Higher boiling fractions like atmospheric residue is distilled under vacuum at low temperature because at high temperature, there is a tendency of the predominance of ____________________?
Correct answer: B. Coking
- A. Thermal cracking
- B. Coking
- C. Gum formation
- D. Discoloration
Explanation
Vacuum lowers boiling temperatures so heavy fractions can be distilled without severe thermal damage. At higher temperatures, residue increasingly undergoes carbon-forming reactions that produce coke.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Chemical Process Principles
2,710 free Chemical Process Principles 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 Chemical Process Principles questions
Which of the following has the minimum °API gravity of all ?
Natural gas recovered along with crude oil from oil wells is called wet natural gas which has a higher ______________ compared to the dry natural gas?
Salt content (measured as sodium chloride) in electrically desalted crude oil comes down to a level of about __________________ ptb (pounds per thousand barrel) ?
The best method of determining sulphur in crude oil is by the _______________ method?
The most important property for a jet fuel is its________________?
Which of the following is not an important property of fuel oil/furnace oil ?