S-290 Intermediate Wildland Fire Behavior Questions and Answers Rated A+

S-290 Intermediate Wildland Fire Behavior Questions and Answers Rated A+ T/F Topography can directly and indirectly affect fuels and their availability for combustion True Of the three environmental factors that influence fire behavior, which is the least variable topography What are the 3 Environmental Factors that influence Fire Behavior? 1) Weather 2) Topography 3) Fuels The least critical form of heat transfer that influences rate of spread in a running wildland fire is. Conduction The point to which a combustible material must be heated to produce self sustaining combustion is known as the Ignition temperature What factors primarily affect fireline intensity? Fuel size Fuel moisture Fuel temperature Fuel compactness and arrangement ALL OF THE ABOVE T/F Two requirements for long range spotting are wind and a well developed convection column. True A fire that advances through canopies of brush and trees is known as a Crown fire Fire is burning in litter on top of the ground, but occasionally carries into the crowns of individual trees, which produces burning embers that start new fires outside the fire perimeter Surface fire with torching and spotting T/F Upward moving air contracts and warms False As air sinks it Increases in pressure, warms and compresses Foehn winds can adversely affect wildland fires because they can produce Strong winds, warmer temperatures, and very low relative humidity When stable air is forced over a mountain range, and then descends the leeward slope as dry, warmed air, it is called A foehn Wind (look this up) T/F Bends in canyons are likely places for eddies to form True Local winds are best described as Small scale convective winds of local origin caused by differences in heating and cooling East, Mono, Santa Ana, and Chinook are all