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Control Systems

Control Systems
Force balancing equation of a dash-pot element is (where, x = displacement)

 B d2x/dt2
 B *x
 B dx/dt
None of these

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

 1/(s-5).
 e-5s.
 e5s.
 1/(s+5).

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Control Systems
Find the angles of asymptotes of the open loop transfer function G(s) = k(s + 1)/((s(s+2)(s+4)?

 0°, 180°
 90°,180°
 90°,270°
 60°,240°

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Control Systems
The position and velocity error coefficient for the transfer function given below are respectively

 0 and 0.
 0 and infinity.
 50 and infinity.
 50 and 0.

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Control Systems
The transfer function of phase lead compensator is given by , where, T > 0, α < 0. What is the maximum phase shift provided by this compensator?

 sin-1((1 - α)/(1 + α)
 both 1 and 3
 tan-1((1 - α)/(2√α)
 cos-1((1 - α)/(1 + α)

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Control Systems
Which system is also known as automatic control system?

 Either 1 or 2
 Closed loop control system
 Open loop control system
 Nether 1 nor 2

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