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MCQs

Total Questions : 95 | Page 6 of 10 pages
Question 51. Lag compensation permits a high gain at low frequencies.
  1.    False
  2.    True
 Discuss Question
Answer: Option B. -> True
Question 52. In root locus analysis the breakaway and break in points
  1.    lie on the real axis
  2.    Always occur in complex conjugate pairs
  3.    Either lie on the real axis or occur in complex conjugate pairs
  4.    None of these
 Discuss Question
Answer: Option C. -> Either lie on the real axis or occur in complex conjugate pairs
Question 53. The complicated shapes in the polar plots are only due to time constants in the numerator of transfer functions.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 54. A lag compensator
  1.    Improves steady state behavior of the system
  2.    Speeds up the transient response of the system
  3.    Improves steady state behavior and preserves the transient response of the system
  4.    Improves steady state behavior and speeds up the transient response of the system
 Discuss Question
Answer: Option C. -> Improves steady state behavior and preserves the transient response of the system
Question 55. Which of the following features is not associated with Nichols chart?
  1.    (0 dB, -180°) point on Nichols chart represent critical Point (-1, 0)
  2.    M loci are centred about (0 dB, -180°) point
  3.    The frequency at intersection of G(j?) locus and M = +3 dB locus gives bandwidth of closed loop system
  4.    It is symmetric about -180°
 Discuss Question
Answer: Option C. -> The frequency at intersection of G(j?) locus and M = +3 dB locus gives bandwidth of closed loop system
Question 56. The relative stability of a system is given by
  1.    Phase margin alone
  2.    Both phase and gain margins
  3.    Gain margin alone
  4.    Either (a) or (b)
 Discuss Question
Answer: Option B. -> Both phase and gain margins
Question 57. A lead compensator
  1.    None of these
  2.    Speeds up the transient response
  3.    Increases the stability margin and speeds up the transient-response.
  4.    Increases the stability margin
 Discuss Question
Answer: Option C. -> Increases the stability margin and speeds up the transient-response.
Question 58. Robotic manipulator arms mostly use
  1.    Pneumatic actuator
  2.    Electric motor actuator
  3.    Hydraulic actuator
  4.    None of these
 Discuss Question
Answer: Option B. -> Electric motor actuator
Question 59. Transport lag usually exists in
  1.    Pneumatic systems
  2.    Thermal, hydraulic and pneumatic systems
  3.    Thermal systems
  4.    Hydraulic systems and thermal systems
 Discuss Question
Answer: Option B. -> Thermal, hydraulic and pneumatic systems
Question 60. Nichol’s chart is symmetric about – 180° axis.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True

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