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Control Systems

Control Systems
The compensator would provide a maximum phase shift of

 20o.
 30o.
 45o.
 60o.

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Control Systems
In a control system, an integrator is represented by

  s.
 1 / s2.
  1 / s.
  s2.

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Control Systems
The transfer function of a system is given as below, if a = 0.1, then the steady state error to unity ramp input will be

 0.25.
 0.16.
 0.49.
 0.35.

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Control Systems
Number of sign changes in the entries in 1st column of Routh array denotes the no. of

 open loop zeroes in RHP.
 open loop poles in RHP.
 zeroes of system in RHP.
 roots of characteristic polynomial in RHP.

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Control Systems
Which of the following is/are the disadvantages of an open loop control system?

 Inaccurate.
 Unreliable.
None of these
 both 1 and 2.

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Control Systems
The unit step response of the system is 1 - e-t(1+t). Which is the system?

 unstable
 stable
 oscillatory
 critically stable

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