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MCQs

Total Questions : 604 | Page 4 of 61 pages
Question 31. In force current analogy, displacement x is analogous to
  1.    Charge
  2.    Magnetic flux linkage
  3.    Electrostatic energy
  4.    Voltage
 Discuss Question
Answer: Option B. -> Magnetic flux linkage
Question 32. If the poles lie in second quadrant, damping ratio is
  1.    1
  2.    less than 1
  3.    zero
  4.    more than 1
 Discuss Question
Answer: Option B. -> less than 1
Question 33. If poles lie in first quadrant, damping ratio is
  1.    1
  2.    More than 1
  3.    less than 1
  4.    Zero
 Discuss Question
Answer: Option C. -> less than 1
Question 34. In a simple on-off controller with differential gap, the magnitude of differential gap determines
  1.    The level of accuracy
  2.    The life of controller
  3.    Both (a) and (b)
  4.    Neither (a) nor (b)
 Discuss Question
Answer: Option C. -> Both (a) and (b)
Question 35. Bandwidth is proportional to speed of response.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 36. Which of the following is correct?
  1.    Speed torque characteristics of permanent magnet dc servomotor is more flat than that of wound field dc servomotor
  2.    Speed torque characteristics of wound field dc servo- motor is more flat than that of per-manent magnet dc servo motor
  3.    Speed torque characteristics of wound field and permanent magnet dc servomotor are equally flat
  4.    None of the above
 Discuss Question
Answer: Option A. -> Speed torque characteristics of permanent magnet dc servomotor is more flat than that of wound field dc servomotor
Question 37. The distance of poles from origin depends on
  1.    Uqndamped natural frequency
  2.    Damping ratio
  3.    Both A and B
  4.    Neither A nor B
 Discuss Question
Answer: Option A. -> Uqndamped natural frequency
Question 38. The permanent magnet field system of brushless dc servo- motor is generally on
  1.    Stator
  2.    Rotor
  3.    Partly on stator and partly on rotor
  4.    Either (a) or (b)
 Discuss Question
Answer: Option B. -> Rotor
Question 39. For any transfer function, the constant phase angle loci are
  1.    A family of circles
  2.    A family of straight lines
  3.    Either (a) or (b)
  4.    Neither (a) nor (b)
 Discuss Question
Answer: Option A. -> A family of circles
Question 40. The addition of a pole to the open loop transfer function pulls the root locus
  1.    To the right
  2.    To the left and making the system more stable
  3.    Towards right or left depending on the position of new pole
  4.    None of the above
 Discuss Question
Answer: Option A. -> To the right

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