【Question 010】Boiler basic questions

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This post was last edited by zgj2405 on 2009-11-6 21:20. Please hide your replies; think carefully before 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 valid. All participants receive 2 points as a reward. This round consists of multiple-choice questions, with 2 points for each question; an additional 5 points are given for getting all answers correct. For specific hiding methods, see: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D1. 1. During the power combustion process, to enhance combustion, it is necessary to find ways to ( ). A. Increase the furnace temperature B. Supply sufficient air C. Improve the mixing of coal powder and air D. Ensure adequate combustion time 2. As the rated evaporation capacity of the boiler increases, its blowdown rate ( ). A. Increase B. Decrease C. Remain relatively unchanged D. Be directly related to the evaporation rate. 3. The extent of damage caused by moisture to a boiler can be estimated based on the ( ) of coal combustion. A. Converted moisture ； B. Internal moisture ； C. External moisture ； D. Ash content. 4. As the boiler pressure gradually increases, its cycle rate ( ). A. Fixed and unchanging ； B. Gradually increase ； C. Gradually decrease ； D. Uncertain. 5. When the boiler is subjected to external disturbances (a decrease in electrical load), what is the trend of the drum water level? A、Continuous decline B、Decline first then rise C、Rise first then decline D、Continuous rise