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MCQs

Total Questions : 125 | Page 9 of 13 pages
Question 81. Directly converts temperature into voltage.
  1.    Thermocouple
  2.    Potentiometer
  3.    Gear train
  4.    LVDT
  5.    None of the above
 Discuss Question
Answer: Option A. -> Thermocouple
Question 82. Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero ?
  1.    The system is relatively stable
  2.    The system is highly stable
  3.    The system is highly oscillatory
  4.    None of the above
 Discuss Question
Answer: Option C. -> The system is highly oscillatory
Question 83. When the initial conditions of a system are specified to be zero it implies that the system is
  1.    At rest without any energy stored in it
  2.    Working normally with reference input
  3.    Working normally with zero reference input
  4.    At rest but stores energy
 Discuss Question
Answer: Option A. -> At rest without any energy stored in it
Question 84. In pneumatic control systems the control valve used as final control element converts
  1.    Pressure signal to electric signal
  2.    Pressure signal to position change
  3.    Electric signal to pressure signal
  4.    Position change to pressure signal
 Discuss Question
Answer: Option B. -> Pressure signal to position change
Question 85. In order to increase the damping of a badly underdamped system which of following compensators may be used ?
  1.    Phase-lead
  2.    Phase-lag
  3.    Both (A) and (B)
  4.    Either (A) and (B)
  5.    None of the above
 Discuss Question
Answer: Option A. -> Phase-lead
Question 86. Static error coefficients are used as a measure of the effectiveness of closed loop systems for specified ________ input signal.
  1.    acceleration
  2.    velocity
  3.    position
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Question 87. A.C. servomotor resembles
  1.    two phase induction motor
  2.    Three phase induction motor
  3.    direct current series motor
  4.    universal motor
 Discuss Question
Answer: Option A. -> two phase induction motor
Question 88. The temperature, under thermal and electrical system analogy, is considered analogous to
  1.    voltage
  2.    current
  3.    capacitance
  4.    charge
  5.    none of the above
 Discuss Question
Answer: Option A. -> voltage
Question 89. In liquid level and electrical system analogy, voltage is considered analogous to
  1.    head
  2.    liquid flow
  3.    liquid flow rate
  4.    none of the above
 Discuss Question
Answer: Option A. -> head
Question 90. In electrical pneumatic system analogy the current is considered analogous to
  1.    velocity
  2.    pressure
  3.    air flow
  4.    air flow rate
 Discuss Question
Answer: Option D. -> air flow rate

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