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Control Systems

Control Systems
Consider a network function H(s) = 2(s+3)/{(s+2)(s+4)}. What is the steady state response due to step input?

 4/3
 3/4
 1
 1/2

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Control Systems
The impulse response of a system is c(t) = -te-t + 2 e-t (t>0). Its open loop transfer function is

 (2s+2)/s²
 (2s+2)/(s+1)²
 (2s+1)/(s+1)²
 (2s+1)/s²

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Control Systems
None of the poles of a linear control system lie in the right half of s plane. For a bounded input, the output of this system

  none of these.
  tends to zero.
  could be unbounded.
  always bounded.

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Control Systems
The error of a system to a ramp input is 1/5, if the type of the system is decreased by one, then the error of unit step input is

 5
 0.2
 0.167
 6/5

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Control Systems
The initial slope of Bode plot for a transfer function having no poles at the origin is

 0 dB/decade
 -10dB/decade.
 -20dB/decade.
 +10dB/decade.

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Control Systems
The open loop transfer function of a unity feedback control system is given by G(s) = k/s(s+1). If the gain k is increased to infinity, then damping ratio will tend to become

 unity
 zero
 infinite
 0.707

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