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Control Systems

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

 1/(s-5).
 e5s.
 e-5s.
 1/(s+5).

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Control Systems
A second order under damped system has damping ratio of 0.3. Find the phase margin of the system?

 20°
 30°
 60°
 3°

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Control Systems
The optimum values of damping ratio is --------------

 0.3 to 0.7
 0.9 to 1.1
 0 to 2
 0.3 to 5

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Control Systems
When the polynomial is Routh Hurwitz,

 none of these.
 the function is not real.
 all zeroes lie in the right half of the s-plane.
 the roots of function have real parts which are to be zero/negative.

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Control Systems
In signal flow graph output node is node having only------------

 both 1 and 2
 incoming branches
 outgoing branches
None of these

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Control Systems
In signal flow graph input node is node having only------------

 both 1 and 2.
None of these
 outgoing branches.
 incoming branches.

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