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Control Systems

Control Systems
For a unity feedback control system open loop transfer function then position error constant is

 0.
 40.
 20.
 infinity.

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Control Systems
For a unity feedback control system open loop transfer function then acceleration error constant is

 20.
 50.
 infinity.
 0.

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Control Systems
When the polynomial is Routh Hurwitz,

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

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Control Systems
If the transfer function of a phase lead compensator is (s+a)/(s+b) and that of a lag compensator is (s+p)/(s+q), then which one of the following sets of conditions must be satisfied?

 a > b, p > q
 a < b, p < q
 a > b, p < q
 a < b, p >q

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Control Systems
Which of the following is/are the disadvantages of an open loop control system?

 Unreliable.
 Inaccurate.
None of these
 both 1 and 2.

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Control Systems
The impulse response of an initally relaxed linear system is e-2tu(t). To produce a response of te-2tu(t), the input must be equal to

 (0.5)e-2tu(t).
 e-2tu(t).
 e-tu(t).
 2e-tu(t).

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