slower time response |
| D. | noise is proportional to the square of the bandwidth |
| Answer» B. it leads to low relative stability | |
| 153. |
Which of the statements are the advantages of closed loop systems over the open loop system: |
| A. | the overall reliability of the open loop system is more than the closed loop system is more than closed loop system. |
| B. | the transient response in closed loop system decays more quickly than in open loop system. |
| C. | in open loop system closing the loop increases the gain of the system |
| D. | in open loop system the effect of parameter variation is reduced |
| Answer» C. in open loop system closing the loop increases the gain of the system | |
| 154. |
Which one of the following effect in the system is not caused by negative feedback? |
| A. | reduction in gain |
| B. | increased in bandwidth |
| C. | increase in distortion |
| D. | reduction in output impedance |
| Answer» D. reduction in output impedance | |
| 155. |
Which of the following are the not characteristics of the closed loop systems? |
| A. | it does not compensate for disturbance |
| B. | it reduces the sensitivity of plant-parameter variations |
| C. | it does not involve output measurements |
| D. | it does not has the ability to control the system transient response |
| Answer» E. | |
| 156. |
Which of the statement is correct with regard to the bandwidth of the control loop system: |
| A. | in systems where the low frequency magnitude in 0 db on the bode diagram, the bandwidth is measured at the -3 db frequency |
| B. | the bandwidth is the measurement of the accuracy of the closed loop system |
| C. | the stability is proportional to the bandwidth |
| D. | the system with larger bandwidth provides slower step response and lower fidelity ramp response |
| Answer» B. the bandwidth is the measurement of the accuracy of the closed loop system | |
| 157. |
In a temperature control system, what conversion in signal takes place? |
| A. | digital to analog |
| B. | analog to digital |
| C. | error to digital |
| D. | error to analog |
| Answer» C. error to digital | |
| 158. |
What is the effect of feedback in the overall gain of the system? |
| A. | increases |
| B. | decreases |
| C. | zero |
| D. | no change |
| Answer» C. zero | |
| 159. |
How many parameters does process control refer to? |
| A. | 1 |
| B. | 3 |
| C. | 5 |
| D. | 7 |
| Answer» D. 7 | |
| 160. |
In a thermal system, the temperature of the medium is |
| A. | increasing |
| B. | decreasing |
| C. | zero |
| D. | uniform |
| Answer» E. | |
| 161. |
On what difference does the pneumatic system works? |
| A. | speed |
| B. | pressure |
| C. | area |
| D. | length |
| Answer» C. area | |
| 162. |
The pressure inside the furnace is measured by |
| A. | gauge |
| B. | thermometer |
| C. | manometer |
| D. | barometer |
| Answer» B. thermometer | |
| 163. |
Which principle does the linear system follow? |
| A. | principle of energy conservation |
| B. | principle of mass conservation |
| C. | principle of electromagnetism |
| D. | principle of superposition |
| Answer» E. | |
| 164. |
             control systems have unpredictable & non-repeatable. |
| A. | static |
| B. | dynamic |
| C. | deterministic |
| D. | stochastic |
| Answer» E. | |
| 165. |
Feedback control systems are referred to as closed loop systems. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 166. |
What is the algebraic sum of the reference input and feedback? |
| A. | error signal |
| B. | error detector |
| C. | controlled system |
| D. | controlled output |
| Answer» B. error detector | |