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ECE :: Automatic Control Systems

  1. For the system in the given figure the characteristic equation is

  2. A.
    B.
    C.
    K(s + 1)(s + 3) = 0
    D.
    s(s + 2) = 0

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  3. Mechanical impedance is the ratio of

  4. A.
    rms force to rms velocity
    B.
    rms force to rms displacement
    C.
    rms velocity to rms displacement
    D.
    none of the above

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  5. For the system in the given figure. The transfer function C(s)/R(s) is

  6. A.
    G1 + G2 + 1
    B.
    G1 G2 + 1
    C.
    G1 G2 + G2 + 1
    D.
    G1 G2 + G1 + 1

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  7. Whether a linear system is stable or unstable that it

  8. A.
    is a property of the system only
    B.
    depends on the input function only
    C.
    both (a) and (b)
    D.
    either (a) or (b)

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  9. For the system of the given figure the transfer function =

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  11. In the given figure shows pole-zero plot. If steady state gain is 2 the transfer function G(s) is

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  13. If a system is to follow arbitrary inputs accurately the bandwidth should be

  14. A.
    large
    B.
    small
    C.
    very small
    D.
    neither small nor large

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  15. For the system of the given figure, the damping ratio of closed loop poles is

  16. A.
    1.5
    B.
    1
    C.
    0.5
    D.
    0.25

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  17. Assertion (A): Potentiometers can not be used as error detectors in position control systems.

    Reason (R): The resolution of a potentiometer places an upper limit on its accuracy

  18. 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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  19. For a first order system having transfer function , the unit impulse response is

  20. A.
    e-t/T
    B.
    T e-t/T
    C.
    D.
    T2 e-t/T

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