Home / Chemical Engineering / Process Control and Instrumentation :: Section 7

Chemical Engineering :: Process Control and Instrumentation

  1. For two non-interacting first order systems connected in series, the overall transfer function is the __________ of the individual transfer functions.

  2. A.
    product
    B.
    ratio
    C.
    sum
    D.
    difference

  3. Ordinary mercury in glass thermometer is used for measuring temperature upto 120°C. However, for measuring higher temperature upto __________ °C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury.

  4. A.
    250
    B.
    350
    C.
    550
    D.
    700

  5. Mercury thermometer is commonly used for low temperature measruement. The freezing point and boiling point of mercury are respectively __________ °C.

  6. A.
    - 39 and 350
    B.
    - 51 and 439
    C.
    - 79 and 395
    D.
    - 10 and 425

  7. Which of the following thermocouples has the least temperature measurement range?

  8. A.
    Copper-constantan
    B.
    Chromel-alumel
    C.
    Platinum-platinum/rhodium
    D.
    Iron-constantan

  9. Composition of natural gas is determined by the

  10. A.
    Haldane apparatus
    B.
    mass spectrometer
    C.
    chromatograph
    D.
    both (b) and (c)