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MCQs

Total Questions : 125 | Page 11 of 13 pages
Question 101. A signal other than the reference input that tends to affect the value of controlled variable is known as
  1.    Disturbance
  2.    Command
  3.    Control element
  4.    Reference input
 Discuss Question
Answer: Option A. -> Disturbance
Question 102. The first order control system, which is well designed, has a
  1.    small bandwidth
  2.    negative time constant
  3.    large negative transfer function pole
  4.    none of the above
 Discuss Question
Answer: Option C. -> large negative transfer function pole
Question 103. A good control system has all the following features except
  1.    good stability
  2.    slow response
  3.    good accuracy
  4.    sufficient power handling capacity
 Discuss Question
Answer: Option B. -> slow response
Question 104. The effect of error damping is to
  1.    provide larger settling lime
  2.    delay the response
  3.    reduce steady state error
  4.    any of the above
 Discuss Question
Answer: Option C. -> reduce steady state error
Question 105. A differentiator is usually not a part of a control system because it
  1.    reduces damping
  2.    reduces the gain margin
  3.    increases input noise
  4.    increases error
 Discuss Question
Answer: Option C. -> increases input noise
Question 106. Which among the following plays a crucial role in determining the state of dynamic system?
  1.    state variables
  2.    state vector
  3.    state space
  4.    state scalar
 Discuss Question
Answer: Option A. -> state variables
Question 107. Which among the following are the interconnected units of state diagram representation?
  1.    scalars
  2.    adders
  3.    integrator
  4.    all of the mentioned
 Discuss Question
Answer: Option D. -> all of the mentioned
Question 108. Which of the following are the not characteristics of the closed loop systems?
  1.    it does not compensate for disturbance
  2.    it reduces the sensitivity of plant-parameter variations
  3.    it does not involve output measurements
  4.    it does not has the ability to control the system transient response
 Discuss Question
Answer: Option D. -> it does not has the ability to control the system transient response
Question 109. Which mechanism in control engineering implies an ability to measure the state by taking measurements at output?
  1.    controllability
  2.    observability
  3.    differentiability
  4.    adaptability
 Discuss Question
Answer: Option B. -> observability
Question 110. Which one of the following is not the property of root loci?
  1.    the root locus is symmetrical about imaginary axis
  2.    they start from the open loop poles and terminate at the open loop zeroes
  3.    the breakaway points are determined from dk/ds = 0
  4.    segments of the real axis are the part of the root locus if and only is the total number of real poles and zeroes to their right is od
 Discuss Question
Answer: Option A. -> the root locus is symmetrical about imaginary axis

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