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Control Systems

Control Systems
Advantages of open loop control system is/are

 simple and economical.
All of these
 accurate.
 reliable.

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Control Systems
Transient state analysis depends on which of the following?

 type of system
 order of system
 both 1 and 2
 nether 1 nor 2

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Control Systems
Find the stability for the following transfer function G(s) = 50/s(s+5) ?

 Unstable
 Critically stable
 Marginally stable
 Stable

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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)
 (1,0)
 (2,0)
 (-2,0)

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Control Systems
A system is stable for (where GM = Gain Margin and PM = Phase Margin):

 GM and PM both +ve.
 GM -ve.
 GM and PM both -ve.
 PM - ve.

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Control Systems
Consider the following statements for phase lead compensation:

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

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