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Chemical Engineering :: Process Control and Instrumentation

  1. A non-linear chemical system is exemplified by a/an

  2. A.
    isothermal CSTR
    B.
    mixer
    C.
    non-isothermal CSTR
    D.
    none of these

  3. The transfer function for an ideal proportional plus reset controller (reset time T) is

  4. A.
    B.
    Kc(1 + TS)
    C.
    D.

  5. The frequency response of a first order system, has a phase shift with lower and upper bounds given by

  6. A.
    - ∞, π/2
    B.
    -π/2, π/2
    C.
    -π/2, 0
    D.
    0, π/2

  7. Gas chromatography is used for the measurement of

  8. A.
    temperature
    B.
    pressure
    C.
    concentration
    D.
    flow rate

  9. Which of the following thermocouples can measure the maximum temperature ?

  10. A.
    Platinum-rhodium
    B.
    Tungsten-molybdenum
    C.
    Chromel-alumel
    D.
    Iron-constantan

  11. Radiation pyrometers as compared to thermocouples

  12. A.
    has a slower speed of response.
    B.
    can measure higher temperature.
    C.
    can't measure the temperature of moving objects.
    D.
    is more affected by corrosive atmosphere.

  13. Liquid flow rate in a small channel is best measured by a/an

  14. A.
    weir
    B.
    pitot tube
    C.
    vane meter
    D.
    venturimeter

  15. Specific gravity of a liquid can not be measured by a/an

  16. A.
    anemometer
    B.
    specific gravity bottle
    C.
    pycnometer
    D.
    hydrometer

  17. __________ temperature scale assigns 0° to the 'ice point' and 80° to the 'steam point'.

  18. A.
    Celcius
    B.
    Rankine
    C.
    Reumur
    D.
    Farenhite

  19. Dead zone is the

  20. A.
    same as time constant.
    B.
    same as transportation lag.
    C.
    maximum change in the variable that does not change the reading of the instrument.
    D.
    none of these.