Discussion on Real Exam Questions Related to Specialized Knowledge in Metallurgy and Chemistry
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34. A factory originally had two quick-install boilers; when operating simultaneously, each boiler generated 11.5 Nm3 of flue gas per second, with an exit temperature of 150°C and a pressure of 110 kPa (A). To increase production now, another boiler of the same type is needed. In accordance with environmental regulations, the existing low and old chimney must be replaced with a new, taller one. If the exit gas flow velocity is allowed to be 25 m/s, which of the following values should be chosen for the inner diameter of the outlet of the new chimney (in mm)? Tip: Flue gas can be considered an ideal gas. A、1000 B、1300 C、1400 D、1600 What do you think the answer is?
Thank you for the professional answer from Floor 5. The question requires three, so if you misread it, you won’t be able to select the correct answer