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MCQs

Total Questions : 604 | Page 9 of 61 pages
Question 81. When compared to a 1st order LPF, a 2nd order LPF has
  1.     faster drop in filter response.
  2.     lower voltage gain.
  3.     higher cut off frequency.
  4.     higher voltage gain.
 Discuss Question
Answer: Option C. ->  higher cut off frequency.
Question 82. The type of a control system is obtained from -------------- transfer function?
  1.     open loop
  2.     closed loop
  3.     both open loop and closed loop
  4.     none of above.
 Discuss Question
Answer: Option A. ->  open loop
Question 83. The impulse response of the system described by the differential equation will be
  1.     1/3.
  2.     (1/3) × (1-e-3t).
  3.     e-3t u(t).
  4.     e6t.
 Discuss Question
Answer: Option A. ->  1/3.
Question 84. What is the type of closed loop system for the plant transfer function G(s) = k/s²(1+Ts) and with unity feedback?
  1.     2
  2.     3
  3.     0
  4.     1
 Discuss Question
Answer: Option A. ->  2
Question 85. What is the order of a closed loop control system for a plant with a transfer function equal to G(s) = k/s²(1+Ts) and with unity feedback
  1.     0
  2.     2
  3.     3
  4.     1
 Discuss Question
Answer: Option C. ->  3
Question 86. Which of the following statement is/are true statements?
  1.     The steady state analysis depends on type of the system
  2.     Transient state analysis depends on order of the system
  3.    All of these
  4.     Type of the system is obtained from open loop transfer function
 Discuss Question
Answer: Option C. -> All of these
Question 87. A second order control system is defined by the following equation: 4 d²c(t)/dt² + 8 dc(t)/dt + 16 c(t) = 16 u(t) The damping ratio and natural frequency for this system are respectively
  1.     0.25 and 4 rad/s
  2.     0.50 and 4 rad/s
  3.     0.50 and 2 rad/s
  4.     0.25 and 2 rad/s
 Discuss Question
Answer: Option C. ->  0.50 and 2 rad/s
Question 88. The impulse response of a system is c(t) = -te-t + 2 e-t (t>0). Its closed loop transfer function is
  1.     (2s+2)/s²
  2.     (2s+2)/(s+1)²
  3.     (2s+1)/s²
  4.     (2s+1)/(s+1)²
 Discuss Question
Answer: Option D. ->  (2s+1)/(s+1)²
Question 89. Differentiation of parabolic response is a -------------- response?
  1.     ramp
  2.     step
  3.     parabolic
  4.     impulse
 Discuss Question
Answer: Option A. ->  ramp
Question 90. Weighting function is in terms of -----------------
  1.     Laplace transform of the step response
  2.     Laplace transform of the impulse response
  3.     Laplace transform of the parabolic response
  4.     Laplace transform of the ramp response
 Discuss Question
Answer: Option B. ->  Laplace transform of the impulse response

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