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MCQs

Total Questions : 125 | Page 7 of 13 pages
Question 61. Which of the following is the definition of proportional band of a controller ?
  1.    The range of air output as measured variable varies from maximum to minimum
  2.    The range of measured variables from set value
  3.    The range of measured variables through which the air output changes from maximum to minimum
  4.    Any of the above
  5.    None of the above
 Discuss Question
Answer: Option C. -> The range of measured variables through which the air output changes from maximum to minimum
Question 62. Has tendency to oscillate.
  1.    Open loop system
  2.    Closed loop system
  3.    Both (A) and (B)
  4.    Neither (A) nor (B)
 Discuss Question
Answer: Option B. -> Closed loop system
Question 63. An amplidyne can give which of the following characteristics ?
  1.    Constant current
  2.    Constant voltage
  3.    Constant current as well as constant voltage
  4.    Constant current, constant voltage and constant power
  5.    None of the above
 Discuss Question
Answer: Option D. -> Constant current, constant voltage and constant power
Question 64. In a control system the output of the controller is given to
  1.    Final control element
  2.    Amplifier
  3.    Comparator
  4.    Sensor
 Discuss Question
Answer: Option A. -> Final control element
Question 65. Technique is not applicable to nonlinear system ?
  1.    Nyquist Criterion
  2.    Quasi linearization
  3.    Functional analysis
  4.    Phase-plane representation
 Discuss Question
Answer: Option A. -> Nyquist Criterion
Question 66. A phase lag lead network introduces in the output
  1.    lag at all frequencies
  2.    lag at high frequencies and lead at low frequencies
  3.    lag at low frequencies and lead at high frequencies
  4.    none of the above
 Discuss Question
Answer: Option C. -> lag at low frequencies and lead at high frequencies
Question 67. The viscous friction co-efficient, in force-voltage analogy, is analogous to
  1.    charge
  2.    resistance
  3.    reciprocal of inductance
  4.    reciprocal of conductance
  5.    none of the above
 Discuss Question
Answer: Option B. -> resistance
Question 68. The capacitance, in force-current analogy, is analogous to
  1.    momentum
  2.    velocity
  3.    displacement
  4.    mass
 Discuss Question
Answer: Option D. -> mass
Question 69. Mass, in force-voltage analogy, is analogous to
  1.    charge
  2.    current
  3.    inductance
  4.    resistance
 Discuss Question
Answer: Option C. -> inductance
Question 70. 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

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