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Control Systems

Control Systems
The error of a system to a ramp input is 1/5, if the type of the system is decreased by one, then the error of unit step input is

 5
 6/5
 0.2
 0.167

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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

 0.
 3.
 2.
 4.

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Control Systems
The unit step response of the system is 1 - e-t(1+t). Which is the system?

 stable
 unstable
 critically stable
 oscillatory

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Control Systems
Consider the following statements for phase lead compensation:

 both 1 and 2
 The maximum phase lag occurs at the arithmetic mean of the two corner frequencies.
 nether 1 nor 2
 Phase lead compensation shifts the gain crossover frequency to the right

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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?

 2(A+B)
 A+B
 A/B
 A*B

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Control Systems
The characteristic equation of a feedback control system is given by s³ + 5s² + (k + 6)s + k = 0. In the root loci diagram, the asymptotes of the root loci for large 'k' meet at a point in the s-plane whose coordinates are

 (-1,0)
 (-2,0)
 (2,0)
 (1,0)

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