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WILDLAND FIRE S190 EXAM
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WILDLAND FIRE S190 EXAM
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WILDLAND FIRE S190 EXAM QUESTIONS NEWESTACTUAL EXAM COMPLETE 230 QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |
ALREADY GRADED A+
Local topography effects a fire's, (blank), & (blank). - ANSWER: Intensity, and,
Rate/Direction of Spread.
A slopes, (BLANK), is the compass direction the slope faces. - ANSWER: Aspect
The, (blank), of a slope determines the effect of the sun's heat on the slope's plants
& trees, air temperature, & moisture retention of the soil. - ANSWER: Aspect
Solar, (blank), heating can influence fire behavior by influencing fuel moisture and
ignition points. - ANSWER: Radiant Heating
A, (blank), facing slope tends to have heavier fuels, lower temperatures, higher
humidity, & higher fuel moisture, than a, (blank), facing slope. - ANSWER: North,
South
In the Northern Hemisphere, the slopes facing, (blank), receive direct sun rays &
become hotter than the slopes facing any other direction. - ANSWER: South
In the absence of winds, fire usually moves, (blank), uphill than downhill. - ANSWER:
Faster. So the steeper the slope, the faster a fire moves.
Why is the rate of spread (ROS) increased for upslope fires? - ANSWER: Because:
1. The flames are closer to fuel sources.
2. Wind currents typically move uphill during the day, pushing heat to new fuel
sources.
3. Upslope fires create a draft, increasing the ROS.
Wildland fires tend to burn much faster upslope than on level ground because of,
(BLANK). - ANSWER: Preheated fuels
When you have a fire at the top of a slope, building a, (blank), just beyond a ridge
will help you contain the advancing fire. - ANSWER: Fireline
Slope is measure in, (blank over blank), which is expressed as a percentage. -
ANSWER: Rise over Run
Example: A rise of 25 feet divided by a horizontal distance of 100 feet & then
multiplied by 100 represents a 25 percent slope.
Upslope fires can cause, (blank), to roll downhill. - ANSWER: Burning Debris
, What is a "chute"? - ANSWER: A chute is a steep v-shaped drainage on a slope which
can easily channel smoke and fire upward at a rapid rate.
What is a "saddle"? - ANSWER: A saddle is a common name for a depression
between two adjacent hilltops.
Why are "chutes" & "saddles" so dangerous? - ANSWER: 1. They drastically
accelerate fires.
2. They alter the flow of winds causing erratic fire behavior.
3. They change the rate and direction of spread by acting like chimneys & literally
propel the fire up as if through a stove pipe.
Wind channeling is, (blank). - ANSWER: Is a direct result of natural features like
chutes & saddles.
What are the three different types of canyons? - ANSWER: 1. Box canyons
2. Narrow canyons, &
3. Wide canyons
What is a Box Canyon's specific effect on fire? - ANSWER: The creation of strong
upslope drafts results in extreme fire behavior.
What is a Narrow Canyon's specific effect on fire? - ANSWER: Fire can easily spread
fuels on the opposite side by radiation and spotting.
What is a Wide Canyon's specific effect on fire? - ANSWER: Cross-canyon spotting of
fires is not common except in high winds.
Fires starting near the base of box canyons & narrow canyons may react similar to,
(blank). - ANSWER: Similar to a fire in a wood burning stove or fireplace. Air will be
drawn in from the canyon bottom creating very strong upslope drafts.These upslope
drafts create what is called the "chimney effect".
As air drops in elevation the atmospheric pressure, (blank). - ANSWER: Increases.
This causes the air to compress and heat. The resulting winds can create poor
conditions for wildland fire control.
(Blank), winds are the result from air being forced over mountain ridges by
convection or high barometric pressure. - ANSWER: Gravity Winds
Because of high temperatures, fuels as, (blank), elevations, dry out earlier in the year
than those at, (blank), elevations. - ANSWER: lower elevations, higher elevations
There are typically less fuel loads at, (blank), elevations. - ANSWER: higher elevations
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