MCQOPTIONS
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MCQOPTIONS
This section includes 17 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. |
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 | |
| 2. |
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 | |
| 3. |
A car is running at a constant speed of 50 km/h, which of the following is the feedback element for the driver ? |
| A. | Clutch |
| B. | Eyes |
| C. | Needle of the speedometer |
| D. | Steering wheel |
| Answer» D. Steering wheel | |
| 4. |
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. | |
| 5. |
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» B. Overall gain | |
| 6. |
When the initial conditions of a system are specified to be zero it implies that the system is |
| A. | at rest without any energy stored in it |
| B. | working normally with reference input |
| C. | working normally with zero reference input |
| D. | at rest but stores energy |
| Answer» E. | |
| 7. |
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 dis turbances |
| D. | All of the above |
| Answer» E. | |
| 8. |
Due to which of the following reasons excessive bond width in control systems should be avoided ? |
| A. | It leads to slow speed of response |
| B. | It leads to low relative stability |
| C. | Noise is proportional to band width |
| D. | None of the above |
| Answer» D. None of the above | |
| 9. |
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 | |
| 10. |
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 above |
| Answer» B. Bode plot | |
| 11. |
On which of the following factors does the sensitivity of a closed loop system to gain changes and load disturbances depend ? |
| A. | Frequency |
| B. | Loop gain |
| C. | Forward gain |
| D. | All of the above |
| Answer» E. | |
| 12. |
Static error co-efficients are used as a measure of the effectiveness of closed loop systems for specified ________ input signal. |
| A. | acceleration |
| B. | velocity |
| C. | position |
| D. | all of the above |
| Answer» E. | |
| 13. |
Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero ? |
| A. | The system is relatively stable |
| B. | The system is highly stable |
| C. | The system is highly oscillatory |
| D. | None of the above |
| Answer» D. None of the above | |
| 14. |
The temperature, under thermal and electrical system analogy, is considered analogous to |
| A. | voltage |
| B. | current |
| C. | capacitance |
| D. | charge |
| Answer» B. current | |
| 15. |
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 | |
| 16. |
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 | |
| 17. |
In order to increase the damping of a badly underdamped system which of following compensators may be used ? |
| A. | Phase-lead |
| B. | Phase-lag |
| C. | Both (a) and (b) |
| D. | Either (a) and (b) |
| Answer» B. Phase-lag | |