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MCQs

Total Questions : 95 | Page 7 of 10 pages
Question 61. Integral control action
  1.    Neither (a) nor (b)
  2.    Both (a) and (b)
  3.    Removes offset
  4.    May lead to oscillatory response
 Discuss Question
Answer: Option B. -> Both (a) and (b)
Question 62. 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 63. Gain margin and phase margin can be determined from Bode plots as well as Nyquist plot.
  1.    False
  2.    True
 Discuss Question
Answer: Option B. -> True
Question 64. For a stable system having two or more gain crossover frequencies the phase margin is measured at the highest crossover frequency.
  1.    False
  2.    True
 Discuss Question
Answer: Option B. -> True
Question 65. In the field controlled motor the entire damping comes from
  1.    Motor friction and load
  2.    Armature resistance
  3.    Back emf
  4.    Field resistance
 Discuss Question
Answer: Option A. -> Motor friction and load
Question 66. For type 1 system the velocity lag error is
  1.    Inversely proportional to gain constant
  2.    Inversely proportional to bandwidth of system
  3.    Independent of gain constant
  4.    Directly proportional to gain constant
 Discuss Question
Answer: Option A. -> Inversely proportional to gain constant
Question 67. 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, 2 and 3
  3.    All
  4.    1 and 2
 Discuss Question
Answer: Option D. -> 1 and 2
Question 68. In control systems the output of sensor usually, is
  1.    Digital electrical signal
  2.    Mechanical signal
  3.    Analog electrical signal
  4.    Analog or digital electrical signal
 Discuss Question
Answer: Option D. -> Analog or digital electrical signal
Question 69. The effect of adding poles and zeros can be determined quickly by
  1.    Bode plot
  2.    Nyquist plot
  3.    Nichols chart
  4.    Root locus
 Discuss Question
Answer: Option A. -> Bode plot
Question 70. M circles are symmetrical with respect to
  1.    M = 1 straight line and real axis
  2.    M = 1 straight line
  3.    M = 1 straight line and imaginary axis
  4.    Real and imaginary axis
 Discuss Question
Answer: Option A. -> M = 1 straight line and real axis

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