Electronic Engineering MCQ Question Papers: ENTC, IT Interview Placement

Subject: Control Systems 3

**Part 3: List for questions and answers of Control Systems**

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**Q1. In frequency response, the resonance frequency is basically a measure of _______ of reaponce**

**a) speed**

**b) Distance**

**c) Angle**

**d) Curvature**

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**Q2. If a system is said to have a damping ****?**** = 0.5532 with the natural frequency Wn = 2 ****rad/sec, what will be the value of resonant frequency (Wr)?**

**a) 1.2456 rad/s**

**b) 1.7352 rad/s**

**c) 2.3421 rad/s**

**d) 3.66 rad/s**

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**Q3. If the resonant peak is estimated to be ‘5’, which among the following would be the ****correct value of damping?**

**a) ****ξ = 0.3**

**b) **ξ ** = 1**

**c) **ξ ** = 3.2**

**d) **ξ ** = 5.55**

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**Q4. If the damping of the system becomes equal to zero, which condition of the resonant ****frequency is likely to occur?**

**a) Wr = Wd**

**b) Wr is greater than Wn**

**c) Wr is less than Wn**

**d) Wr = Wn**

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**Q5. At which condition of **ξ **, resonant peak does not exist and its maximum value is ****considered to be unity along with zero resonant frequency?**

**a) 0 is less than î¾ is less than 0.707**

**b) **ξ ** is greater than 0.707**

**c) **ξ ** = 0**

**d) **ξ ** = 1 **

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**Q6. If ****?**** approaches to zero, the peak resonance would ________**

**a) Also be zero**

**b) Be unity**

**c) tend to infinity**

**d) Become equal to peak overshoot**

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**Q7. For a unity feedback system with g(s) = 10 / s2, what would be the value of centroid?**

**a) 0**

**b) 2**

**c) 5**

**d) 10**

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**Q8. If poles are added to the system, where will the system tend to shift the root locus?**

**a) To the left of an imaginary axis**

**b) to the right of an imaginary axis**

**c) At the centre**

**d) No shifting takes place**

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**Q9. If the system is represented by characteristic equation s^6 + s^4 + s^3 + s^2 + s + 3 = 0, then ****the system is_________**

**a) Stable**

**b) unstable**

**c) Marginally stable**

**d) Unpredictable**

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**Q10. Consider the equation s^3 + 3s^2 + 5^s + 2 = 0. How many roots are located in left half of ****s-plane?**

**a) Zero**

**b) Two**

**c) three**

**d) Four**

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**Q11. On which factor does the steady state error of the system depend?**

**a) Order**

**b) type**

**c) Size**

**d) Prototype **

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**Q12. If a type 1 system is subjected to parabolic input, what will be the value of steady state ****error?**

**a) 0**

**b) 100**

**c) Constant k**

**d) infinite**

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**Q13. In signal flow graph, the product of all ______gains while going through a forward path ****is known as ‘path gain’**

**a) branch**

**b) Path**

**c) Node**

**d) Loop**

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**Q14. The value of variables at each node is _________the algebraic sum of all signals ****arriving at that node**

**a) Less than**

**b) equal to**

**c) Greater than**

**d) None of the above**

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**Q15. At summing point, more than one signal can be added or _________**

**a) subtracted**

**b) Multiplied**

**c) Both a and b**

**d) None of the above**

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**Q16. Which among the following are the elements of rotational motion?**

**a) Mass, spring, friction**

**b) inertia, damper, spring**

**c) Work, energy, power**

**d) Force, pressure, viscocity**

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**Q17. If an impulse response of a system is e^-5t, what would be its transfer function?**

**a) 1/ s – 5**

**b) 1/ s + 5**

**c) (s+1) / (s+5)**

**d) (s2 – 5s)/ (s-5) **

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**Q18. What should be the nature of bandwidth for a good control system?**

**a) large**

**b) Small**

**c) Medium**

**d) All of the above**

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**Q19. Which system exhibits the initiation of corrective action only after the output gets ****affected?**

**a) Feed forward**

**b) feedback**

**c) Both a and b**

**d) None of the above**

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**Q20. What should be the nature of bandwidth for a good control system?**

**a) large**

**b) Small**

**c) Medium**

**d) All of the above **

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**Part 3: List for questions and answers of Control Systems**

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**Q1. Answer: a**

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**Q2. Answer: a**

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**Q3. Answer: a**

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**Q4. Answer: b**

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**Q5. Answer: b**

**Q6. Answer: c**

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**Q7. Answer: a**

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**Q8. Answer: b**

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**Q9. Answer: b**

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**Q10. Answer: c**

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**Q11. Answer: b**

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**Q12. Answer: d**

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**Q13. Answer: a**

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**Q14. Answer: b**

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**Q15. Answer: a**

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**Q16. Answer: d**

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**Q17. Answer: b**

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**Q18. Answer: a**

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**Q19. Answer: b**

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**Q20. Answer: a**