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Mass Transfer

Mass Transfer
When the psychometric ratio is __________ then the adiabatic saturation temperature and wet bulb temperature becomes equal.

1
?
> 1
< 1

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Mass Transfer
The binary diffusivity in gases at atmospheric conditions is about

10-3 sec/cm
10-4 cm²/seC₂
10-9 cm/sec
10-1 cm²/sec

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Mass Transfer
Occurrence of 'case hardening' during drying of a high moisture solid cake __________ the drying rate.

Decreases
Exponentially increases
Does not affect
Increases

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Mass Transfer
The 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

1
10
5
100

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Mass Transfer
Dried finished product sampled from various parts of a __________ dryer exhibits non-uniformity in the moisture content.

Tray
None of these
Rotary
Freeze

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Mass Transfer
Separation of a mixture of two gases by absorption in the liquid solvent depends upon the difference in their

Density
Relative volatility
Viscosity
Solubility

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