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MCQs

Total Questions : 604 | Page 2 of 61 pages
Question 11. For a stable system having two or more gain crossover frequencies the phase margin is measured at the highest crossover frequency.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 12. In the field controlled motor the entire damping comes from
  1.    Armature resistance
  2.    Back emf
  3.    Motor friction and load
  4.    Field resistance
 Discuss Question
Answer: Option C. -> Motor friction and load
Question 13. In Bode plots the frequency at which two asymptotes meet is called corner frequency.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 14. Integral control action
  1.    Removes offset
  2.    May lead to oscillatory response
  3.    Both (a) and (b)
  4.    Neither (a) nor (b)
 Discuss Question
Answer: Option C. -> Both (a) and (b)
Question 15. Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 16. For type 1 system the velocity lag error is
  1.    Inversely proportional to bandwidth of system
  2.    Directly proportional to gain constant
  3.    Inversely proportional to gain constant
  4.    Independent of gain constant
 Discuss Question
Answer: Option C. -> Inversely proportional to gain constant
Question 17. The effect of adding poles and zeros can be determined quickly by
  1.    Nichols chart
  2.    Nyquist plot
  3.    Bode plot
  4.    Root locus
 Discuss Question
Answer: Option C. -> Bode plot
Question 18. Which of the following can be used as a rotating amplifier in a control system?
1. Amplidyne
2. Separately excited dc generator
3. Synchro
4. Self excited dc generator
  1.    3 and 4
  2.    1 and 2
  3.    1, 2 and 3
  4.    All
 Discuss Question
Answer: Option B. -> 1 and 2
Question 19. In control systems the output of sensor usually, is
  1.    Analog electrical signal
  2.    Digital electrical signal
  3.    Mechanical signal
  4.    Analog or digital electrical signal
 Discuss Question
Answer: Option D. -> Analog or digital electrical signal
Question 20. M circles are symmetrical with respect to
  1.    Real and imaginary axis
  2.    M = 1 straight line and real axis
  3.    M = 1 straight line and imaginary axis
  4.    M = 1 straight line
 Discuss Question
Answer: Option B. -> M = 1 straight line and real axis

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