MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Is the reference input minus the primary feedback.$? |
| A. | Manipulated variable |
| B. | Zero sequence |
| C. | Actuating signal |
| D. | Primary feedback |
| Answer» D. Primary feedback | |
| 2. |
an be extended to systems which are time-varying ?$? |
| A. | Bode-Nyquist stability methods |
| B. | Transfer functions |
| C. | Root locus design |
| D. | State model representatives |
| Answer» E. | |
| 3. |
Any externally introduced signal affecting the controlled output is called a$? |
| A. | feedback |
| B. | stimulus |
| C. | signal |
| D. | gain control |
| Answer» C. signal | |
| 4. |
The type-2 system has ________ at the origin.$? |
| A. | No net pole |
| B. | Net pole |
| C. | Simple pole |
| D. | Two poles |
| Answer» E. | |
| 5. |
Is an open loop control system. |
| A. | Ward Leonard control |
| B. | Field controlled D.C. motor |
| C. | Stroboscope |
| D. | Metadyne |
| Answer» C. Stroboscope | |
| 6. |
Is a part of the human temperature control system. |
| A. | Digestive system |
| B. | Perspiration system |
| C. | Ear |
| D. | Leg movement |
| Answer» C. Ear | |
| 7. |
Pressure error can be measured by which of the following ? |
| A. | Differential bellows and straingauge |
| B. | Selsyn |
| C. | Strain gauge |
| D. | Strain gauge and potentiometer |
| Answer» B. Selsyn | |
| 8. |
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 | |
| 9. |
In a system zero initial condition means that |
| A. | The system is at rest and no energy is stored in any of its components |
| B. | The system is working with zero stored energy |
| C. | The system is working with zero reference signal |
| D. | None of the above |
| Answer» B. The system is working with zero stored energy | |
| 10. |
By which of the following the system response can be tested better ? |
| A. | Ramp input signal |
| B. | Sinusoidal input signal |
| C. | Unit impulse input signal |
| D. | Exponentially decaying signal |
| Answer» D. Exponentially decaying signal | |
| 11. |
An automatic toaster is a ______ loop control system. |
| A. | open |
| B. | closed |
| C. | partially closed |
| D. | any of the above |
| Answer» B. closed | |
| 12. |
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. | none of the above |
| Answer» C. increased values of open loop gain | |
| 13. |
In a stable control system saturation can cause which of the following ? |
| A. | Low-level oscillations |
| B. | High-level oscillations |
| C. | Conditional stability |
| D. | Overdamping |
| Answer» D. Overdamping | |
| 14. |
In a system low friction coefficient facilitates |
| A. | Reduced velocity lag error |
| B. | Increased velocity lag error |
| C. | Increased speed of response |
| D. | Reduced time constant of the system |
| Answer» B. Increased velocity lag error | |
| 15. |
Which of the following statements is correct for any closed loop system ? |
| A. | All the co-efficients can have zero value |
| B. | All the co-efficients are always non-zero |
| C. | Only one of the static error co-efficients has a finite non-zero value |
| D. | None of the above |
| Answer» D. None of the above | |
| 16. |
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. | |
| 17. |
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 | |
| 18. |
In liquid level and electrical system analogy, voltage is considered analogous to |
| A. | head |
| B. | liquid flow |
| C. | liquid flow rate |
| D. | none of the above |
| Answer» B. liquid flow | |
| 19. |
In force-voltage analogy, velocity is analogous to |
| A. | current |
| B. | charge |
| C. | inductance |
| D. | capacitance |
| Answer» B. charge | |
| 20. |
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. | |
| 21. |
Mass, in force-voltage analogy, is analogous to |
| A. | charge |
| B. | current |
| C. | inductance |
| D. | resistance |
| Answer» D. resistance | |
| 22. |
The transient response of a system is mainly due to |
| A. | inertia forces |
| B. | internal forces |
| C. | stored energy |
| D. | friction |
| Answer» D. friction | |
| 23. |
In electrical pneumatic system analogy the current is considered analogous to |
| A. | velocity |
| B. | pressure |
| C. | air flow |
| D. | air flow rate |
| Answer» E. | |
| 24. |
Addition of zeros in transfer function causes which of the following? |
| A. | Lead-compensation |
| B. | Lag-compensation |
| C. | Lead-lag compensation |
| D. | None of the above |
| Answer» C. Lead-lag compensation | |
| 25. |
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 |
| E. | any of the above |
| Answer» B. stable | |
| 26. |
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 | |
