Stability Analysis MCQ

Test your knowledge with important Stability Analysis MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Stability Analysis MCQs at Bissoy

• Assertion (A): A linear, negative feedback control system is invariable stable if its open loop configuration is stable Reason (R): the negative feedback reduces the overall gain of the feedback.
  ক

  Both A and R are true and R is correct explanation of A

  খ

  Both A and R are true and R is not correct Explanation of A

  গ

  A is True and R is false

  ঘ

  A is False and R is true
• The characteristic equation of a control system is given by s6+2s5+8s4+12s3+20s2+16s+16=0 . The number of the roots of the equation which lie on the imaginary axis of s-plane:
  ক

  0

  খ

  2

  গ

  4

  ঘ

  6
• Which of the following techniques is utilized to determine at the actual point at which the root locus crosses the imaginary axis?
  ক

  Nyquist technique

  খ

  Routh-Hurwitz technique

  গ

  Nichol’s technique

  ঘ

  Bode technique
• The given characteristic equation s4+s3+2s2+2s+3=0 has:
  ক

  Zero root in the s-plane

  খ

  One root in the RHS of s-plane

  গ

  Two root in the RHS of s-plane

  ঘ

  Three root in the RHS of s-plane
• Consider the following statements: Routh-Hurwitz criterion gives: 1. Absolute stability 2. The number of roots lying on the right half of the s-plane 3. The gain margin and the phase margin
  ক

  1,2 and3

  খ

  1 and 2

  গ

  2 and 3

  ঘ

  1 and 3
• The following characteristic equation results in stable operation of the feedback system s3+4s2+10s+11=0
  ক

  True

  খ

  False
• The Routh-Hurwitz criterion cannot be applied when the characteristic equation of the system contains any coefficients which is :
  ক

  Negative real and exponential function

  খ

  Negative real, both exponential and sinusoidal function of s

  গ

  Both exponential and sinusoidal function of s

  ঘ

  Complex, both exponential and sinusoidal function of s
• Consider the following statements:
  ক

  The effect of feedback is to reduce the system error

  খ

  Feedback increases the gain of the system in one frequency range but decreases in the other

  গ

  Feedback can cause a system originally stable to become unstable

  ঘ

  Both a and c
• Assertion (A): Feedback control system offer more accurate control over open-loop systems. Reason (R): The feedback path establishes a link for input and output comparison and subsequent error correction.
  ক

  Both A and R are true and R is correct explanation of A

  খ

  Both A and R are true and R is not correct Explanation of A

  গ

  A is True and R is false

  ঘ

  A is False and R is true
• First column elements of the Routh’s tabulation are 3, 5, -3/4, ½, 2. It means that there are:
  ক

  Is one root in the left half of s-plane

  খ

  Are two roots in the left half of s-plane

  গ

  Are two roots in the right half of the s-plane

  ঘ

  Is one root in the right half of s-plane