Wildland firefighting S-190 Exam Study
Guide Questions and answers with 100%
Complete Solutions | verified &updated 2024
Flaming front/ Fire front - ✔✔Where continuous combustion is taking
place within a fire. Leading edge of fire perimeter. Surfaces fires=
smoldering combustion.
Combustion - ✔✔Self sustaining process of a fuel that produces heat and light.
Smoldering - ✔✔Burning without flame. Moves slowly.
Light fuels - ✔✔Fast drying. Usually in a shallow flame front. High surface area
to volume ratio. Less than 1/4 in diameter easily ignite and burn rapidly
Heavy fuels - ✔✔Logs, large limbs, not easy to ignite. Burn hot, long and slow
,Creeping fires - ✔✔Low flame. Burns slowly
Running fire - ✔✔Spreads rapidly. Well defined head.
Fire crowning - ✔✔When the fire spreads across the tree tops faster than
the surface
Fire.
Torching fire - ✔✔Not as serious as a crown fire. Ignites tree tops for a bit
then goes back to surface fire
Blowup - ✔✔Sudden increase in ROS. Can behave like fire storms.
Fire Suppression - ✔✔Work connections with putting out the fire.
, Flare up - ✔✔Short time and doesn't change existing control plans.
What cause flare ups? - ✔✔Air blasts from helicopters and air tankers.
When can blow and flare ups occur? - ✔✔Smaller fires, isolated portions of
big fires. When the fire is calm and innocent.
Mop up - ✔✔Making the fire safe after it's controlled.
Firewhirl - ✔✔Spinning columns of rising air and fire gases. Carry smoke,
debris and flames. Can cause spotting. 1-500ft in diameter.
Control line - ✔✔Constructed or natural fire barriers. Also describes treated
fire edges.
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