Electrical Engineering MCQ Question Papers: Campus Placement

Subject: Control System 9

**Part 3: List for questions and answers of Control System II**

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**Q1. Which plots in frequency domain represent the two separate plots of magnitude and ****phase against frequency in logarithmic value?**

**a) Polar plots**

**b) Bode plots**

**c) Nyquist plots**

**d) None of these**

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**Q2. If the system is specified by open loop transfer function G(s)H(s) = k / s(s+3) (s + 2), how ****many root loci proceed to end at infinity?**

**a) 2**

**b) 3**

**c) 5**

**d) 6**

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**Q3. What should be the nature of root locus about the real axis?**

**a) Asymmetric**

**b) Symmetric**

**c) Exponential**

**d) Decaying**

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**Q4. Which point on root locus specifies the meeting or collision of two poles?**

**a) Centroid**

**b) Break away point**

**c) Stability point**

**d) Anti-break point**

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**Q5. For drawing root locus, the angle of asymptote yields the direction along which ****_________branches approach to infinity**

**a) p + z**

**b) p – z**

**c) p / z**

**d) p x z**

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**Q6.In a second order system, if the damping ratio is greater than equal to ‘1’, then what ****would be the nature of roots?**

**a) Imaginary**

**b) Real and equal**

**c) Real but not equal**

**d) Complex conjugate **

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**Q7. Which of the following is the analogous quantity for mass element in force-voltage ****analogy?**

**a) Resistance**

**b) Inductance**

**c) Capacitance**

**d) All of the above**

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**Q8. In accordance to relative stability, the settling time exhibits inversely proportional ****nature to ________parts of roots**

**a) Real positive**

**b) Real negative**

**c) Imaginary positive**

**d) Imaginary negative**

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**Q9. Consider that the pole is located at origin and its laplace representation is 1/s. What ****would be the nature of pole response?**

**a) Rising exponential**

**b) Decaying exponential**

**c) Sinusoidal**

**d) Constant value**

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**Q10. Which controller has the potential to eliminate/overcome the drawback of offset in ****proportional controllers?**

**a) P-I**

**b) -D**

**c) Both a and b**

**d) None of the above**

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**Q11. Which time is responsible for introducing an error in the temperature regulation of ****applications associated with ON-OFF controllers?**

**a) Rise time**

**b) Dead time**

**c) Switching time**

**d) Decay time**

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**Q12. If an error signal e(t) of an ON-OFF controller is found to be greater than zero, what ****would be its output?**

**a) 10%**

**b) 50%**

**c) 80%**

**d) 100% **

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**Q13. State space analysis is applicable even if the initial conditions are _____**

**a) Zero**

**b) Non-zero**

**c) Equal**

**d) Not equal**

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**Q14. Conventional control theory is applicable to ______ systems**

**a) SISO**

**b) MIMO**

**c) Time varying**

**d) Non-linear**

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**Q15. In polar plots, if a pole is added at the origin, what would be the value of the ****magnitude at Ω = 0?**

**a) Zero**

**b) Infinity**

**c) Unity**

**d) Unpredictable**

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**Q16. In polar plots, what does each and every point represent w.r.t magnitude and angle?**

**a) Scalar**

**b) Vector**

**c) Phasor**

**d) Differentiator**

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**Q17. In an octave frequency band, the ratio of f2 / f1 is equivalent to ________**

**a) 2**

**b) 4**

**c) 8**

**d) 10**

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**Q18. Which unit is adopted for magnitude measurement in Bode plots?**

**a) Degree**

**b) Decimal**

**c) Decibel**

**d) Deviation **

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**Q19. 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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**Q20. 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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**Part 3: List for questions and answers of Control System II**

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**Q1. Answer: b**

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**Q2. Answer: b**

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**Q3. Answer: b**

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**Q4. Answer: b**

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**Q5. Answer: b**

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**Q6. Answer: c**

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**Q7. Answer: b**

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**Q8. Answer: b**

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**Q9. Answer: d**

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**Q10. Answer: a**

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**Q11. Answer: b**

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**Q12. Answer: d**

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**Q13. Answer: b**

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**Q14. Answer: a**

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**Q15. Answer: b**

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**Q16. Answer: c**

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**Q17. Answer: a**

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**Q18. Answer: c**

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**Q19. Answer: a**

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**Q20. Answer: b**