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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.
| 1. |
Nichol’s chart: |
| A. | constant gain and constant phase shift loci of the closed-loop system. |
| B. | plot of loop gain with the variation in frequency |
| C. | circles of constant gain for the closed loop transfer function |
| D. | circles of constant phase shift for the closed loop transfer function |
| Answer» C. circles of constant gain for the closed loop transfer function | |
| 2. |
Find the velocity error constant of the system given below : |
| A. | 0 |
| B. | 2 |
| C. | 4 |
| D. | ∞ |
| Answer» D. ∞ | |
| 3. |
If the damping ratio is equal to 1, a second-order system is |
| A. | having maginary roots of the characteristic equation |
| B. | underdamped |
| C. | critically damped with unequal roots |
| D. | critically damped with equal roots |
| Answer» E. | |
| 4. |
This makes the system underdamped since the response of the system becomes a decaying sinusoid in nature. |
| A. | 9/(s2+2s+9) |
| B. | 16/(s2+2s+16) |
| C. | 25/(s2+2s+25) |
| D. | 36/(s2+2s+36) |
| Answer» E. | |
| 5. |
From the following graphs of the generalized transfer function 1/as2, which plot shows the transfer function for a higher a? |
| A. | blue |
| B. | red |
| C. | yellow |
| D. | purple |
| Answer» E. | |
| 6. |
Use mason’s gain formula to find the transfer function of the given signal flow graph: |
| A. | abd/1-(ac) |
| B. | abdeg/1-(bc+ef)+bcef |
| C. | abd/1-(bc+ef)+bcef |
| D. | adcdef/1-(bc+ef)+bcef |
| Answer» C. abd/1-(bc+ef)+bcef | |
| 7. |
With feedback reduces. |
| A. | system stability |
| B. | system gain |
| C. | system stability and gain |
| D. | none of the mentioned |
| Answer» C. system stability and gain | |
| 8. |
Use mason’s gain formula to find the transfer function of the following signal flow graph: |
| A. | abcd+efg/1-cd-fg-cdfg |
| B. | acdfg+bcefg/1-cd-fg-cdfg |
| C. | abef+bcd/1-cd-fg-cdfg |
| D. | adcdefg/1-cd-fg-cdfg |
| Answer» C. abef+bcd/1-cd-fg-cdfg | |
| 9. |
If the initial conditions for a system are inherently zero, what does it physically mean? |
| A. | the system is at rest but stores energy |
| B. | the system is working but does not store energy |
| C. | the system is at rest or no energy is stored in any of its part |
| D. | the system is working with zero reference input |
| Answer» D. the system is working with zero reference input | |
| 10. |
The disadvantages of the error constants are: |
| A. | they do not give the information of the steady state error when the inputs are other than the three basic types |
| B. | error constant fail to indicate the exact manner in which the error function change with time. |
| C. | they do not give information of the steady state error and fail to indicate the exact manner in which the error function change with time |
| D. | they give information of the steady state error |
| Answer» D. they give information of the steady state error | |
| 11. |
Open loop system is stable than closed loop system |
| A. | more |
| B. | less |
| C. | inclined |
| D. | exponential |
| Answer» B. less | |
| 12. |
Which one of the following applications software’s is used to obtain an accurate root locus for? |
| A. | lisp |
| B. | matlab |
| C. | dbase |
| D. | oracle |
| Answer» C. dbase | |
| 13. |
Let c(t) be the unit step response of a system with transfer function K(s+a)/(s+K). If c(0+) = 2 and c(∞) = 10, then the values of a and K are respectively. |
| A. | 2 and 10 |
| B. | -2 and 10 |
| C. | 10 and 2 |
| D. | 2 and -10 |
| Answer» D. 2 and -10 | |
| 14. |
The transient response, yt(t), of a system becomes as t tends to infinity. |
| A. | 0 |
| B. | 1 |
| C. | infinity |
| D. | undefined |
| Answer» B. 1 | |
| 15. |
In a control system integral error compensation steady state error |
| A. | increases |
| B. | minimizes |
| C. | does not have any effect on |
| D. | all of the mentioned |
| Answer» C. does not have any effect on | |
| 16. |
Conventional control theory is applicable to systems |
| A. | siso |
| B. | mimo |
| C. | time varying |
| D. | non-linear |
| Answer» B. mimo | |
| 17. |
Consider the system represented by the equation given below. What would be the total phase value at ω = 0? |
| A. | -90° |
| B. | -180° |
| C. | -270° |
| D. | -360° |
| Answer» D. -360° | |
| 18. |
Use mason’s gain formula to find the transfer function of the given figure: |
| A. | g1+g2 |
| B. | g1+g1/1-g1h+g2h c) g1+g2/1+g1h+g2h |
| C. | g1-g2 |
| Answer» D. | |
| 19. |
If the damping factor is zero, the unit-step response is |
| A. | purely sinusoidal |
| B. | ramp function |
| C. | pulse function |
| D. | impulse function |
| Answer» B. ramp function | |
| 20. |
Steady state refers to |
| A. | error at the steady state |
| B. | error at the transient state |
| C. | error at both state |
| D. | precision |
| Answer» B. error at the transient state | |
| 21. |
is a quantitative measure of how fast the transients die out in the system. |
| A. | absolutely stable |
| B. | conditionally stable |
| C. | unstable |
| D. | relative stability |
| Answer» E. | |
| 22. |
If the damping factor is less than the damping factor at critical damping, the time response of the system is |
| A. | underdamped |
| B. | overdamped |
| C. | marginally damped |
| D. | unstable |
| Answer» B. overdamped | |
| 23. |
Use mason’s gain formula to calculate the transfer function of given figure: |
| A. | g1/1+g2h |
| B. | g1+g2/1+g1h |
| C. | g2/1+g1h |
| D. | none of the mentioned |
| Answer» C. g2/1+g1h | |
| 24. |
A system is said to be if every state can be completely identified by measurements of the outputs at the finite time interval. |
