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MCQs

Total Questions : 95 | Page 10 of 10 pages
Question 91. A conditionally stable system is stable for the value of gain between two critical values. It is unstable if
  1.    Both A and B
  2.    None of these
  3.    The gain is increased beyond upper critical value
  4.    The gain is decreased below lower critical value
 Discuss Question
Answer: Option A. -> Both A and B
Question 92. If any term in the first column of a Routh array becomes zero, then
  1.    Routh criterion can be used by substituting a small negative number for zero and complet-ing the array
  2.    Routh criterion cannot be used to determine stability
  3.    Routh criterion can be used by substituting a big positive number for zero and completing the array
  4.    Routh criterion can be used by substituting a small positive number for zero and completing the array
 Discuss Question
Answer: Option D. -> Routh criterion can be used by substituting a small positive number for zero and completing the array
Question 93. Which of the following is used to obtain output position in a position control system?
  1.    Strain gauge
  2.    Thermistor
  3.    Load cell
  4.    Synchro
 Discuss Question
Answer: Option C. -> Load cell
Question 94. Temperature is analogous to
  1.    Flux
  2.    Voltage
  3.    Charge
  4.    None of these
 Discuss Question
Answer: Option B. -> Voltage
Question 95. Which dc servomotor requires strongest permanent magnet?
  1.    Slotted armature
  2.    Surface wound with stationary rotor
  3.    Surface wound armature
  4.    Either A or B
 Discuss Question
Answer: Option B. -> Surface wound with stationary rotor

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