| 27. |
The viscous friction co-efficient, in force-voltage analogy, is analogous to |
| A. | charge |
| B. | resistance |
| C. | reciprocal of inductance |
| D. | reciprocal of conductance |
| E. | none of the above |
| Answer» C. reciprocal of inductance | |
| 28. |
In case of type-1 system steady state acceleration is |
| A. | unity |
| B. | infinity |
| C. | zero |
| D. | 10 |
| Answer» C. zero | |
| 29. |
The temperature, under thermal and electrical system analogy, is considered analogous to |
| A. | voltage |
| B. | current |
| C. | capacitance |
| D. | charge |
| E. | none of the above |
| Answer» B. current | |
| 30. |
Hydraulic torque transmission system is analog of |
| A. | amplidyne set |
| B. | resistance-capacitance parallel circuit |
| C. | motor-generator set |
| D. | any of the above |
| Answer» D. any of the above | |
| 31. |
With feed back _____ reduces. |
| A. | system stability |
| B. | system gain |
| C. | system stability and gain |
| D. | none of the above |
| Answer» C. system stability and gain | |
| 32. |
The capacitance, in force-current analogy, is analogous to |
| A. | momentum |
| B. | velocity |
| C. | displacement |
| D. | mass |
| Answer» E. | |
| 33. |
An increase in gain, in most systems, leads to |
| A. | smaller damping ratio |
| B. | larger damping ratio |
| C. | constant damping ratio |
| D. | none of the above |
| Answer» B. larger damping ratio | |
| 34. |
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 | |
| 35. |
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 | |
| 36. |
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 | |
| 37. |
In thermal-electrical analogy charge is considered analogous to |
| A. | heat flow |
| B. | reciprocal of heat flow |
| C. | reciprocal of temperature |
| D. | temperature |
| E. | none of the above |
| Answer» E. none of the above | |
| 38. |
Static error coefficients 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. | |
| 39. |
Which of the following is an electromagnetically device ? |
| A. | Induction relay |
| B. | Thermocouple |
| C. | LVDT |
| D. | Any of the above |
| E. | None of the above |
| Answer» D. Any of the above | |
| 40. |
Which of the following is exhibited by Root locus diagrams ? |
| A. | The poles of the transfer function for a set of parameter values |
| B. | The bandwidth of the system |
| C. | The response of a system to a step input |
| D. | The frequency response of a system |
| E. | None of the above |
| Answer» B. The bandwidth of the system | |
| 41. |
technique is not applicable to nonlinear system ? |
| A. | Nyquist Criterion |
| B. | Quasi linearization |
| C. | Functional analysis |
| D. | Phase-plane representation |
| Answer» B. Quasi linearization | |
| 42. |
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) |
| E. | None of the above |
| Answer» B. Phase-lag | |
| 43. |
Phase margin of a system is used to specify which of the following ? |
| A. | Frequency response |
| B. | Absolute stability |
| C. | Relative stability |
| D. | Time response |
| Answer» D. Time response | |
| 44. |
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. | |
| 45. |
The transfer function is applicable to which of the following ? |
| A. | Linear and time-in variant systems |
| B. | Linear and time-variant systems |
| C. | Linear systems |
| D. | Non-linear systems |
| E. | None of the above |
| Answer» B. Linear and time-variant systems | |
| 46. |
Which of the following devices is used for conversion of co-ordinates ? |
| A. | Microsyn |
| B. | Selsyn |
| C. | Synchro-resolver |
| D. | Synchro-transformer |
| Answer» D. Synchro-transformer | |
| 47. |
An amplidyne can give which of the following characteristics ? |
| A. | Constant current |
| B. | Constant voltage |
| C. | Constant current as well as constant voltage |
| D. | Constant current, constant voltage and constant power |
| E. | None of the above |
| Answer» E. None of the above | |
| 48. |
In a stable control system backlash can cause which of the following ? |
| A. | Underdamping |
| B. | Overdamping |
| C. | Poor stability at reduced values of open loop gain |
| D. | Low-level oscillations |
| Answer» E. | |
| 49. |
From which of the following transfer function can be obtained ? |
| A. | Signal flow graph |
| B. | Analogous table |
| C. | Output-input ratio |
| D. | Standard block system |
| E. | None of the above |
| Answer» B. Analogous table | |
| 50. |
has tendency to oscillate. |
| A. | Open loop system |
| B. | Closed loop system |
| C. | Both (A) and (B) |
| D. | Neither (A) nor (B) |
| Answer» C. Both (A) and (B) | |