Smoker's equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the

A Relative volatility is close to one (e.g., separation of close boiling isomers)
B Feed is not at its bubble point
C Number of equilibrium stages in only stripping section is to be calculated
D Number of equilibrium stages required is likely to be very small

Correct Answer: Relative volatility is close to one (e.g., separation of close boiling isomers)

Bissoy MCQ
#Chemical Engineering #Process Equipment And Plant Design

Related Questions

If 2/3rd of the workers in an office are non smokers, what is the ratio of smokers to non-smokers?
A 1 : 2
B 2 : 5
C 3 : 5
D 2 : 3
Which of the following is not a graphical method (but is an analytical method) for the calculation of theoretical number of stages in case of continuous binary distillation?
A Sorel-Lewis method
B McCabe-Thiele's method
C Ponchon-Savarit method
D None of these
If 1/3 of the workers in an office are smokers, what is the ratio of smokers to nonsmokers?
A 2: 5
B 2 : 1
C 1 : 2
D 2 : 3
Which of the following is not a valid assumption in continuous binary distillation for calculating the number of equilibrium stages by Mc-Cabe-Thiele's method?
A Sensible heat changes for vapour & liquid are negligibly small
B Reflux is not a saturated liquid
C Molar latent heat of the two components are equal
D Heat of mixing of normal liquid is assumed to be zero
With increase in the reflux ratio for a fixed production from a continuous binary distillation column, the __________ decreases.
A Fixed charges initially
B Running cost of cooling water for condenser
C Vapour & liquid load both
D Running cost of steam for reboiler
Fenske's equation for determining the minimum number of theoretical stages in distillation column holds good, when the
A Relative volatility is reasonably constant
B Mixture (to be separated) shows negative deviation from ideality
C Mixture (to be separated) shows positive deviation from ideality
D Multicomponent distillation is involved
In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at __________ reflux.
A Total
B Minimum
C Operating
D Maximum permissible
For a fixed number of ideal stages in a distillation column, as the reflux ratio is increased, the difference in composition between the top and bottom product streams
A Increases
B Decreases
C Remains unaffected
D Passes through a maximum
Mc Cable Thiele method used for finding theoretical stages in a distillation column assumes that the
A Sensible heat differences are small, because the temperature changes from tray to tray is small
B Trouton's rule is applicable
C Liquid/vapor loading across the column remains constant
D All of the above
In a continuous distillation column, the optimum reflux ratio ranges from __________ times the minimum reflux ratio.
A 1.1 to 1.5
B 1.6 to 2
C 2.2 to 2.6
D 2.7 to 3

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