Home / Chemical Engineering / Process Control and Instrumentation :: Section 4

Chemical Engineering :: Process Control and Instrumentation

  1. The transfer function of a second order system is

  2. A.
    B.
    C.
    D.
    none of these

    View Answer

    Workspace

    Discuss Discuss in Forum


  3. Bode diagram are generated from output response of the system subjected to which of the following input?

  4. A.
    Impulse
    B.
    Step
    C.
    Ramp
    D.
    Sinusoidal

    View Answer

    Workspace

    Discuss Discuss in Forum


  5. Which of the following thermocouples is the most suitable for measuring a temperature of about 1600°C in an oxidizing atmosphere ?

  6. A.
    Platinum-platinum + rhodium
    B.
    Iron-constantan
    C.
    Copper-constantan
    D.
    Chromel-alumel

    View Answer

    Workspace

    Discuss Discuss in Forum


  7. Mercury thermometer can be used to measure the temperature upto __________ °C.

  8. A.
    100
    B.
    250
    C.
    350
    D.
    750

    View Answer

    Workspace

    Discuss Discuss in Forum


  9. The transfer function of a process is . If a step change is introduced into the system, then the response will be

  10. A.
    under damped
    B.
    critically damped
    C.
    over damped
    D.
    none of these

    View Answer

    Workspace

    Discuss Discuss in Forum


  11. Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by

  12. A.
    making the volume of thermometer bulb as large as conveniently possible.
    B.
    reducing the volume of the capillary to a minimum.
    C.
    reducing the volume of the receiving element to a minimum.
    D.
    all 'a', 'b' & 'c'.

    View Answer

    Workspace

    Discuss Discuss in Forum


  13. Which of the following is not a differential pressure flow meter ?

  14. A.
    Rotameter
    B.
    Flow nozzle
    C.
    Orificemeter
    D.
    Venturimeter

    View Answer

    Workspace

    Discuss Discuss in Forum


  15. Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change ?

  16. A.
    Water
    B.
    Mercury
    C.
    Methyl alcohal
    D.
    Carbon-tetrachloride

    View Answer

    Workspace

    Discuss Discuss in Forum


  17. Bourdon gauges are used for measuring pressure (kg/cm2 )

  18. A.
    < atmospheric
    B.
    > 2 (gauge)
    C.
    < 2 (gauge)
    D.
    > 10 (absolute)

    View Answer

    Workspace

    Discuss Discuss in Forum


  19. A photo electric device in which the resistance of the metal is directly proportional to the light striking on it, is known as photo-conductive cell. Photoelectric transducers are used for the measurement of those parameters, which can be used to produce variation in

  20. A.
    light intensity
    B.
    current
    C.
    flux density
    D.
    voltage

    View Answer

    Workspace

    Discuss Discuss in Forum