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EEE :: Electrical Control Systems

  1. In a system low friction coefficient facilitates

  2. A.

     Reduced velocity lag error

    B.

     Increased velocity lag error

    C.

     Increased speed of response

    D.

     Reduced time constant of the system


  3. As a result of introduction of negative feedback which of the following will not decrease?

  4. A.

     Band width

    B.

     Overall gain

    C.

     Distortion

    D.

     Instability


  5. an be extended to systems which are time-varying ?

  6. A.

     Bode-Nyquist stability methods

    B.

     Transfer functions

    C.

     Root locus design

    D.

     State model representatives


  7. The term backlash is associated with

  8. A.

     servomotors

    B.

     induction relays

    C.

     gear trains

    D.

     any of the above


  9. A closed loop system is distinguished from open loop system by which of the following ?

  10. A.

     Servomechanism

    B.

     Feedback

    C.

     Output pattern

    D.

     Input pattern


  11. Transfer function of a system is used to calculate which of the following ?

  12. A.

     The order of the system

    B.

     The time constant

    C.

     The output for any given input

    D.

     The steady state gain


  13. The second derivative input signals modify which of the following ?

  14. A.

     The time constant of the system

    B.

     Damping of the system

    C.

     The gain of the system

    D.

     The time constant and suppress the oscillations

    E.

     None of the above


  15. In a stable control system backlash can cause which of the following ?

  16. A.

     Underdamping

    B.

     Overdamping

    C.

     Poor stability at reduced values of open loop gain

    D.

     Low-level oscillations


  17. The transfer function is applicable to which of the following ?

  18. A.

     Linear and time-in variant systems

    B.

     Linear and time-variant systems

    C.

     Linear systems

    D.

     Non-linear systems

    E.

     None of the above


  19. Phase margin of a system is used to specify which of the following ?

  20. A.

     Frequency response

    B.

     Absolute stability

    C.

     Relative stability

    D.

     Time response