Results from very low gas velocity
Is desirable from point efficiency consideration
Is characterised by the presence of foam throughout the space between trays
Reduces the overall pressure drop
✅ The correct answer is option C.
Chemical Engineering MCQs
The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives
Low pressure drop and high hold up
High pressure drop and low hold up
Low pressure drop and low hold up
High pressure drop and high hold up
✅ The correct answer is option C.
In most of the vacuum crystalliser, vacuum is generally produced by means of a
Suction pump
Compressed air jet
Steam jet ejector with a barometric condenser
None of these
✅ The correct answer is option C.
In steam distillation, the
Temperature is 100°C
Temperature is more than 100° C
Product must be immiscible with water
Temperature is higher than the boiling point of either component
✅ The correct answer is option C.
__________ equation applies to diffusivities in liquids.
Gilliland
Hirschfelder
Wilke and Chang
None of these
✅ The correct answer is option A.
Radioactive nuclear waste is treated in
Mixer-settler extractor
Rotating-disc contactor
Pulsed column extractor
Bollman extractor
✅ The correct answer is option C.
Tea percolation employs
Liquid-liquid extraction
Leaching
Absorption
None of these
✅ The correct answer is option B.
Minimum reflux ratio in a distillation column results in
Optimum number of trays
Minimum reboiler size
Maximum condenser size
Minimum number of trays
✅ The correct answer is option C.
Which of the following remains constant during sensible cooling process ?
Specific humidity
Partial pressure of vapour
Both A & B
Neither A nor B
✅ The correct answer is option C.
To remove all the moisture from a wet solid it requires exposure to __________ air.
Perfectly dry
Highly humid
High temperature
None of these
✅ The correct answer is option A.