MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 81 Mcqs, each offering curated multiple-choice questions to sharpen your Control Systems knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
" In liquid level and electrical system analogy, voltage is considered analogous to :" |
| A. | " Head" |
| B. | " Liquid flow" |
| C. | " Liquid flow rate" |
| D. | " Air flow rate" |
| Answer» B. " Liquid flow" | |
| 52. |
" In optimum time switching curve the system takes :" |
| A. | " Minimum time in reaching desired location" |
| B. | " Maximum time in reaching desired location" |
| C. | " Never reaches" |
| D. | " No desired location is present" |
| Answer» B. " Maximum time in reaching desired location" | |
| 53. |
" A unity feedback system with open-loop transfer function G (s) = 4/[s(s+p)] is critically damped. The value of the parameter p is" |
| A. | " 4" |
| B. | " 3" |
| C. | " 2" |
| D. | " 1" |
| Answer» B. " 3" | |
| 54. |
" An increase in gain, in most systems, leads to:" |
| A. | " Smaller damping ratio" |
| B. | " Larger damping ratio" |
| C. | " Constant damping ratio" |
| D. | " Zero damping ratio" |
| Answer» B. " Larger damping ratio" | |
| 55. |
" The transient response of a system is mainly due to:" |
| A. | " Inertia forces" |
| B. | " Internal forces" |
| C. | " Stored energy" |
| D. | " Friction" |
| Answer» D. " Friction" | |
| 56. |
" With feedback _____ reduces." |
| A. | " System stability" |
| B. | " System gain" |
| C. | " System stability and gain" |
| D. | " Damping" |
| Answer» C. " System stability and gain" | |
| 57. |
" System with logic switching are :" |
| A. | " Hang on" |
| B. | " Bang on" |
| C. | " Bang-bang" |
| D. | " Hang out" |
| Answer» D. " Hang out" | |
| 58. |
" Spring constant in force-voltage analogy is analogous to?" |
| A. | " Capacitance" |
| B. | " Reciprocal of capacitance" |
| C. | " Current" |
| D. | " Resistance" |
| Answer» C. " Current" | |
| 59. |
" 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" | |
| 60. |
" ___________ signal will become zero when the feedback signal and reference signs are equal." |
| A. | " Input" |
| B. | " Actuating" |
| C. | " Feedback" |
| D. | " Reference" |
| Answer» C. " Feedback" | |
| 61. |
" 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" | |
| 62. |
" A linear time invariant system is stable if :" |
| A. | " System in excited by the bounded input, the output is also bounded" |
| B. | " In the absence of input output tends zero" |
| C. | " Both a and b" |
| D. | " None of the mentioned" |
| Answer» D. " None of the mentioned" | |
| 63. |
" 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" |
| Answer» B. " The bandwidth of the system" | |
| 64. |
" Electrical time-constant of an armature-controlled dc servomotor is :" |
| A. | " Equal to mechanical time-constant" |
| B. | " Smaller than mechanical time-constant" |
| C. | " Larger than mechanical time-constant" |
| D. | " Not related to mechanical time-constant" |
| Answer» C. " Larger than mechanical time-constant" | |
| 65. |
" In a control system integral error compensation _______steady state error" |
| A. | " Increases" |
| B. | " Minimizes" |
| C. | " Does not have any effect on steady state error" |
| D. | " All of the mentioned" |
| Answer» C. " Does not have any effect on steady state error" | |
| 66. |
" 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" | |
| 67. |
" A.C. servomotor is basically a" |
| A. | " Universal motor" |
| B. | " Single phase induction motor" |
| C. | " Two phase induction motor" |
| D. | " Three phase induction motor" |
| Answer» D. " Three phase induction motor" | |
| 68. |
" The first order control system, which is well designed, has a" |
| A. | " Small bandwidth" |
| B. | " Negative time constant" |
| C. | " Large negative transfer function pole" |
| D. | " None of the mentioned" |
| Answer» D. " None of the mentioned" | |
| 69. |
" Which of the following cannot be measured by LVDT?" |
| A. | " Displacement" |
| B. | " Velocity" |
| C. | " Acceleration" |
| D. | " Pressure" |
| Answer» E. | |
| 70. |
Consider the following statements:1. The effect of feedback is to reduce the system error2. Feedback increases the gain of the system in one frequency range but decreases in another.3. Feedback can cause a system that is originally stable to become unstableWhich of these statements are correct. |
| A. | 1,2 and 3 |
| B. | 1 and 2 |
| C. | 2 and 3 |
| D. | 1 and 3 |
| Answer» D. 1 and 3 | |
| 71. |
" Stability of a system implies that :" |
| A. | " Small changes in the system input does not result in large change in system output" |
| B. | " Small changes in the system parameters does not result in large change in system output" |
| C. | " Small changes in the initial conditions does not result in large change in system output" |
| D. | " Small changes in the initial conditions result in large change in system output" |
| Answer» B. " Small changes in the system parameters does not result in large change in system output" | |
| 72. |
" Roots with higher multiplicity on the imaginary axis makes the system :" |
| A. | " Absolutely stable" |
| B. | " Unstable" |
| C. | " Linear" |
| D. | " None of the mentioned" |
| Answer» C. " Linear" | |
| 73. |
" Hydraulic torque transmission system is analog of :" |
| A. | " Amplidyne set" |
| B. | " Resistance-capacitance parallel circuit" |
| C. | " Motor-generator set" |
| D. | " Any of the mentioned" |
| Answer» D. " Any of the mentioned" | |
| 74. |
" 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. | " Laplace transform is not possible" |
| Answer» B. " The system is working with zero stored energy" | |
| 75. |
The polar plot of a transfer function passes through the critical point (-1,0).Gain margin is |
| A. | zero |
| B. | -1dB |
| C. | 1dB |
| D. | Infinity |
| Answer» B. -1dB | |
| 76. |
" 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. | |
| 77. |
" If the impulse response in absolutely integrable then the system is :" |
| A. | " Absolutely stable" |
| B. | " Unstable" |
| C. | " Linear" |
| D. | " None of the mentioned" |
| Answer» B. " Unstable" | |
| 78. |
" 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" | |
| 79. |
" The open-loop transfer function of a unity feedback system is K/(s^2 (s+5))The system is unstable for" |
| A. | " K>5" |
| B. | " K<5" |
| C. | " K>0" |
| D. | " All of the mentioned" |
| Answer» E. | |
| 80. |
The root locus diagram has loop transfer function G(s)H(s) = K/ s(s+4)(s2+4s+5) has |
| A. | No breakaway points |
| B. | Three real breakaway points |
| C. | Only one breakaway points |
| D. | One real and two complex breakaway points |
| Answer» C. Only one breakaway points | |
| 81. |
" For non-linear systems stability cannot be determined due to:" |
| A. | " Possible existence of multiple equilibrium states" |
| B. | " No correspondence between bounded input and bounded output stability and asymptotic stability" |
| C. | " Output may be bounded for the particular bounded input but may not be bounded for the bounded inputs" |
| D. | " All of the mentioned" |
| Answer» E. | |