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Control Systems

Control Systems
The Laplace transform of a transportation lag of 5 seconds is

 1/(s+5).
 e-5s.
 1/(s-5).
 e5s.

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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

 0.49.
 0.35.
 0.25.
 0.16.

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Control Systems
Sparking between the contacts can be reduced by inserting

 a resistor in the line.
 a reactor in the line.
 a capacitor in series with the contacts.
  a capacitor in parallel with the contacts.

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Control Systems
Weighting function is in terms of -----------------

 Laplace transform of the ramp response
 Laplace transform of the parabolic response
 Laplace transform of the impulse response
 Laplace transform of the step response

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Control Systems
Time response for a second order control system depends on value of ξ. If ξ>1 then the system is called as

 over damped system.
 critically damped system.
 undamped system .
 under damped system.

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Control Systems
Resonant peak of a marginally stable system is

 finite value
 infinite
 0
 any of the above

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