Control Systems MCQs with answers Page - 35

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Q. If the gain of the system is reduced to a zero value, the roots of the system in the s- plane,

  • (A) coincide with zero
  • (B) move away from zero
  • (C) move away from poles
  • (D) coincide with the poles

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Q. The addition of open loop zero pulls the root loci towards:

  • (A) the left and therefore system becomes more stable
  • (B) the right and therefore system becomes unstable
  • (C) imaginary axis and therefore system becomes marginally stable
  • (D) the left and therefore system becomes unstable

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Q. If root loci plots of a particular control system do not intersect the imaginary axis at any point, then the gain margin of the system will be:

  • (A) 0
  • (B) 0.707
  • (C) 1
  • (D) infinite

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Q. When the number of poles is equal to the number of zeroes, how many branches of root locus tends towards infinity?

  • (A) 1
  • (B) 2
  • (C) 0
  • (D) equal to number of zeroes

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Q. If the roots of the have negative real parts then the response is

  • (A) stable
  • (B) unstable
  • (C) marginally stable
  • (D) bounded

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Q. According to the property of state transition method, e0 is equal to

  • (A) i
  • (B) a
  • (C) e-at
  • (D) -eat

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Q. State model representation is possible using

  • (A) physical variables
  • (B) phase variables
  • (C) canonical state variables
  • (D) all of the mentioned

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Q. State space analysis is applicable even if the initial conditions are

  • (A) zero
  • (B) non-zero
  • (C) equal
  • (D) not equal

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Q. Conventional control theory is applicable to systems

  • (A) siso
  • (B) mimo
  • (C) time varying
  • (D) non-linear

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Q. Insertion of negative feedback in control system affects:

  • (A) the transient response to vanish uniformly
  • (B) the transient response to decay very fast
  • (C) no change in transient response
  • (D) the transient response decays at slow rate

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