Q. If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm.

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Q. During dehumidification of unsaturated air wet bulb temperature & partial pressure of vapor are not constant. However, during evaporative cooling process with recirculated water supply, the __________ remains constant.

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Q. In case of absorption, both the operating and equilibrium lines will be straight for

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Q. Mass transfer co-efficient varies as Dᴀʙ^0.5, according to the __________ theory.

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Q. For an absorber, both equilibrium and operating line will be straight for

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Q. Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and

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Q. Humid volume, at a given temperature is a/an __________ function of humidity.

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Q. The Schmidt number which is defined as, μ/ρ D, is the ratio of the

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Q. If f is defined as above, then which of the following applies to a feed at dew point ?

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Q. The falling rate period in the drying of a solid is characterised by

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Q. In which of the following unit operations, the selectivity is an important parameter ?

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Q. Which of the following is an undesirable characteristic for the solvent used in gas absorption ?

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Q. Which of the following equipments is not used for liquid dispersion ?

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Q. __________ number indicates the ratio of the rates of the heat and mass transfer incase of a cooling tower.

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Q. The expression, y(1 - x)/x(1 - y) is for

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Q. In physical terms, Schmidt number means

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Q. In case of liquids, the binary diffusivity is proportional to (where, T = temperature)

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Q. The diffusivity, Dᴀʙ (for component A diffusing in B) is equal to the diffusivity Dʙᴀ (for component B diffusing in A) for a binary mixture of

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Q. When both the fluids flow concurrently in an absorber, the slope of the operating line is

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Q. The percentage humidity is less than the relative humidity only at __________ percent humidity.

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