1000+ Control System Quiz, Top MCQ On Control System

Hello guys, welcome back to our blog. In this article, I will share a control system quiz so that you can test your knowledge, I will some commonly asked MCQs on the control system, etc.

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Control System Quiz

1) ________ is known as automatic control system. 

• a) Open loop control system 
• b) Closed loop control system 
• c) Either 1 or 2 
• d) Nether 1 nor 2 

Answer

2) Advantages of the open-loop control system is/are,

• a) simple and economical
• b) accurate
• c) reliable
• d) all of the above

Answer

3) Why signal flow graph is used? 

• a) To find the stability of the system 
• b) To find the transfer function of a system 
• c) To find poles of the system 
• d) All of the above 

Answer

4) Which is the Electrical analogous quantity for spring element (K) in force voltage analogy? 

• a) L 
• b) R 
• c) 1/C 
• d) C 

Answer

5) The input of the system is depending upon the output quantity, then the  system is a 

• a) open-loop control system
• b) closed-loop control system
• c) either 1 or 2
• d) none of the above

Answer

6) Assume two blocks having gains P and Q, and connected in series with each other, what is the resultant gain using the block diagram reduction method? 

• a) P+Q 
• b) P*Q 
• c) P-Q 
• d) P/Q 

Answer

7) In signal flow graph input node is node having only________ branches.

• a) incoming
• b) outgoing  
• c) both 1 and 2
• d) none of the above

Answer

8) Which of the following are the characteristics of a negative feedback control system? 

• a) Low sensitivity to parameter variations 
• b) Rejection of disturbance signals 
• c) (a) & (b) both 
• d) None of above 

Answer

9) Which of the following is/are the example of an actuator?

• a) Pneumatic motor 
• b) Hydraulic motor 
• c) All 
• d) Electric motor 

Answer

10) Transient state analysis deals with_____. 

• a) Magnitude of error 
• b) Nature of response 
• c) Both 1 and 2 
• d) None of the above 

Answer

11) The steady-state error for ramp input for a type two system is  equal to  

• a) zero
• b) infinite
• c) non-zero number
• d) constant

Answer

12) Differentiation of parabolic response is a ___________response.

• a) parabolic 
• b) ramp 
• c) step 
• d) Impulse 

Answer

13) Lead compensator is used to improve 

• a) Transient response 
• b) Steady-state response 
• c) Both 1 and 2 
• d) None of the above 

Answer

14) Find the Laplace transform for sin(ωt)? 

• a) 1/s 
• b) 1/s²
• c) s/(s²+ω²) 
• d) ω/(s²+ω²) 

Answer

15) For a type 1 system with parabolic input, the steady-state error is

• a) zero
• b) finite constant
• c) infinite
• d) indeterminate

Answer

16) Time taken for the response to rise from zero to 100 % for the very  first time is called 

• a) Rise time
• b) Settling time
• c) Delay time
• d) Peak time

Answer

17) Lead network is used to 

• a) improve transient response
• b) both A and C
• c) increase bandwidth 
• d) improve steady-state response 

Answer

18) A system is stable for (where GM = Gain Margin and PM = Phase  Margin) 

• a) GM and PM both +ve 
• b) GM and PM both -ve 
• c) GM -ve 
• d) PM – ve

Answer

19) In a control system, an integrator is represented by

• a) s
• b) s2
• c) 1 / s2
• d) 1 / s

Answer

20) A function of one or more variables that provides information  about the nature of a physical event is called 

• a) signal
• b) interference
• c) system
• d) noise

Answer

21) A system of constant voltage and constant frequency is called  _______ system

• a) feedback
• b) infinite
• c) zero
• d) none of the above

Answer

22) The transfer function of the control system depends on

• a) the system parameters alone
• b) nature of the input
• c) initial conditions of input and output
• d) nature of the output 

Answer

23) Error constants of a system are a measure of 

• a) transient state response
• b) steady-state response as well as a transient state response
• c) relative stability
• d) steady-state response

Answer

24) Transient response is improved in case of 

• a) lag network
• b) lead network
• c) both A and B
• d) None of these 

Answer

25) Which of the following controller is also known as anticipatory controllers? 

• a) proportional controller 
• b) integral controller 
• c) derivative controller 
• d) both 1 and 3 

Answer

26) The magnitude condition for root locus is________.

• a) |G(s)H(s)| = 0 
• b) |G(s)H(s)| = 2 
• c) |G(s)H(s)| = 1 
• d) |G(s)H(s)| = ∞ 

Answer

27) A lag compensator 

• a) increases the damping ratio 
• b) decreases the damping ratio 
• c) increases the bandwidth 
• d) increases the stability 

Answer

28) If the bandwidth of the system is very broad, then the response of the system is 

• a) faster 
• b) slower
• c) independent of bandwidth 
• d) none of the above 

Answer

29) Which of the following is the correct formula for the transfer function of an electrical RC phase lag compensating network?

• a) RCS/(1+RCS) 
• b) RC/(1+RCS) 
• c) C/(1+RCS) 
• d) 1/(1+RCS) 

Answer

30) Traffic signal light system is the example of_______. 

• a) Open-loop system 
• b) Closed-loop system 
• c) Both (a) and (b) 
• d) None of these

Answer

This was about the “Control System Quiz“. I hope this article may help you all a lot. Thank you for reading.

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