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Mass Transfer

Mass Transfer
When the feed to a distillation column is a saturated liquid, slope of the feed line is

Unity
None of these
Zero
Infinity

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Mass Transfer
Operating velocity in a packed tower is usually __________ the flooding velocity.

Equal to
More than
Twice
Half

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

Prandtl number
Sherwood number
Schmidt number
Lewis number

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Mass Transfer
Desirable value of absorption factor in an absorber is

1
< 1
0.5
> 1

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Mass Transfer
If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm.

3 to 4
2.5 to 3
1.2 to 1.5
5

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Mass Transfer
In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.

Either A, or B ; depends on the type of packing
Smaller than
Greater than
Equal to

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