Electrical Engineering MCQ Question Papers: Campus Placement

Subject: Control System 6

**Part 6: List for questions and answers of Control System I**

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**Q1.The system function N(s) = V(s)/I(s) = (s+3)/(4s+5). The system is initially at rest. If the ****excitation i(t) is a unit step, which of the following is the final value?**

**a) 1/4**

**b) 3/5**

**c) 1**

**d) 0**

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**Q2.Given a unity feedback system with G(s) = k/s(s+4), the value of k for damping ratio of ****0.5 is**

**a) 1**

**b) 4**

**c) 16**

**d) 64**

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**Q3.The type number of the control system with G(s) = k(s+2)/(s(s^2+2s+3) is**

**a) 0**

**b) 1**

**c) 2**

**d) 3**

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**Q4.For type 1 system with parabolic input, the steady state error is**

**a) Zero**

**b) Finite constant**

**c) Fnfinite**

**d) Indeterminate**

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**Q5.what is the Laplace transform of a function d (t-2)?**

**a) 2**

**b) 0**

**c) 2s**

**d) e^-2s**

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**Q6.The impulse response of a linear system is e^-t, (t > 0). The corresponding transfer ****function is**

**a) 1/s(s+1)**

**b) 1/(s+1)**

**c) 1/s**

**d) s/(s+1) **

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**Q7.Time taken for the response to raise from zero to 100 % for very first time is called**

**a) Rise time**

**b) Settling time**

**c) Delay time**

**d) Peak time**

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**Q8.Time taken by the response to reach and stay within a specified error is called**

**a) Raise time**

**b) Peak time**

**c) Settling time**

**d) Peak over shoot**

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**Q9.An open loop, represented by the transfer function G ( s ) = ( s – 1 ) / ( s + 2 )( s + 3 ), is**

**a) Stable and of the non-minimum phase type**

**b) Stable and of the minimum phase type**

**c) Unstable and of the minimum phase type**

**d) Unstable and of the non minimum phase type**

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**Q10.Lead network is used to improve**

**a) Improve transient response**

**b) Both A and C**

**c) Increase bandwidth**

**d) Improve steady state response**

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**Q11.Type and order of transfer function G ( s ) = K / {s( s + 2 )}**

**a) 1, 2**

**b) 2, 1**

**c) 0, 2**

**d) 1, 1**

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**Q12. Name test signals used in time response analysis?**

**a) Unit step**

**b) Unit ramp**

**c) Impulse**

**d) All of A, B, C**

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**Q13.A system is stable for**

**a) GM and PM both +ve**

**b) GM and PM both -ve**

**c) GM -ve**

**d) PM – ve **

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**Q14.In control system integrator is represented by**

**a) S**

**b) S^2**

**c) 1 / S^2**

**d) 1 / s**

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**Q15.For lead compensator pole lies**

**a) on LHS before zero**

**b) On origin**

**c) On LHS**

**d) On RHS**

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**Q16.Number of roots in left hand half of s plane if characteristic equation is S^3 – 4S^2 + s + ****6 = 0 ?**

**a) 1**

**b) 2**

**c) 3**

**d) 0**

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**Q17.The value of gain margin of the system having G ( s )H ( s ) = 8 / ( s + 2 )^3 is**

**a) 8**

**b) 2**

**c) 6**

**d) 4**

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**Q18.The second order system is defined by 25 / ( S^2 + 5s + 25) is given step input. The time ****taken for the output to settle with in 2 % of input is**

**a) 1.65 sec**

**b) 1.2 sec**

**c) 2 sec**

**d) 0.4 sec**

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**Q19.The amplitude spectrum of a Gaussion pulse is**

**a) Uniform**

**b) A sin function**

**c) All of B, C, D.Gaussion**

**d) Impulse function **

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**Q20.If two blocks having gains A and B respectively are in parallel connection, find the ****resultant gain using block diagram reduction technique?**

**a) A+B**

**b) A*B**

**c) A/B**

**d) 2(A+B) **

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**Part 6: List for questions and answers of Control System I**

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**Q1. Answer: b**

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**Q2. Answer: c**

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**Q3. Answer: c**

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**Q4. Answer: c**

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**Q5. Answer: d**

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**Q6. Answer: b**

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**Q7. Answer: a**

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**Q8. Answer: c**

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**Q9. Answer: a**

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**Q10. Answer: b**

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**Q11. Answer: a**

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**Q12. Answer: d**

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**Q13. Answer: a**

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**Q14. Answer: d**

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**Q15. Answer: a**

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**Q16. Answer: a**

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**Q17. Answer: a**

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**Q18. Answer: a**

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**Q19. Answer: c**

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**Q20. Answer: a**