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ECE :: Automatic Control Systems

Automatic Control Systems - Section 1
Automatic Control Systems - Section 2
Automatic Control Systems - Section 3
Automatic Control Systems - Section 4
Automatic Control Systems - Section 5
Automatic Control Systems - Section 6
Automatic Control Systems - Section 7
Automatic Control Systems - Section 8
Automatic Control Systems - Section 9
Automatic Control Systems - Section 10
Automatic Control Systems - section-11

  1. The phase angle curve of G(jω) H(jω) can be drawn

    2. A.
    by adding the phase angle curves of individual factors
    B.
    by subtracting the phase angle curves of individual factors
    C.
    by multiplying the phase angle curves of individual factors
    D.
    by dividing the phase angle curves of individual factors

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  2. The most commonly used devices for differencing and amplification, in control systems, are

    3. A.
    BJT amplifiers
    B.
    FET amplifiers
    C.
    operational amplifiers
    D.
    either (a) or (b)

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  3. For the system in the given figure, the ratio C(s)/R(s) =

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  4. In Bode method of stability analysis, the error curve is not symmetric about corner frequency.

    5. A.
    True
    B.
    False

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  5. The transfer function can be for

    6. A.
    lead compensator
    B.
    lag compensator
    C.
    both (a) and (b)
    D.
    either (a) or (b)

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  6. For the feedback system with closed loop transfer function the settling time for 2% tolerance

    7. A.
    B.
    C.
    D.
    4ξωn

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  7. In a second order system with a unit step input, the speed of response is high if system is

    8. A.
    overdamped
    B.
    undamped system
    C.
    critically damped
    D.
    underdamped

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  8. A thermometer requires 1 minute to indicate 98% of its final response to a step input. If it is a first order system the time constant is

    9. A.
    1 minute
    B.
    0.5 minute
    C.
    0.25 minute
    D.
    0.1 minute

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  9. Assertion (A): A slight change in pole-zero configuration can cause only minor changes in root locus configuration.

    Reason (R): Asymptotes show the behaviour of root loci for |s| >> 1

    10. A.
    Both A and R are correct and R is correct explanation of A
    B.
    Both A and R are correct but R is not correct explanation of A
    C.
    A is correct but R is wrong
    D.
    R is correct but A is wrong

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  10. In a second order system ωn = 10 rad/sec and ζ = 0.1, then ωd =

    11. A.
    9.1 rad/sec
    B.
    9.95 rad/sec
    C.
    9 rad/sec
    D.
    1 rad/sec

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