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The section contains questions and answers on drying rate, drying time period calculation and moisture reduction in drying.
We require __ fractionator(s) for separating a binary azeotropic mixture.
1
2
3
4
The primary process involved in azeotropic separation is
Condensation
Decantation
Agitation
All of the above
The second fractionator tower is applicable for the stripping process alone. True or false?
True
False
The condenser required for rectifying binary azeotropic mixture is
1
2
3
4
If the distillate has a composition of azeotrope and the residue has rich phase of one component, then the azeotropic mixture is a
Maximum-boiling mixture
Minimum boiling mixture
Constant boiling mixture
Differential boiling mixture
The method applicable for azeotropic rectification is
McCabe method
Ponchon method
Extraction method
Other method
For azeotropic rectification, which of the following is applicable?
The distillate should be above bubble point
To have the excessive vapour loss
To decrease the internal reflux ratio
None of the above
For the maximum boiling mixture, the residue has the azeotropic mixture. True or false?
True
False
The vapour should not get lost from the decanter to prevent composition change. True or false?
True
False
Consider a saturated liquid-vapour mixture; if the liquid flow rate inside the enriching and stripping sections of a fractionator are 50 and 40 mol/h respectively, and the feed rate is 10 mol/h, find the feed condition.
Saturated vapour
Saturated liquid
Superheated vapour
None of the above
At what feed condition does the slope of the flash vaporization line become zero?
Saturated liquid
Saturated vapour
Superheated vapour
None of the above
The point where the operating line and the equilibrium line meet in distillation methods is known as
Plait point
Q point
Pinch point
None of the above
The equilibrium composition of liquid and vapour in a feed can be identified by
The intersection of q line with equilibrium line
The intersection of q line with operating line
The intersection of operating line with equilibrium line
None of the above
If the slope of the q-line is found to be zero in an operation, the enthalpy of feed equals the enthalpy of
Liquid
Vapour
Mixture
None of the above
The distillate from the first fractionator should be __ the bubble point.
Below
More than
Equal to
None of the above
