Related Questions

What is the slope of the operating line in the stripping section of a distillation column?
A 0
B $$\infty $$
C > 1
Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section.
A Less than
B More than
C Same as
D Either more or less (depending upon relative volatility)
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
In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed
A q > 1
B q
C q = 1
D q = 0
In rectifying section of a continuous distillation column, the
A Vapour is enriched with low boilers
B Vapour is enriched with high boilers
C Liquid is stripped of high boilers
D None of these
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
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
Optimum reflux ratio in a continuous distillation column is determined by the
A Maximum permissible vapour velocity
B Flooding limit of the column
C Total cost consideration (fixed cost of the column plus the cooling water & steam cost)
D None of these
In case of a continuous distillation column, increase in reflux ratio may result in the
A Lower fixed charges for the column
B Greater cost for the reboiler heat supply
C Greater cost for the condenser coolant
D All of the above
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

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