★Specialized Examination for Chemical Engineering ★ — One question per day (2016-1-9) — Points are awarded for participation
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Points system for the daily question: Participation – 1~3 points; Correct answer – 5 points; In-depth analysis – 5~10 points. The answer is provided the next day. Due to limited capabilities, I am unable to provide more in-depth explanations for each question; therefore, on the second day, in addition to offering reference options, I will also remove the restriction on reading replies. I hope that all candidates can learn from one another and improve together! Daily Question (2016-1-9): 1. Which of the following operating conditions is suitable for using a historical thermosyphon reboiler? A. Media with high viscosity and a tendency toward having a specific structure. B. Operating conditions that require a high vaporization rate (vaporization rate > 80%). C. Operating conditions that require a high heat transfer coefficient, but no extremely high vaporization rate is required. D. Longer residence time in the heating zone is acceptable. Answer: C
C. Conditions requiring a high heat transfer coefficient, but with no high requirement for the gasification rate
C requires forced transportation using a pump due to its high viscosity; B has a gasification rate of generally no more than 30%; D permits a short residence time in the heating zone
C. Conditions requiring a high heat transfer coefficient, but with no high requirement for the gasification rate ~~~~~~~~~~
1. Which of the following operating conditions is suitable for choosing a historical thermosyphonic reboiler? (C) A. Media with high viscosity and a tendency toward having a specific structure. B. Operating conditions that require a high vaporization rate (vaporization rate > 80%). C. Operating conditions that demand a high heat transfer coefficient, but do not require a very high vaporization rate. D. Conditions that allow for a longer residence time in the heating zone
Which of the following operating conditions is suitable for choosing a historical thermosiphonic reboiler? A B. Operating conditions requiring a high gasification rate (gasification rate > 80%)
Which of the following operating conditions is suitable for choosing a historical thermosiphonic reboiler? B. Operating conditions requiring a high gasification rate (gasification rate > 80%)