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Control Systems

Control Systems
A open loop transfer function is given as G(s) = (s+2)/(s+1)(s-1). Find the number of encirclements about '-1+j0'?

 3
 0
 1
 2

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Control Systems
Sparking between the contacts can be reduced by inserting

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

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Control Systems
For the polynomial , number of roots which lie in the right half of s-plane is

 2
 1
 4
 3

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Control Systems
Settling time for 5% tolerance band is -------------

 5T.
 2T.
 3T.
 4T.

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

  s.
  1 / s.
 1 / s2.
  s2.

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Control Systems
The position and velocity error coefficient for the transfer function given below are respectively

 0 and infinity.
 50 and infinity.
 50 and 0.
 0 and 0.

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