Q241
Open questionWhen the __________ the relative humidity of air decreases, despite an increase in the absolute humidity.
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Chemical Engineering · all questionsMass Transfer
Mass Transfer
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Q242
Open questionMolecular diffusivity of a liquid
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Q243
Open questionMass transfer co-efficient (K) and diffusivity (D) are related according to film theory as
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Q244
Open questionSand is dried in foundaries in a___drier.
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Q245
Open questionWhich of the following adsorbant is used in the refinning of sugar?
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Q246
Open questionWhen the mixture to be distilled has a very high boiling point and the product material is heat sensitive, the separation technique to be used is __________ distillation.
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Q247
Open questionThe temperature to which a vapour gas mixture must be cooled (at varying humidity) to become saturated is called the __________ temperature.
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Q248
Open questionSteady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is called the __________ temperature.
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Q249
Open questionHypersorption refers to a __________ process.
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Q250
Open questionA 25 cm × 25 cm × 1 cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions. It took 1500 seconds for the weight of the sheet to reduce to 1.05 kg. Another 1 m × 1 m × 1 cm flat sheet of the same material is to be dried from one side only. Under the same constant drying rate conditions, the time required for drying (in seconds) from its initial weight of 19.2 kg to 17.6 kg is
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Q251
Open questionDuring drying operation, it is easier to remove the __________ moisture.
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Q252
Open questionAt constant pressure, with increase of temperature, the dew point will
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Q253
Open questionAbsorption accompanied with chemical reaction is exemplified by the absorption of
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Q254
Open questionIn gas-liquid contact operation, the number of ideal stages, This is true when the stripping factor 'S' is
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Q255
Open questionThe term "approach" in a cooling tower refers to the difference in the temperature of the
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Q256
Open questionFor turbulent mass transfer in pipes, the Sherwood number depends on the Reynolds number as
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Q257
Open questionMake up water is supplied during cooling tower operation to compensate for water losses due to
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Q258
Open questionThe Reynolds number of the liquid was increased 100 fold for a laminar falling film used for gas-liquid contacting. Assuming penetrating theory is applicable, the fold increase in the mass transfer co-efficient (Kc) for the same sytem is
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Q259
Open questionFlash distillation is suitable for separating the constituents of a binary system, which
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Q260
Open questionPick out the wrong statement.
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