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MCQs

Total Questions : 125 | Page 6 of 13 pages
Question 51. An automatic toaster is a ______ loop control system.
  1.    open
  2.    closed
  3.    partially closed
  4.    any of the above
 Discuss Question
Answer: Option A. -> open
Question 52. Is an open loop control system.
  1.    Ward Leonard control
  2.    Field controlled D.C. motor
  3.    Stroboscope
  4.    Metadyne
 Discuss Question
Answer: Option B. -> Field controlled D.C. motor
Question 53. Regenerative feedback implies feedback with
  1.    oscillations
  2.    step input
  3.    negative sign
  4.    positive sign
 Discuss Question
Answer: Option D. -> positive sign
Question 54. A.C. servomotor is basically a
  1.    universal motor
  2.    single phase induction motor
  3.    two phase induction motor
  4.    three phase induction motor
 Discuss Question
Answer: Option C. -> two phase induction motor
Question 55. For open control system which of the following statements is incorrect ?
  1.    Less expensive
  2.    Recalibration is not required for maintaining the required quality of the output
  3.    Construction is simple and maintenance easy
  4.    Errors are caused by disturbances
 Discuss Question
Answer: Option B. -> Recalibration is not required for maintaining the required quality of the output
Question 56. By which of the following the system response can be tested better ?
  1.    Ramp input signal
  2.    Sinusoidal input signal
  3.    Unit impulse input signal
  4.    Exponentially decaying signal
 Discuss Question
Answer: Option C. -> Unit impulse input signal
Question 57. Zero initial condition for a system means
  1.    input reference signal is zero
  2.    zero stored energy
  3.    ne initial movement of moving parts
  4.    system is at rest and no energy is stored in any of its components
 Discuss Question
Answer: Option D. -> system is at rest and no energy is stored in any of its components
Question 58. In closed loop control system, with positive value of feedback gain the overall gain of the system will
  1.    decrease
  2.    increase
  3.    be unaffected
  4.    any of the above
 Discuss Question
Answer: Option A. -> decrease
Question 59. Is not a final control element.
  1.    Control valve
  2.    Potentiometer
  3.    Electropneumatic converter
  4.    Servomotor
 Discuss Question
Answer: Option B. -> Potentiometer
Question 60. Signal will become zero when the feedback signal and reference signs are equal.
  1.    Input
  2.    Actuating
  3.    Feedback
  4.    Reference
 Discuss Question
Answer: Option B. -> Actuating

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