| A. | controllable |
| B. | observable |
| C. | cannot be determined |
| D. | controllable and observable |
| Answer» C. cannot be determined | |
| 25. |
Nichol’s chart is useful for the detailed study and analysis of: |
| A. | closed loop frequency response |
| B. | open loop frequency response |
| C. | close loop and open loop frequency responses |
| D. | open loop and close loop frequency responses |
| Answer» B. open loop frequency response | |
| 26. |
The step response of the system is c(t) = 10+8e-t-4/8e-2t . The gain in time constant form of transfer function will be: |
| A. | -7 |
| Answer» E. | |
| 27. |
Which one of the following statements is correct? Nichol’s chart is useful for the detailed study analysis of: |
| A. | closed loop frequency response |
| B. | open loop frequency response |
| C. | close loop and open loop frequency responses |
| D. | none of the above |
| Answer» B. open loop frequency response | |
| 28. |
From the following graphs of the generalized transfer function 1/s+a, which plot shows a transfer function with a bigger value of a? |
| A. | blue plot |
| B. | red plot |
| C. | yellow plot |
| D. | purple plot |
| Answer» E. | |
| 29. |
A system is said to be if it is possible to transfer the system state from any initial state to any desired state in finite interval of time. |
| A. | controllable |
| B. | observable |
| C. | cannot be determined |
| D. | controllable and observable |
| Answer» B. observable | |
| 30. |
control systems have unpredictable & non-repeatable. |
| A. | static |
| B. | dynamic |
| C. | deterministic |
| D. | stochastic |
| Answer» E. | |
| 31. |
For two-phase AC servomotor, if the rotor’s resistance and reactance are respectively R and X, its length and diameter are respectively L and D then, |
| A. | x/r and l/d are both small |
| B. | x/r is large but l/d is small |
| C. | x/r is small but l/d is large |
| D. | x/r and l/d are both large |
| Answer» D. x/r and l/d are both large | |
| 32. |
Loop which do not possess any common node are said to be loops. |
| A. | forward gain |
| B. | touching loops |
| C. | non touching loops |
| D. | feedback gain |
| Answer» D. feedback gain | |
| 33. |
A transfer function has two zeroes at infinity. Then the relation between the numerator(N) and the denominator degree(M) of the transfer function is: |
| A. | n=m+2 |
| B. | n=m-2 |
| C. | n=m+1 |
| D. | n=m-1 |
| Answer» C. n=m+1 | |
| 34. |
Conventional control theory is applicable to              systems |
| A. | siso |
| B. | mimo |
| C. | time varying |
| D. | non-linear |
| Answer» B. mimo | |
| 35. |
State space analysis is applicable even if the initial conditions are |
| A. | zero |
| B. | non-zero |
| C. | equal |
| D. | not equal |
| Answer» C. equal | |
| 36. |
State model representation is possible using |
| A. | physical variables |
| B. | phase variables |
| C. | canonical state variables |
| D. | all of the mentioned |
| Answer» E. | |
| 37. |
According to the property of state transition method, e0 is equal to |
| A. | i |
| B. | a |
| C. | e-at |
| D. | -eat |
| Answer» D. -eat | |
| 38. |
Real distinct and negative. |
| A. | center |
| B. | focus point |
| C. | saddle point |
| D. | stable node |
| Answer» E. | |
| 39. |
Real and equal but with opposite sign. |
| A. | center |
| B. | focus point |
| C. | saddle point |
| D. | stable node |
| Answer» D. stable node | |
| 40. |
Pure imaginary pair: |
| A. | centre |
| B. | focus point |
| C. | saddle point |
| D. | stable node |
| Answer» B. focus point | |
| 41. |
Complex conjugate pair: |
| A. | center |
| B. | focus point |
| C. | saddle point |
| D. | stable node |
| Answer» C. saddle point | |
| 42. |
A system is said to be                                   if every state can be completely identified by measurements of the outputs at the finite time interval. |
| A. | controllable |
| B. | observable |
| C. | cannot be determined |
| D. | controllable and observable |
| Answer» C. cannot be determined | |
| 43. |
A system is said to be                           if it is possible to transfer the system state from any initial state to any desired state in finite interval of time. |
| A. | controllable |
| B. | observable |
| C. | cannot be determined |
| D. | controllable and observable |
| Answer» B. observable | |
| 44. |
Which of the following is the output of a thermocouple? |
| A. | alternating current |
| B. | direct current |
| C. | a.c. voltage |
| D. | d.c. voltage |
| Answer» E. | |
| 45. |
The transfer function technique is considered as inadequate under which of the following conditions? |
| A. | systems having complexities and non- linearity’s |
| B. | systems having stability problems |
| C. | systems having multiple input disturbances |
| D. | all of the mentioned |
| Answer» E. | |
| 46. |
                        directly converts temperature into voltage. |
| A. | thermocouple |
| B. | potentiometer |
| C. | gear train |
| D. | lvdt |
| Answer» B. potentiometer | |
| 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 |
| Answer» E. | |
| 48. |
With feedback            reduces. |
| A. | system stability |
| B. | system gain |
| C. | system stability and gain |
| D. | none of the mentioned |
| Answer» C. system stability and gain | |
| 49. |
Which of the following can be measured by LVDT? |
| A. | displacement |
| B. | velocity |
| C. | acceleration |
| D. | all of the mentioned |
| Answer» E. | |
| 50. |
In a control system integral error compensation                steady state error |
| A. | increases |
| B. | minimizes |
| C. | does not have any effect on |
| D. | all of the mentioned |
| Answer» C. does not have any effect on | |