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Control Systems
The output of the system has an effect upon the input quantity, then the system is a
closed loop control system.
either 1 or 2.
None of these
open loop control system.
closed loop control system.
either 1 or 2.
None of these
open loop control system.
Answer
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Control Systems
The characteristic equation of a feedback control is 2s4 + s3 + 3s2 + 5s + 10 = 0. The no of roots in the right half of the s-plane is
4.
2.
3.
0.
4.
2.
3.
0.
Answer
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Control Systems
Find the Laplace transform for sinωt?
1/s²
s/(s²+ω²)
1/s
ω/(s²+ω²)
1/s²
s/(s²+ω²)
1/s
ω/(s²+ω²)
Answer
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Control Systems
Two identical first order systems have been cascaded non interactively. The unit step response of the systems will be
Over damped
under damped
un damped
critical damped
Over damped
under damped
un damped
critical damped
Answer
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Control Systems
The transfer function of a phase lead compensator is given by: G(s) = (1 + 3Ts)/(1 + Ts) where T>0. What is the maximum phase shift provided by such a compensator?
45°
30°
90°
60°
45°
30°
90°
60°
Answer
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Control Systems
In polar plots if the critical point '-1+j0' is enclosed then the system is --------
marginally stable
stable
critical stable
unstable
marginally stable
stable
critical stable
unstable
Answer
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