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Control Systems

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

 1/(s-5).
 1/(s+5).
 e-5s.
 e5s.

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

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

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Control Systems
If two blocks having gains A and B respectively are in parallel connection, find the resultant gain using block diagram reduction technique?

 A+B
 2(A+B)
 A*B
 A/B

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Control Systems
Time taken by the response to reach and stay within a specified error is called

 Raise time.
 Peak time.
 Peak overshoot.
 Settling time.

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Control Systems
Which of the following statements is/are true?

 nether 1 nor 2
 Centroid may be a part of root locus
 Centroid may not be a part of root locus
 both 1 and 2

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Control Systems
What is the order of a closed loop control system for a plant with a transfer function equal to G(s) = k/s²(1+Ts) and with unity feedback

 2
 0
 1
 3

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