Storage and Transportation Technology: 【Question of the Day】11-03-25【Friday】
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This post was last edited by flute6 on 2011-3-28 at 12:27. Steam fire extinguishing is a type of fire extinguishing method using ( ). (A) Cooling (B) Isolation (C) Asphyxiation (D) Suppression Note: 1) Participants receive rewards (1-5 points) to encourage more explanations. An additional reward of 1-5 points will be given if the specific source of the standard is indicated. 2) Please hide your replies; the method for doing this is: http://bbs.hcbbs.com/thread-492556-1-1.html. Replies that are not hidden will not be scored. 3) The answer will be visible immediately after responding; please do not edit your reply, as no score will be given if edits are made. P 4) Please indicate the question number when answering to avoid errors when assigning scores. Please also avoid submitting answers repeatedly in a malicious manner; if this is due to an error, contact the moderators or administrators. Otherwise, points will be deducted. 5) The top 50 participants will receive prizes, while no scoring will generally be given for posts beyond position 50. 6) The default deadline for old posts is 0:00 the next day; no scoring is generally carried out after that time. u 7) All the questions I create are formulated based on relevant standards and experience. If there are any disputes regarding the answers, please post a separate discussion thread or contact the moderator via text message. Answer: C
Choose C. Steam can be used to extinguish fires by using it to dilute the air in the fire area, reducing the oxygen content in that air and thereby preventing combustion
Steam fire extinguishing is a type of （ ） fire extinguishing method. " (C) Asphyxiation
I. Cooling fire extinguishing method: The extinguishing agent is sprayed directly onto the burning object to lower its temperature below the ignition point, thereby stopping the combustion； Alternatively, the extinguishing agent can be sprayed on the materials near the fire source to prevent new ignition points from forming due to the heat radiation from the flames. Cooling fire suppression is a major method of extinguishing fires, with water and carbon dioxide being commonly used as extinguishing agents to cool down and put out the fire. Fire extinguishing agents do not participate in the chemical reactions that occur during combustion during the fire extinguishing process. This method belongs to the physical fire extinguishing methods. II. Isolation fire extinguishing method: Remove the surrounding unburned combustible materials or isolate them from the burning materials, thereby cutting off the supply of fuel and stopping the combustion due to the lack of combustible material. Specific methods include: 1. Remove combustible, flammable, explosive, and oxidizing materials from near the source of fire ； 2. Close the valves on the pipelines for flammable gases and liquids to reduce and prevent flammable substances from entering the combustion area ； 3. Try to prevent the spread of flammable and combustible liquids ； 4. Demolish flammable buildings adjacent to the fire source to create a zone that prevents the spread of the fire. III. Smothering fire extinguishing method: Prevent air from entering the burning area or dilute the air with non-flammable gases, so that the burning material lacks sufficient oxygen and goes out. The specific method is as follows: 1. Cover the burning material with non-flammable or difficult-to-ignite materials such as sand, cement, wet burlaps, and wet quilts ； 2. Spray fire extinguishing agents such as mist water, dry powder, or foam to cover the burning material ； 3. Fill the container or equipment where a fire has occurred with water vapor or inert gases such as nitrogen or carbon dioxide ； 4. Enclosed buildings, equipment, and openings on fire ； 5. Spray non-flammable gases or liquids (such as carbon dioxide, nitrogen, carbon tetrachloride, etc.) onto the area where the fire is occurring or onto the burning material.