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MCQs

Total Questions : 125 | Page 8 of 13 pages
Question 71. A control system working under unknown random actions is called
  1.    Computer control system
  2.    Digital data system
  3.    Stochastic control system
  4.    Adaptive control system
 Discuss Question
Answer: Option C. -> Stochastic control system
Question 72. From which of the following transfer function can be obtained ?
  1.    Signal flow graph
  2.    Analogous table
  3.    Output-input ratio
  4.    Standard block system
  5.    None of the above
 Discuss Question
Answer: Option A. -> Signal flow graph
Question 73. Which of the following is an open loop control system ?
  1.    Field controlled D.C. motor
  2.    Ward leonard control
  3.    Metadyne
  4.    Stroboscope
 Discuss Question
Answer: Option A. -> Field controlled D.C. motor
Question 74. Which of the following devices is used for conversion of co-ordinates ?
  1.    Microsyn
  2.    Selsyn
  3.    Synchro-resolver
  4.    Synchro-transformer
 Discuss Question
Answer: Option C. -> Synchro-resolver
Question 75. Which of the following is exhibited by Root locus diagrams ?
  1.    The poles of the transfer function for a set of parameter values
  2.    The bandwidth of the system
  3.    The response of a system to a step input
  4.    The frequency response of a system
  5.    None of the above
 Discuss Question
Answer: Option A. -> The poles of the transfer function for a set of parameter values
Question 76. Which of the following devices are commonly used as error detectors in instruments ?
  1.    Vernistats
  2.    Microsyns
  3.    Resolvers
  4.    Any of the above
 Discuss Question
Answer: Option D. -> Any of the above
Question 77. Which of the following statements is not necessarily correct for open control system ?
  1.    Input command is the sole factor responsible for providing the control action
  2.    Presence of non-linearities causes malfunctioning
  3.    Less expensive
  4.    Generally free from problems of non-linearities
 Discuss Question
Answer: Option B. -> Presence of non-linearities causes malfunctioning
Question 78. The on-off controller is a _____ system.
  1.    digital
  2.    linear
  3.    non-linear
  4.    discontinuous
 Discuss Question
Answer: Option C. -> non-linear
Question 79. The phase lag produced by transportation relays
  1.    is independent of frequency
  2.    increases linearly with frequency
  3.    decreases linearly with frequency
 Discuss Question
Answer: Option B. -> increases linearly with frequency
Question 80. A controller, essentially, is a
  1.    sensor
  2.    clipper
  3.    comparator
  4.    amplifier
 Discuss Question
Answer: Option C. -> comparator

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