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.Management Sciences
Category: Mass Transfer
At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid _______________ that in dry packed tower ?
A. Is greater than
B. Is lower than
C. Is same as
D. Cannot be predicted as data are insufficient
If the solubilities of different components (in a liquid-liquid extraction system) increase with rise in temperature, then the temperature above which they dissolve completely is known as the critical solution temperature (CST or consolute temperature). If solubilities increase with decrease in temperature, then CST is the temperature below which they dissolve completely. If a binary system has no critical solution temperature, it implies that___________________?
A. The system comprises of partially miscible liquids
B. The system comprises of miscible liquids
C. The system comprises of an azeotrope
D. On heating, a vapor phase will appear; while on cooling, a solid phase will appear
Which of these columns incurs the lowest pressure drop ?
A. Packed column (with stacked packing)
B. Packed column (with dumped packing)
C. Bubble plate column
D. Pulse column
Minimum reflux ratio in a distillation column results in_____________________?
A. Optimum number of trays
B. Minimum reboiler size
C. Maximum condenser size
D. Minimum number of trays
Gaseous diffusivity at atmospheric pressure is of the order of _____________________ cm2/second?
A. 1
B. 1 to 5
C. 5 to 10
D. > 10
Pick out the wrong statement pertaining to leaching ?
A. Fine solids cannot be leached in a Pachuca tank
B. Door classifier can be used for leaching of coarse solids
C. Vegetable seeds can be leached in either of Bollman extractor, Rotocel or Kennedy extractor
D. Very high temperature is not needed for the leaching of sugar beet
At a fixed pressure, the humidity depends upon the partial pressure of vapor in the mixture. Humidity of a vapour free gas is ________________ percent.?
A. 100
B. 0
C. 50
D. Between 0 and 100
When the gas to be dissolved in liquid is a/an ___________________ then normally co-current adsorber are used?
A. Mixture of two gases
B. Pure gas
C. Ideal gas
D. Sparingly soluble gas
Which of the following equipments is not used for gas dispersion ?
A. Agitated vessels
B. Bubble cap tray towers
C. Perforated sieve tray towers
D. Spray towers
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