Related Questions

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
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
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
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
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
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
Theoretical flame temperature of a fuel is that temperature which is attained, when the fuel is completely burnt 'using theoretical amount of air in
A Air
B Oxygen
C Either A or B
D Either A or C without gain or loss of heat
At __________ reflux, theoretical number of plates in a distillation coloumn is calculated using Fenske-Underwood equation.
A Operating
B Total
C Minimum
D Maximum permissible
The minimum number of theoretical plates is required for achieving a given separation in distillation column with
A No reflux
B Total reflux
C Zero reflux ratio
D Minimum reflux ratio
At what value of reflux ratio, number of theoretical plates in a distillation column is minimum?
A 0
B 1
C ∞

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