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EEE :: Electrical Control Systems

  1. Which of the following statements is correct for any closed loop system ?

  2. A.

     All the co-efficients can have zero value

    B.

     All the co-efficients are always non-zero

    C.

     Only one of the static error co-efficients has a finite non-zero value

    D.

     None of the above


  3. In a system zero initial condition means that

  4. A.

     The system is at rest and no energy is stored in any of its components

    B.

     The system is working with zero stored energy

    C.

     The system is working with zero reference signal

    D.

     None of the above


  5. Any externally introduced signal affecting the controlled output is called a

  6. A.

     feedback

    B.

     stimulus

    C.

     signal

    D.

     gain control


  7. Technique gives quick transient and stability response

  8. A.

     Root locus

    B.

     Bode

    C.

     Nyquist

    D.

     Nichols


  9. A control system in which the control action is somehow dependent on the output is known as

  10. A.

     Closed loop system

    B.

     Semiclosed loop system

    C.

     Open system

    D.

     None of the above


  11. Increases the steady state accuracy.

  12. A.

     Integrator

    B.

     Differentiator

    C.

     Phase lead compensator

    D.

     Phase lag compensator


  13. If the gain of the critical damped system is increased it will behave as

  14. A.

     oscillatory

    B.

     critically damped

    C.

     overdamped

    D.

     underdamped

    E.

     none of the above


  15. In an automatic control system which of the following elements is not used ?

  16. A.

     Error detector

    B.

     Final control element

    C.

     Sensor

    D.

     Oscillator


  17. A car is raining at a constant speed of 50 km/h, which of the following is the feedback element for the driver ?

  18. A.

     Clutch

    B.

     Eyes

    C.

     Needle of the speedometer

    D.

     Steering wheel

    E.

     None of the above


  19. Which of the following can be measured by the use of a tachogenerator ?

  20. A.

     Acceleration

    B.

     Speed

    C.

     Speed and acceleration

    D.

     Displacement

    E.

     None of the above