S 190 Introduction To Wildland Fire Behavior Exam 2024 | All Questions And
Correct Answers (Already Graded A+) | Verified Answers | Latest Version
Wildland Fire - (CORRECT ANSWER)Unplanned and unwanted fire requiring suppression action; an
uncontrolled fire, usually spreading through vegetative fuels. These fires can threaten structures or
other improvements
Fire Behavior - (CORRECT ANSWER)Manner in which a fire reacts to the variables of fuel, weather, and
topography
Topography - (CORRECT ANSWER)Land surface configuration
Crew - (CORRECT ANSWER)Organized group of firefighters under the leadership of a crew leader or
other designated supervisor; sometimes referred to as a "company" in municipal departments
Aspect - (CORRECT ANSWER)Compass direction toward which a slope faces
Slope - (CORRECT ANSWER)- Natural or artificial topographic incline; degree of deviation from horizontal
- fires typically move faster going uphill than downhill
- flames are closer to the fuel dehydrating, preheating, and igniting them sooner
- wind currents normally move uphill during the day and tend to push heat and flames toward new fuels
- upslope fires create a draft, increasing the ROS
Barrier - (CORRECT ANSWER)Any obstruction of the spread of fire; typically an area or strip devoid of
combustible fuel
Fireline Intensity - (CORRECT ANSWER)Rate of heat energy released per unit time per unit length of fire
front. Numerically, it is the product of the heat of combustion, quantity of fuel consumed in the fire
front, and the rate of spread of a fire in Btu per second per foot (kilojoules per second per meter) of fire
front
1
,Rate of Spread (ROS) - (CORRECT ANSWER)relative activity of a fire in extending its horizontal
dimensions. expressed as rate of increase of the total perimeter of a fire, as rate of forward spread of
the fire front, or as rate of increase in area, depending on the intended use of the information. usually
expressed in chains or acres per hour for a specific period in the fire's history
North Facing Slopes - (CORRECT ANSWER)tend to have more shade. as a result north facing slopes have
heavier fuels, lower temperatures, higher humidity, and higher fuel moistures. a north facing aspect will
have less fire activity than a south facing slope
East Facing Slopes - (CORRECT ANSWER)eastern and southern slope exposures have about equal solar
heating as the sun moves across the sky from east to west. with sunrise, east facing slopes will have
earlier heating, but also earlier cooling as the sun tracks across the sky
West Facing Slopes - (CORRECT ANSWER)similar to eastern and southeastern slopes, southwestern, and
western slops exposures have about equal solar heating as the sun moves across the sky from east to
west. west facing slopes will have later heating and cooling during the course of the day
South Facing Slopes - (CORRECT ANSWER)in the northern hemisphere, the slopes facing south receive
direct sun rays and become hotter than slopes facing any other direction. the higher temp on the
souther exposures results in lower humidity, rapid loss of fuel and soil moisture, and drier, lighter flashy
fuels such as grass. all of these things make southern slops more susceptible to fires than northern
slopes
Concerns of Downhill Burning - (CORRECT ANSWER)- serious concern is the possibility of burning
material rolling downhill, which can ignite fuels below starting another fire
- fighting fires on a steep slope demands your undivided attention
Safety Zone - (CORRECT ANSWER)recently burned area or one cleared of vegetation used for escape in
the event a line is outflanked or a spot fire outside a control line renders the line unsafe. in firing
operations, crews progress so as to maintain a safety zone close at hand, allowing the fuels inside the
control line to be consumed before going ahead. sometimes called safety island or safe refuge
2
, Escape Routes - (CORRECT ANSWER)pathway to safety. it can lead to an already burned area, a
previously constructed safety area, a meadow that will not burn, or natural rocky area that is large
enough to take refuge without being burned. when escape routes deviate from a defined physical path,
they must be clearly marked
Slope Measurement - (CORRECT ANSWER)- "rise over run"
1.) measure the amount of vertical elevation change
2.) divide that number by the horizontal distance
3.) the change the final number into a percent, multiply by 100
Saddle - (CORRECT ANSWER)depression or pass in a ridgeline; low area on a ridgeline between two
higher points
Chute - (CORRECT ANSWER)a steep V-shaped drainage and a saddle is a common name for the
depression between two adjacent hilltops
Chutes and Saddles Can? - (CORRECT ANSWER)- drastically accelerate fires
- alter the flow of winds causing erratic fire behavior
- change the rate and direction of spread by acting as chimneys
Chimneys - (CORRECT ANSWER)steep, narrow draws or canyons in which heated air rises rapidly as it
would in a flue pipe
Box Canyons - (CORRECT ANSWER)fires starting near the base of box canyons and narrow canyons may
react 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 rapid fire spread up the canyon, also
