Q. In case of cooling towers, the ratio of the rates of heat and mass transfer is indicated by the __________ number.

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Q. Which one of the following devices is not used for both the absorption as well as the liquid-liquid extraction processes ?

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Q. The temperature of water cooled in cooling tower is always __________ temperature of entering air.

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Q. Which of the following processes is followed by unsaturated air (with dry bulb temperature 12°C and relative humidity 47%) passing through water spray washer (temperature of water being constant at 40°C?

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Q. Mass transfer co-efficient is directly proportional to Dᴀʙ according to the __________ theory.

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Q. Ammonia present in the coke oven gas is removed by washing with

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Q. With increase in temperature, the leaching rate increases due to

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Q. Which of the following processes is not an example of adsorption applied to gaseous separations ?

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Q. The critical moisture content in case of drying indicates the __________ rate period.

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Q. Pick out the wrong statement

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Q. Out of two equilibrium curves, first one lies above the diagonal and the second lies below the diagonal in the x-y plot. It means that separation by distillation is

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Q. 'ADDUCTS' and 'CLATHRATES' are used in case of

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Q. Adsorption is an unit operation which generally involves __________ systems.

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Q. In case of __________ distillation, a solvent is added to alter the relative volatility of the mixture to be separated.

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Q. Separation of the isotopes of helium for scientific investigations is done by

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Q. Extraction of coffee from its seed is done by

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Q. In azeotropic mixture, the equilibrium vapour composition is

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Q. With lapse of time, the overhead composition of light component in case of batch distillation with constant reflux

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Q. Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of

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Q. According to the film theory of mass transfer, the mass transfer co-efficient is proportional to (where, D = molecular diffusivity)

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