As the reflux ratio in a distillation column is increased from the minimum, the______________________?
Correct answer: C. Total cost first decreases and then increases
- A. Slope of the operating line in stripping section decreases
- B. Number of plates decreases very slowly first and then more and more rapidly
- C. Total cost first decreases and then increases
- D. Liquid flow increases while the vapor flow decreases for a system
Explanation
Increasing reflux reduces the number of stages required, but it increases internal flows and operating cost. The total annualized cost therefore commonly falls at first and then rises, giving an optimum reflux ratio.
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
Fenske-Underwood equation used for calculating the minimum number of theoretical plates in distillation column is valid for_________________?
When the feed to a distillation column is a saturated liquid, slope of the feed line is_____________________?
The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line) ?
An ideal tower packing should not _______________________?
(NSh/NRe.NSc) is termed in mass transfer operation as the __________________________?
The rate of solid-liquid extraction is limited by the_________________?