Home / Chemical Engineering / Process Control and Instrumentation :: Section 5

Chemical Engineering :: Process Control and Instrumentation

  1. In a shell and tube heat exchanger, the inlet temperature of heating/cooling fluid is the __________ variable.

  2. A.
    load
    B.
    manipulated
    C.
    controlled
    D.
    none of these

    View Answer

    Workspace

    Discuss Discuss in Forum


  3. Which of following error integral is considered as the best criterion in controller settings ?

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

    View Answer

    Workspace

    Discuss Discuss in Forum


  5. Polarisation of light forms the working principle of a

  6. A.
    polarimeter
    B.
    polarograph
    C.
    chromatograph
    D.
    spectrometer

    View Answer

    Workspace

    Discuss Discuss in Forum


  7. A bimetallic thermometer as compared to industrial mercury in glass thermometer has almost the same

  8. A.
    temperature measuring range (- 40°C to 450°C).
    B.
    accuracy (± 1% of span).
    C.
    speed of response.
    D.
    all a, b & c.

    View Answer

    Workspace

    Discuss Discuss in Forum


  9. Thermal wells used in temperature measurements should have

  10. A.
    very thick walls.
    B.
    low emissivity.
    C.
    polished surface.
    D.
    high transmissivity of radiation.

    View Answer

    Workspace

    Discuss Discuss in Forum


  11. Which of the following flow-metering instru-ments is an areameter ?

  12. A.
    Venturimeter
    B.
    Rotameter
    C.
    Pitot tube
    D.
    Hot wire anemometer

    View Answer

    Workspace

    Discuss Discuss in Forum


  13. Out of the following themocouple wire insulating material, the highest temperature rating is for

  14. A.
    teflon
    B.
    ceramic fibre
    C.
    asbestos
    D.
    fibre glass

    View Answer

    Workspace

    Discuss Discuss in Forum


  15. Which is the most suitable instrument for measuring pressure below 3 microns ?

  16. A.
    Mcleoid gauge
    B.
    Alphatron
    C.
    Ionisation gauge
    D.
    Bourdon guage

    View Answer

    Workspace

    Discuss Discuss in Forum


  17. Routh stability method uses __________ loop transfer function.

  18. A.
    open
    B.
    closed
    C.
    either (a) or (b)
    D.
    neither (a) nor (b)

    View Answer

    Workspace

    Discuss Discuss in Forum