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Mass Transfer

Mass Transfer
Prandtl number for water at 20°C is about

70
7
150
0.7

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Mass Transfer
The unit of volumetric diffusivity is

Cm²/seC₂
Cm²/sec
Cm/sec
Cm³/sec

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Mass Transfer
During drying of a solid, the critical moisture content increases with

Decreased drying rate
Increased drying rate
Increased thickness of the solid
Both B and C

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Mass Transfer
Equilibrium moisture of a solid is equal to the total moisture minus free moisture. Which of the following substances will have maxi-mum equilibrium moisture?

Rag paper
Anthracite coal
Bamboo
Inorganic solids

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Mass Transfer
Water entrained by circulating air in cooling towers is termed as

Vapor load
None of the listed here
Drift
Blow down

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Mass Transfer
Langmuir equation is associated with

Steam distillation
Leaching
Multicomponent absorption
Adsorption

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MORE MCQ ON Mass Transfer

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