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Chemical Engineering :: Mass Transfer

Mass Transfer - Section 1
Mass Transfer - Section 2
Mass Transfer - Section 3
Mass Transfer - Section 4
Mass Transfer - Section 5
Mass Transfer - Section 6
Mass Transfer - Section 7
Mass Transfer - Section 8
Mass Transfer - Section 9
Mass Transfer - Section 10
Mass Transfer - Section 11
Mass Transfer - Section 12
Mass Transfer - Section 13
Mass Transfer - Section 14

  1. If the overall efficiency and Murphree plate efficiency are equal, then both the equilibrium and operating lines are

    2. A.
    straight
    B.
    parallel
    C.
    both (a) & (b)
    D.
    neither (a) nor (b)

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  2. Which of the following operations does not involve leaching ?

    3. A.
    Dissolving gold from ores.
    B.
    Dissolving pharmaceutical products from bark or roots.
    C.
    Dissolving sugar from the cells of the beet.
    D.
    Removing nicotine from its water solution by kerosene.

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  3. The recovery of pencillin from the acidified fermentation broth is done by

    4. A.
    distillation
    B.
    evaporation
    C.
    absorption
    D.
    liquid extraction

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  4. Unit operation involved in the prilling of urea is

    5. A.
    evaporation
    B.
    drying
    C.
    crystallisation
    D.
    both (b) and (c)

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  5. Molecular seives are porous

    6. A.
    alumina.
    B.
    silica.
    C.
    synthetic zeolites crystals/metal alumino-silicates.
    D.
    none of these.

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  6. Calcium ammonium nitrate (a fertiliser) is dried in a __________ dryer.

    7. A.
    rotary
    B.
    vacuum
    C.
    tunnel
    D.
    tray

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  7. A binary mixture of benzene and cyclohexane is separated by

    8. A.
    flash vaporisation
    B.
    extractive distillation
    C.
    solvent extraction
    D.
    ordinary distillation

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  8. Component A is diffusing in a medium B. The flux NA relative to a stationary point is equal to the flux due to molecular difusion, if

    9. A.
    mass transfer is accompanied by reaction.
    B.
    diffusion of A is in stagnant medium B.
    C.
    molecular mean free path is high.
    D.
    there is equimolar counter diffusion.

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  9. Cox chart is useful in the design of

    10. A.
    distillation column
    B.
    evaporator
    C.
    dryer
    D.
    crystalliser

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  10. Dew point of an air-water vapor mixture

    11. A.
    decreases with decrease in pressure.
    B.
    at constant humidity & total pressure is fixed.
    C.
    corresponding to any point on the humidity chart is obtained by projecting a line through this point parallel to the temperature axis and to the saturation curve.
    D.
    all 'a', 'b' & 'c'.

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