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Control Systems

Control Systems
A ramp input applied to an unity feedback system results in 5% steady state error. The type number of the system is...........?

 1
 3
 5
 2

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Control Systems
Accurate and reliable output is possible with which of the following system?

 Closed loop control system
None of these
 Both 1 and 2
 Open loop control system

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Control Systems
The characteristic equation for closed loop system is given as . The value of k for which the system becomes just stable is

 8
 6
 2
 4

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Control Systems
The open loop transfer function of a unity feedback control system is given by G(s) = k/s(s+1). If the gain k is increased to infinity, then damping ratio will tend to become

 zero
 infinite
 unity
 0.707

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Control Systems
Resonant peak of a marginally stable system is

 infinite
 any of the above
 finite value
 0

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Control Systems
The transfer function of a plant is T(s) = 5/(s+5)(s² + 5 + 1). The second order approximation of T(s) using dominant pole concept is

 5/(s² + 5 + 1)
 1/(s² + 5 + 1)
 5/(s+1)(s+5)
 1/(s+1)(s+5)

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