referred to as the chimney effect
3
Correct Answers (Already Graded A+) | Verified Answers | Latest Version
Wildland Fire - (CORRECT ANSWER)Unplanned and unwanted fire requiring suppression action; an
uncontrolled fire, usually spreading through vegetative fuels. These fires can threaten structures or
other improvements
Fire Behavior - (CORRECT ANSWER)Manner in which a fire reacts to the variables of fuel, weather, and
topography
Topography - (CORRECT ANSWER)Land surface configuration
Crew - (CORRECT ANSWER)Organized group of firefighters under the leadership of a crew leader or
other designated supervisor; sometimes referred to as a "company" in municipal departments
Aspect - (CORRECT ANSWER)Compass direction toward which a slope faces
Slope - (CORRECT ANSWER)- Natural or artificial topographic incline; degree of deviation from horizontal
- fires typically move faster going uphill than downhill
- flames are closer to the fuel dehydrating, preheating, and igniting them sooner
- wind currents normally move uphill during the day and tend to push heat and flames toward new fuels
- upslope fires create a draft, increasing the ROS
Barrier - (CORRECT ANSWER)Any obstruction of the spread of fire; typically an area or strip devoid of
combustible fuel
Fireline Intensity - (CORRECT ANSWER)Rate of heat energy released per unit time per unit length of fire
front. Numerically, it is the product of the heat of combustion, quantity of fuel consumed in the fire
front, and the rate of spread of a fire in Btu per second per foot (kilojoules per second per meter) of fire
front
1
,Rate of Spread (ROS) - (CORRECT ANSWER)relative activity of a fire in extending its horizontal
dimensions. expressed as rate of increase of the total perimeter of a fire, as rate of forward spread of
the fire front, or as rate of increase in area, depending on the intended use of the information. usually
expressed in chains or acres per hour for a specific period in the fire's history
North Facing Slopes - (CORRECT ANSWER)tend to have more shade. as a result north facing slopes have
heavier fuels, lower temperatures, higher humidity, and higher fuel moistures. a north facing aspect will
have less fire activity than a south facing slope
East Facing Slopes - (CORRECT ANSWER)eastern and southern slope exposures have about equal solar
heating as the sun moves across the sky from east to west. with sunrise, east facing slopes will have
earlier heating, but also earlier cooling as the sun tracks across the sky
West Facing Slopes - (CORRECT ANSWER)similar to eastern and southeastern slopes, southwestern, and
western slops exposures have about equal solar heating as the sun moves across the sky from east to
west. west facing slopes will have later heating and cooling during the course of the day
South Facing Slopes - (CORRECT ANSWER)in the northern hemisphere, the slopes facing south receive
direct sun rays and become hotter than slopes facing any other direction. the higher temp on the
souther exposures results in lower humidity, rapid loss of fuel and soil moisture, and drier, lighter flashy
fuels such as grass. all of these things make southern slops more susceptible to fires than northern
slopes
Concerns of Downhill Burning - (CORRECT ANSWER)- serious concern is the possibility of burning
material rolling downhill, which can ignite fuels below starting another fire
- fighting fires on a steep slope demands your undivided attention
Safety Zone - (CORRECT ANSWER)recently burned area or one cleared of vegetation used for escape in
the event a line is outflanked or a spot fire outside a control line renders the line unsafe. in firing
operations, crews progress so as to maintain a safety zone close at hand, allowing the fuels inside the
control line to be consumed before going ahead. sometimes called safety island or safe refuge
2
, Escape Routes - (CORRECT ANSWER)pathway to safety. it can lead to an already burned area, a
previously constructed safety area, a meadow that will not burn, or natural rocky area that is large
enough to take refuge without being burned. when escape routes deviate from a defined physical path,
they must be clearly marked
Slope Measurement - (CORRECT ANSWER)- "rise over run"
1.) measure the amount of vertical elevation change
2.) divide that number by the horizontal distance
3.) the change the final number into a percent, multiply by 100
Saddle - (CORRECT ANSWER)depression or pass in a ridgeline; low area on a ridgeline between two
higher points
Chute - (CORRECT ANSWER)a steep V-shaped drainage and a saddle is a common name for the
depression between two adjacent hilltops
Chutes and Saddles Can? - (CORRECT ANSWER)- drastically accelerate fires
- alter the flow of winds causing erratic fire behavior
- change the rate and direction of spread by acting as chimneys
Chimneys - (CORRECT ANSWER)steep, narrow draws or canyons in which heated air rises rapidly as it
would in a flue pipe
Box Canyons - (CORRECT ANSWER)fires starting near the base of box canyons and narrow canyons may
react 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 rapid fire spread up the canyon, also
referred to as the chimney effect
3
