Chemical Engineering · all questions

Mass Transfer
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Q161

Surface renewal model of mass transfer was enunciated by

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Q162

At the boiling point of the liquid at the prevailing pressure, the saturated absolute humidity becomes

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Q163

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

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Q164

The diffusivity (D) in a binary gas mixture is related to the temperature (T) as

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Q165

In an operating distillation column, the

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Q166

If G = insoluble gas in gas stream and L = non-volatile solvent in liquid stream, then the slope of the operating line for the absorber is

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Q167

Pick out the correct statement.

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Q168

__________ diffusion is used for separating the isotopes of methane.

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Q169

McCabe-Thiele method of binary distillation does not assume that the

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Q170

Which of the following parameters remains almost constant during adiabatic saturation of unsaturated air?

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Q171

Equilibrium moisture of a solid is equal to the total moisture minus free moisture. Which of the following substances will have maximum equilibrium moisture?

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Q172

Entrainer used in azeotropic distillation should

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Q173

\frac{N _{Sc}}{N _{Pr}}

is called the

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Q174

The humid volume may be increased by increasing the

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Q175

Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the

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Q176

Use of raschig rings in place of crushed stones as packing in packed beds (other things being same)

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Q177

Prandtl number for water at 20°C is about

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Q178

Blowdown in a cooling tower

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Q179

Boiling point diagram is

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Q180

Bollman extractor

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