Home / Chemical Engineering / Mass Transfer :: Section 7

Chemical Engineering :: Mass Transfer

  1. The value of L/mG ratio for economical absorption operation ranges from

  2. A.
    0.5 to 0.8
    B.
    0.8 to 1.2
    C.
    1.25 to 2.0
    D.
    2.5 to 3.5

  3. Large scale usage of flash distillation is practised in

  4. A.
    soap manufacturing
    B.
    ammonia synthesis plant
    C.
    polymerisation industry
    D.
    petroleum refinning

  5. High pressure at the bottom of a distillation tower handling heat sensitive materials results in

  6. A.
    thermal decomposition of bottoms.
    B.
    increased relative volatility.
    C.
    erosion of the tower.
    D.
    very efficient operation.

  7. Alcohol is dehydrated using __________ distillation.

  8. A.
    extractive
    B.
    azeotropic
    C.
    steam
    D.
    molecular

  9. Separation of two volatile liquids by distillation makes use of their

  10. A.
    selectivity
    B.
    relative volatility
    C.
    solubility
    D.
    density difference

  11. Which of the following increases during evaporative cooling process with recirculated water supply ?

  12. A.
    Wet bulb temperature
    B.
    Relative humidity
    C.
    Partial pressure of vapour
    D.
    Both (b) and (c)

  13. Dried finished product sampled from various parts of a __________ dryer exhibits non-uniformity in the moisture content.

  14. A.
    rotary
    B.
    tray
    C.
    freeze
    D.
    none of these