December 9th: True/False question No. 115 on boiler foundations: (A certain score will be given to the top 50 participants)
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True or False: When increasing the air volume, increase the blast air first and then the exhaust air； When reducing the air volume, reduce the exhaust air first, then the supply air. ( ) Thank you for your support. Correct answers earn an additional +5–8 points to wealth; incorrect answers earn +1 point. For those in the top 60, regardless of whether the answer is correct or not, they receive +3 points to wealth
When increasing the air volume, first increase the forced air flow and then the induced air flow； When reducing the air volume, reduce the exhaust air first, then the supply air. (Yes)
When increasing the air volume, first increase the forced air flow and then the induced air flow； When reducing the air volume, reduce the exhaust air first, then the supply air. (X)
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When increasing the air volume, first increase the forced air flow and then the induced air flow； When reducing the air volume, reduce the exhaust air first, then the supply air. Wrong
When increasing the air volume, first increase the forced air flow and then the induced air flow； When reducing the air volume, reduce the exhaust air first, then the supply air. (Mistake) It’s reversed
Error: When increasing the air volume, increase the forced air flow first, then the induced air flow； When reducing the air volume, reduce the exhaust air first, then the supply air. (x)
When increasing the air volume, first increase the forced air flow and then the induced air flow； When reducing the air volume, reduce the exhaust air first, then the supply air. (Mistake)
The answer is wrong. The correct approach is that when increasing the air volume, it is necessary to first increase the intake air and then the forced air; when reducing the air volume, it is necessary to first reduce the forced air and then the intake air, so as to keep the furnace operating under negative pressure.