【Question 171】Boiler Foundation Question (February 19)

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Please hide your replies; be careful when posting, as edits are invalid! Those with different views on the provided answer keys can post discussions the next day. For multiple accounts under the same IP responding to participate, only the first response is considered valid. All participants receive 2 points as a reward. This round consists of multiple-choice questions, with 2 points for each question; 8 points are awarded for getting all questions correct. In principle, scores are given to the top 50 respondents who answer within 48 hours. Please hide your replies; the method for doing this is: http://bbs.hcbbs.com/thread-492556-1-1.html 1. The most fundamental way to prevent low-temperature corrosion in air preheaters is ( ). A. Desulfurization in front of the furnace ； B、Low-oxygen operation ； C. Glass tubes are used in the final stage of the tubular air preheater ； D. Activate the heater to maintain (flue gas temperature + air preheater inlet temperature) above the flue gas dew point temperature. 2. Coal with low volatile matter has a higher ignition temperature; the amount of heat required for the coal powder to reach this ignition temperature from the moment it enters the furnace is also greater. A. High, many B. High, few C. Low, many D. Low, few Answer: D, A