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Mass Transfer

Mass Transfer
Absorption factor, for a fixed degree of absorption from a fixed amount of gas should be

1
> 1
< 1
≤ 1

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Mass Transfer
In distillation columns, the number of bubble caps per tray primarily depends upon the

Allowable gas velocity
Feed composition
Allowable gas and liquid velocities
Allowable liquid velocity

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Mass Transfer
At 750°K and 1 atm, the approximate value of Schmidt number for air is

0.01
0.1
1
10

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Mass Transfer
Reboiler is considered as one theoretical plate, because

Of the assumption that vapour and liquid leaving the reboiler are in equilibrium
Vapour is recycled to the column
Reboiler itself contains one plate
None of these

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Mass Transfer
Make up water is supplied during cooling tower operation to compensate for water losses due to

Entrainment
Evaporation
Blowdown
All of these

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Mass Transfer
Which of the following plays an important role in problems of simultaneous heat and mass transfer?

Sherwood number
Prandtl number
Schmidt number
Lewis number

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