Heat exchangers operating, when the asymptotic range is reached, ?
Correct answer: B. Results in making part of the heating surface inactive
- A. Provide very large heat transfer co-efficient
- B. Results in making part of the heating surface inactive
- C. Results in abruptly increased velocity
- D. None of these
Explanation
When the outlet temperature approaches the heating-fluid or wall temperature, increasing the exchanger length gives negligible additional temperature driving force. The added surface then becomes effectively inactive, so option b describes the asymptotic range.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Heat Transfer Operations
645 free Heat Transfer Operations MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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 Heat Transfer Operations questions
In case of evaporators, liquid entrainment results primarily due to_________________?
Asymptotic conditions is reached, when for a fluid flowing in laminar flow through a long tube___________________?
What is the absorptivity of a black body?
In counter flow compared to parallel flow, ?
In a single effect evaporator, the economy is________________?
Small scale evaporation is done in a_________________?