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Control Systems

Control Systems
The DC gain of a system represented by the transfer function 12 / {( s + 2 )( s + 3 )} is

 1.
 2.
 5.
 10.

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Control Systems
The characteristic equation of a control system is give by s(s + 4)(s² + 2s + 1) + k(s + 1) = 0. Find the angle between the asymptotes?

 180°
 360°
 60°
 120°

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Control Systems
In which of the following controller band width is increased?

 both 1 and 2
 proportional plus integral controller
 proportional plus derivative controller
 nether 1 nor 2

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Control Systems
The characteristic equation for closed loop system is given as . The value of k for which the system becomes just stable is

 6
 8
 4
 2

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Control Systems
A linear time invariant system has an impulse response e2t for t > 0 . If initial condition are 0 and input is e3t, the output for t > 0 is

  e2t + e3t.
  e5t.
  e3t - e2t.
  e2t - e3t.

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Control Systems
Which of the following are the disadvantages of a closed loop control system?

 Complex and costly.
 Reduces the overall gain.
All of these
 Oscillatory response.

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