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Mass Transfer

Mass Transfer
Large scale drying of sugar is done in a __________ dryer.

Tray
Spouted bed
Truck
Rotary

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Mass Transfer
Mass transfer co-efficient varies as DAB0.5, according to the __________ theory.

Surface renewal
None of these
Film
Penetration

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Mass Transfer
Capacity of a rotary dryer depends on its

Both Inclination with ground surface & R.p.m
Inclination with ground surface
None of the listed here
R.p.m

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Mass Transfer
For achieving rapid drying rate in a spray dryer, the diameter of the particles in the feed should be in the range of __________ microns (1 mm = 1000 microns).

> 500
22190
200-300
43835

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Mass Transfer
Bound moisture is that liquid which exerts an equilibrium vapor pressure __________ that of the pure liquid at the given temperature.

Either A or B; depends on the solid
More than
Less than
Equal to

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Mass Transfer
If f is defined as above, then which of the following applies to a feed at dew point?

F = 1
F < 1
0 < f < 1
F > 1

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