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Thursday 28 November 2024 11:38:04 GMT

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Lê Minh Quân 🤞 :

tìm hộ vd với bạn

2024-11-28 12:41:17

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Siuu Quậy Lộc Hòa :

tym giúp vd với ạ🥺

2024-11-29 05:03:10

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It’s Water Wednesday! Check out the teach-back portion highlight of our recent train the trainer for the Virginia Department of Fire Programs. On the final day, each student becomes the instructor and completes three objective driven scenarios in which they explain the concept to their fellow firefighters. This drill is known as the “thermal rebound drill.” Insight Instructor Andy Starnes is serving the role as the nozzle man with the HEN Nozzle for this demonstration. In many fire departments, firefighters are still being taught only to cool flames. In this video, we see a dramatic amount of heat moving above the firefighters’ heads that isn’t visible optically. When using a hit and move fire attack methodology or short burst for cooling, the heat quickly returns. Without the use of a thermal imaging camera, firefighters are often unaware of this rapid return and changing fire conditions until it’s too late. Physics demonstrates that the greater temperature differential between two areas within an object, the faster the heat transfer will occur. In a metal container, this will happen faster than in a residential structure due to the nature of metal. However, we can see the same effects on drywall, plaster, and other ceilings (which we have filmed and have shared on this channel). If you wish to learn more about the difference between knock back and knock down and thermal rebound, please visit FRSI’s page and read Study of the Impact of Fire Attack Utilizing Interior and Exterior Streams on Firefighter Safety and Occupant Survival Thank you for your support! #HenNozzles #firefighter #thermalimaging #firefighter

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