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EEE :: Electrical Control Systems

  1. Which of the following is the definition of proportional band of a controller ?

  2. A.

     The range of air output as measured variable varies from maximum to minimum

    B.

     The range of measured variables from set value

    C.

     The range of measured variables through which the air output changes from maximum to minimum

    D.

     Any of the above

    E.

     None of the above


  3. has tendency to oscillate.

  4. A.

     Open loop system

    B.

     Closed loop system

    C.

     Both (A) and (B)

    D.

     Neither (A) nor (B)


  5. An amplidyne can give which of the following characteristics ?

  6. A.

     Constant current

    B.

     Constant voltage

    C.

     Constant current as well as constant voltage

    D.

     Constant current, constant voltage and constant power

    E.

     None of the above


  7. In a control system the output of the controller is given to

  8. A.

     Final control element

    B.

     Amplifier

    C.

     Comparator

    D.

     Sensor


  9. technique is not applicable to nonlinear system ?

  10. A.

     Nyquist Criterion

    B.

     Quasi linearization

    C.

     Functional analysis

    D.

     Phase-plane representation


  11. A phase lag lead network introduces in the output

  12. A.

     lag at all frequencies

    B.

     lag at high frequencies and lead at low frequencies

    C.

     lag at low frequencies and lead at high frequencies

    D.

     none of the above


  13. The capacitance, in force-current analogy, is analogous to

  14. A.

     momentum

    B.

     velocity

    C.

     displacement

    D.

     mass


  15. The viscous friction co-efficient, in force-voltage analogy, is analogous to

  16. A.

     charge

    B.

     resistance

    C.

     reciprocal of inductance

    D.

     reciprocal of conductance

    E.

     none of the above


  17. Mass, in force-voltage analogy, is analogous to

  18. A.

     charge

    B.

     current

    C.

     inductance

    D.

     resistance


  19. A differentiator is usually not a part of a control system because it

  20. A.

     reduces damping

    B.

     reduces the gain margin

    C.

     increases input noise

    D.

     increases error