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control systems MCQs

Practise focused control systems questions with marked answers for exam preparation and subject revision.

control systems Mcqs
1. A car is raining at a constant speed of 50 km/h, which of the following is the feedback element for the driver ?
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A. Eyes

B. Clutch

C. None of the above

D. Steering wheel

E. Needle of the speedometer
2. The capacitance, in force-current analogy, is analogous to_____________?
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A. displacement

B. momentum

C. velocity

D. mass
3. Spring constant in force-voltage analogy is analogous to_____________?
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A. current

B. reciprocal of capacitance

C. resistance

D. capacitance

4. increases the steady state accuracy?
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A. Integrator

B. Phase lead compensator

C. Phase lag compensator

D. Differentiator

5. ______________By which of the following the system response can be tested better ?
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A. Sinusoidal input signal

B. Unit impulse input signal

C. Exponentially decaying signal

D. Ramp input signal

6. Which of the following is an electromagnetically device ?
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A. LVDT

B. Induction relay

C. Thermocouple

D. None of the above

E. Any of the above

7. A controller, essentially, is a________________?
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A. clipper

B. amplifier

C. comparator

D. sensor

8. Which of the following should be done to make an unstable system stable ?
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A. The gain of the system should be decreased

B. The number of zeros to the loop transfer function should be increased

C. The number of poles to the loop transfer function should be increased

D. The gain of the system should be increased
9. Which of the following can be measured by LVDT ?
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A. Displacement

B. Acceleration

C. Any of the above

D. Velocity

10. An automatic toaster is a ___________ loop control system?
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A. open

B. closed

C. partially closed

D. any of the above

11. If the gain of the critical damped system is increased it will behave as______________?
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A. underdamped

B. oscillatory

C. critically damped

D. none of the above

E. overdamped

12. Which of the following is an open loop control system ?
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A. Field controlled D.C. motor

B. Ward leonard control

C. Stroboscope

D. Metadyne

13. The first order control system, which is well designed, has a_______________?
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A. small bandwidth

B. none of the above

C. negative time constant

D. large negative transfer function pole
14. Due to which of the following reasons excessive bond width in control systems should be avoided ?
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A. Noise is proportional to band width

B. None of the above

C. It leads to low relative stability

D. It leads to slow speed of response

15. A good control system has all the following features except_____________?
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A. sufficient power handling capacity

B. good stability

C. slow response

D. good accuracy

16. In open loop system_____________?
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A. the control action is independent of the output

B. the control action depends on system variables

C. the control action depends on the size of the system

D. the control action depends on the input signal

17. With feedback __________ increases?
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A. gain

B. effects of disturbing signals

C. sensitivity

D. system stability
18. ___________From which of the following transfer function can be obtained ?
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A. Output-input ratio

B. Signal flow graph

C. Standard block system

D. Analogous table

E. None of the above

19. The viscous friction co-efficient, in force-voltage analogy, is analogous to______________?
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A. charge

B. reciprocal of inductance

C. resistance

D. none of the above

E. reciprocal of conductance

20. has tendency to oscillate______________?
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A. Open loop system

B. Closed loop system

C. Both A. and B.

D. Neither A. nor B.