Heat sensitive materials can be concentrated in an evaporator employing_______________?
Correct answer: B. Vacuum
- A. High pressure
- B. Vacuum
- C. High residence time
- D. None of these
Explanation
Vacuum evaporation lowers the boiling temperature, allowing concentration at a lower thermal load and reducing damage to heat-sensitive materials. High pressure raises the boiling temperature, while long residence time increases degradation risk.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Mass Transfer Operations
669 free Mass Transfer Operations MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Mass Transfer Operations questions
The driving potential for the crystal growth during crystallisation is the _______________ of the solution?
The dimensionless group in mass transfer that is equivalent to Prandtl number in heat transfer is_________________?
In a laboratory test run, the rate of drying was found to be 0.5 x 10^-3 kg/m2.s, when the moisture content reduced from 0.4 to 0.1 on dry basis. The critical moisture content of the material is 0.08 on a dry basis. A tray dryer is used to dry 100 kg (dry basis) of the same material under identical conditions. The surface area of the material is 0.04 m2/kg of dry solid. The time required (in seconds) to reduce the moisture content of the solids from 0.3 to 0.2 (dry basis) is______________________?
Weep holes provided in the plates of a distillation column ____________________?
What is the slope of the operating line in the rectifying section of a distillation column ?
Which of the following efficiencies can be greater than 100% ?