【Test Your Knowledge】Basic Chemical Engineering Knowledge (210) Please hide your replies

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This post was last edited by wqhhdiaodu on 2009-10-16 09:23. In accordance with the forum’s guidelines, the maximum score for this activity is 15 Wealth points; giving scores based on charm is prohibited. At the same time, friend requests and repeated ratings are declined. To encourage active participation from members, full marks are given for all correct answers, while 10–12 wealth points are deducted for each incorrect answer. 2 mistakes result in 8–10 wealth points; the rest receive encouragement points of 4–6 wealth points for their participation. 1. After the effluent from urban sewage treatment plants meets the secondary standards, it can be discharged into Class III water bodies. 2. In the bubble column, the gas is the continuous phase while the liquid is the dispersed phase, with a high degree of liquid backmixing. 3. Parallel reactions: If the activation energy of the main reaction is greater than that of the side reaction, increasing the temperature helps to improve selectivity. 4. The catalyst can change the reaction pathway, so the initial and final states of the system also change. 5. In iron-based catalysts for ammonia synthesis, coking can be reversed by introducing O2 at high temperatures. 6. The reaction order of any chemical reaction is related to its stoichiometric coefficients. 7. Kelvin is an international base unit. 8. The thermal conductivity λ, just like viscosity μ, is one of the physical properties of a substance; it indicates the material’s ability to conduct heat. 9. The critical point is the boundary between constant-speed drying and reduced-speed drying; the higher the moisture content Xc, the better. 10. During distillation, with a saturated liquid feed, the intersection of the operating lines for the rectification and stripping sections is at (xF, xF). Answer to Issue 210: Wrong Wrong Right Right Wrong, Wrong Right Right Wrong. No scoring is given in principle if not hidden. Thank you all! To hide the method, click here: Hide Method. Answer using the same IP; only the first post is valid. Also, be careful when posting; edits are invalid! To encourage independent thinking, those who answer all questions correctly are invited to go to the dedicated reward collection post in [Test Your Knowledge] to claim their prizes (click the link)!