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Mass Transfer

Mass Transfer
The dew point of a saturated gas phase equals the __________ temperature.

Wet bulb
Room
None of these
Gas

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Mass Transfer
A solid material shows case hardening properties while drying. Which of the following should be controlled to control the drying process?

Temperature of the solid
Humidity of inlet air
Flow rate of inlet air
Relative humidity of outlet air

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Mass Transfer
The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the

None of these
Differential heat of adsorption
Integral heat of adsorption
Heat of wetting

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Mass Transfer
The most common packing used in industrial operations is __________ rings.

Raschig
Cross-partition
Lessing
Single spiral

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Mass Transfer
The rough value of diffusion co-efficient of water vapor into air at 25°C may be about __________ cm²/sec.

0.25
0.0025
1.25
2.5

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Mass Transfer
__________ extractor is used for the concentration of radioactive nuclear waste.

Pulsed column
None of the listed here
Seive plate
Mixer-settler

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