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S-290 Final (2 VERSIONS) Latest ACTUAL 2024 EXAM RATED PASS $18.99   Add to cart
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S-290 Final (2 VERSIONS) Latest ACTUAL 2024 EXAM RATED PASS

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S-290 Final (2 VERSIONS) Latest ACTUAL 2024 EXAM RATED PASS

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  • May 20, 2024
  • 19
  • 2023/2024
  • Exam (elaborations)
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  • S-290

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1 S-290 Final (2 VERSIONS) Latest ACTU AL 2024 EXAM RATED PASS A fire that advances through canopies of brush and trees is known as a: - ANSWER -Crown fire Fire is burning in litter o n 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. - ANSWER -Surface fire with torching and spotting. Fire begins burning into the crowns and spr eads through the canopy. There is a sudden increase in fireline intensity where the fire controls it's environment. At one point flames can be seen carried high into the convection column with a whirling motion. - ANSWER -Ground fire with smoldering and fla re ups. T/F Topography can directly and indirectly affect fuels and their availability for combustion. - ANSWER -True Of the three primary environmental factors that influence fire behavior, which is the least variable? - ANSWER -Topography Slope affects fuel availability to burn because: - ANSWER -Fuels are preheated upslope through radiation and convection. 2 Rolling firebrands ignite new fuels below. Select the correct stat ement regarding the shape of the country and it's effect on wild land fire behavior. - ANSWER -The shape of the country can influence the curing of fuels as well as the intensity and spread of wild land fires. Aspect affects fuels and their availability to burn because: - ANSWER -All of the above are correct Southwest slopes provide drier sites Vegetation type and fuel moisture content changes by aspect Shading on northern aspects can increase RH Select the statement that best describes the effect of slope steepness on fuel availability. - ANSWER -A fire starting at the base of a slope has more fuel available for spread. A fuel model is defined as: - ANSWER -A set of tubers that define fuel input fo r use in the surface fire spread model. The 4 fuel groups as defined in the Fire Behavior Prediction System are: - ANSWER -Grass, shrub, timer litter, and logging slash. Available fuels are: - ANSWER -All dead and live fuels that will ignite and continue t o burn. Fuel loading definition: - ANSWER -The oven dry wight of fuel in an given area, expressed in tons/acre or pounds/acre. 3 Fuel moisture content definition: - ANSWER -The amount of water in a fuel expressed as a percent of the oven dry weight of that f uel. Fuel size and shape definition: - ANSWER -The surface -area -to-
flume ratio. Fuel chemical content definition: - ANSWER -The presence of volatile substances in a fuel. Which of the following fuel characteristics affect all 6 wild land fire behavior con cerns; i.e. ignition, spread, intensity, spotting, torching, and crowning. - ANSWER -Moisture content The least critical form of heat transfer that influences rate of spread in a running wild land fire is: - ANSWER -Conduction The point to which a combustible material must be heated to produce self -sustaining combustion is known as the: - ANSWER -
Ignition temperature Fireline intensity is dependent upon: - ANSWER -All of the above. Fuel size Fuel moisture Fuel temperature

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