Fire burns in three dimensional space, with flames attaching to inclined surfaces leading to a number of observed behaviors. Flames from a fire burning in a channel inclined at 10° above the horizontal will behave in a manner similar to:
Fire burns in three dimensional space, with flames attaching to inclined surfaces leading to a number of observed behaviors. Flames from a fire burning in a channel inclined at 10° above the horizontal will behave in a manner similar to:
When a surface is inclined less than 15° from the horizontal, flames tend to detach and become thicker, resembling the characteristics of a pool fire. Given that the channel in question is inclined at 10°, the behavior of the flames would be similar to a pool fire rather than to any other type listed.
ANS: A. FPH 2-25
ANS: C
C correct answer
Flames attach to upward-facing burning surfaces inclined more than 15° from horizontal, making flame spread and heat flow along the incline much more like that on a vertical surface than on a horizontal one.
If the upward-facing burning surface is inclined less than 15°, flames are detached and much thicker, with the appearance and high heat transfer rates typical of pool fire flames.