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EEE :: Electrical Control Systems

  1. Directly converts temperature into voltage.

  2. A.

     Thermocouple

    B.

     Potentiometer

    C.

     Gear train

    D.

     LVDT

    E.

     None of the above


  3. Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero ?

  4. A.

     The system is relatively stable

    B.

     The system is highly stable

    C.

     The system is highly oscillatory

    D.

     None of the above


  5. In pneumatic control systems the control valve used as final control element converts

  6. A.

     Pressure signal to electric signal

    B.

     Pressure signal to position change

    C.

     Electric signal to pressure signal

    D.

     Position change to pressure signal


  7. When the initial conditions of a system are specified to be zero it implies that the system is

  8. A.

     At rest without any energy stored in it

    B.

     Working normally with reference input

    C.

     Working normally with zero reference input

    D.

     At rest but stores energy


  9. In order to increase the damping of a badly underdamped system which of following compensators may be used ?

  10. A.

     Phase-lead

    B.

     Phase-lag

    C.

     Both (A) and (B)

    D.

     Either (A) and (B)

    E.

     None of the above


  11. Static error coefficients are used as a measure of the effectiveness of closed loop systems for specified ________ input signal.

  12. A.

     acceleration

    B.

     velocity

    C.

     position

    D.

     all of the above


  13. A.C. servomotor resembles

  14. A.

     two phase induction motor

    B.

     Three phase induction motor

    C.

     direct current series motor

    D.

     universal motor


  15. The temperature, under thermal and electrical system analogy, is considered analogous to

  16. A.

     voltage

    B.

     current

    C.

     capacitance

    D.

     charge

    E.

     none of the above


  17. In electrical pneumatic system analogy the current is considered analogous to

  18. A.

     velocity

    B.

     pressure

    C.

     air flow

    D.

     air flow rate


  19. In liquid level and electrical system analogy, voltage is considered analogous to

  20. A.

     head

    B.

     liquid flow

    C.

     liquid flow rate

    D.

     none of the above