MCQOPTIONS
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MCQOPTIONS
This section includes 85 Mcqs, each offering curated multiple-choice questions to sharpen your Bachelor of Computer Applications (BCA) knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
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 |
| Answer» E. | |
| 2. |
In a control system integral error compensation _______ steady state error |
| A. | increases |
| B. | minimizes |
| C. | does not have any effect on |
| D. | any of the above |
| Answer» C. does not have any effect on | |
| 3. |
A differentiator is usually not a part of a control system because it |
| A. | reduces damping |
| B. | reduces the gain margin |
| C. | increases input noise |
| D. | increases error |
| Answer» D. increases error | |
| 4. |
Which of the following is an electromagnetically device ? |
| A. | induction relay |
| B. | thermocouple |
| C. | lvdt |
| D. | any of the above |
| Answer» D. any of the above | |
| 5. |
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. | |
| 6. |
can 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. | |
| 7. |
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 | |
| 8. |
A phase lag lead network introduces in the output |
| A. | lag at all frequencies |
| B. | lag at high frequencies and lead at low frequencies |
| C. | lag at low frequencies and lead at high frequencies |
| D. | none of the above |
| Answer» D. none of the above | |
| 9. |
technique gives quick transient and stability response |
| A. | root locus |
| B. | bode |
| C. | nyquist |
| D. | nichols |
| Answer» B. bode | |
| 10. |
The effect of error damping is to |
| A. | provide larger settling lime |
| B. | delay the response |
| C. | reduce steady state error |
| D. | any of the above |
| Answer» D. any of the above | |
| 11. |
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 | |
| 12. |
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 | |
| 13. |
In pneumatic control systems the control valve used as final control element converts |
| A. | pressure signal to electric signal |
| B. | pressure signal to position change |
| C. | electric signal to pressure signal |
| D. | position change to pressure signal |
| Answer» C. electric signal to pressure signal | |
| 14. |
Which of the following is the definition of proportional band of a controller ? |
| A. | the range of air output as measured variable varies from maximum to minimum |
| B. | the range of measured variables from set value |
| C. | the range of measured variables through which the air output changes from maximum to minimum |
| D. | any of the above |
| Answer» D. any of the above | |
| 15. |
is not a final control element. |
| A. | control valve |
| B. | potentiometer |
| C. | electropneumatic converter |
| D. | servomotor |
| Answer» C. electropneumatic converter | |
| 16. |
Which of the following can be measured by the use of a tachogenerator ? |
| A. | acceleration |
| B. | speed |
| C. | speed and acceleration |
| D. | displacement |
| Answer» C. speed and acceleration | |
| 17. |
The phase lag produced by transportation relays |
| A. | is independent of frequency |
| B. | is inverseh’proportional to frequency |
| C. | increases linearly with frequency |
| D. | decreases linearly with frequency |
| Answer» D. decreases linearly with frequency | |
| 18. |
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 | |
| 19. |
technique is not applicable to nonlinear system ? |
| A. | nyquist criterion |
| B. | quasi linearization |
| C. | functional analysis |
| D. | phase-plane representation |
| Answer» B. quasi linearization | |
| 20. |
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 | |
| 21. |
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 | |
| 22. |
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 | |
| 23. |
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 | |
| 24. |
In case of type-1 system steady state acceleration is |
| A. | unity |
| B. | infinity |
| C. | zero |
| D. | 10 |
| Answer» C. zero | |
| 25. |
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 | |
| 26. |
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 | |
| 27. |
The type 2 system has ______ at the origin. |
| A. | no net pole |
| B. | net pole |
| C. | simple pole |
| D. | two poles |
| Answer» E. | |
| 28. |
The type 1 system has ______ at the origin. |
| A. | no pole |
| B. | net pole |
| C. | simple pole |
| D. | two poles |
| Answer» D. two poles | |
| 29. |
The type 0 system has ______ at the origin. |
| A. | no pole |
| B. | net pole |
| C. | simple pole |
| D. | two poles |
| Answer» B. net pole | |
| 30. |
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 | |
| 31. |
specified ________ input signal. |
| A. | acceleration |
| B. | velocity |
| C. | position |
| D. | all of the above |
| Answer» E. | |
| 32. |
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 | |
| 33. |
The frequency and time domain are related through which of the following? |
| A. | laplace transform and fourier integral |
| B. | laplace transform |
| C. | fourier integral |
| D. | either (b) or (c) |
| Answer» B. laplace transform | |
| 34. |
Spring constant in force-voltage analogy is analogous to |
| A. | capacitance |
| B. | reciprocal of capacitance |
| C. | current |
| D. | resistance |
| Answer» C. current | |
| 35. |
In a system low friction co-efficient 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 | |
| 36. |
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 | |
| 37. |
With feedback _____ increases. |
| A. | system stability |
| B. | sensitivity |
| C. | gain |
| D. | effects of disturbing signals |
| Answer» B. sensitivity | |
| 38. |
is the reference input minus the primary feedback. |
| A. | manipulated variable |
| B. | zero sequence |
| C. | actuating signal |
| D. | primary feedback |
| Answer» D. primary feedback | |
| 39. |
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 |
| Answer» B. analogous table | |
| 40. |
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 |
| Answer» B. linear and time-variant systems | |
| 41. |
as |
| A. | disturbance |
| B. | command |
| C. | control element |
| D. | reference input |
| Answer» B. command | |
| 42. |
The transient response of a system is mainly due to |
| A. | inertia forces |
| B. | internal forces |
| C. | stored energy |
| D. | friction |
| Answer» D. friction | |
| 43. |
signal will become zero when the feedback signal and reference signs are equal. |
| A. | input |
| B. | actuating |
| C. | feedback |
| D. | reference |
| Answer» C. feedback | |
| 44. |
Mass, in force-voltage analogy, is analogous to |
| A. | charge |
| B. | current |
| C. | inductance |
| D. | resistance |
| Answer» D. resistance | |
| 45. |
In thermal-electrical analogy charge is considered analogous to |
| A. | heat flow |
| B. | reciprocal of heat flow |
| C. | reciprocal of temperature |
| D. | temperature |
| Answer» E. | |
| 46. |
In force-voltage analogy, velocity is analogous to |
| A. | current |
| B. | charge |
| C. | inductance |
| D. | capacitance |
| Answer» B. charge | |
| 47. |
The viscous friction co-efficient, in force-voltage analogy, is analogous to |
| A. | charge |
| B. | resistance |
| C. | reciprocal of inductance |
| D. | reciprocal of conductance |
| Answer» C. reciprocal of inductance | |
| 48. |
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 | |
| 49. |
In electrical-pneumatic system analogy the current is considered analogous to |
| A. | velocity |
| B. | pressure |
| C. | air flow |
| D. | air flow rate |
| Answer» E. | |
| 50. |
The temperature, under thermal and electrical system analogy, is considered analogous to |
| A. | voltage |
| B. | current |
| C. | capacitance |
| D. | charge |
| Answer» B. current | |