S-290 Q&A
Name the 5 weather factors that effect fire behavior. (WARPT) - (correct
answer)Windspeed and direction
Atmospheric stability
Relative Humidity
Precipitation
Temperature
Name the 5 topographic factors that affect fire behavior - (correct answer)Elevation
Position on slope
Aspect
Shape of the country
Steepness of slope
Name the 7 fuel factors that effect fire behavior - (correct answer)Fuel loading
Size and shape
Compactness
Horizontal continuity
Vertical continuity
Chemical content
Fuel moisture and Fuel temperature
Which of the three components of fire enviornment, changes most rapidly over time and
space? - (correct answer)Weather
Which of the three components of the fire enviornment is the least variable? - (correct
answer)Topography
,Which fuel characteristics vary rapidly over time and space? - (correct answer)Fuel
moisture and Fuel temperature
The form of heat transfer that has the most influence on the rate of spread in a ground
fire is... - (correct answer)Conduction
These fires are difficult to extinguish and have smoldering or creeping fire behavior -
(correct answer)Ground Fires
What form of heat transfer has the most influence on rate of spread in a backing fire? -
(correct answer)Radiation
3 ways convection energy can spread a fire - (correct answer)1. Cause spot fires
2. Preheat fuels through air and increased direct flame contact
3. Increase the amount of oxygen introduced on a fire
What form of heat transfer has the most influence on tree limbs - (correct
answer)Convection
List three forms of mass transport of firebrands on wildland fires - (correct answer)1.
Convection
2. Wind
3. Gravity
Give 3 examples of fire brands affected by gravity - (correct answer)1. pine cones
2. yuccas
3. logs
, Three requirements for long range spotting - (correct answer)1. Strong convective
influence to create fire brands
2. High winds to spread the fire brands
3. A receptive fuel bed
Define Flamelength - (correct answer)The distant measured from the tip of the flame to
the middle of the flaming zone at base of fire.
Where do fire behavior predictions describe the average flame length? - (correct
answer)Head of the fire/flamefront
Flame length is a visual indicator of - (correct answer)Fireline intensity/ BTU per foot per
second
6 Primary fuel factors that affect ignition of a wildland fire - (correct answer)1. moisture
2. size and
3. shape
4. arrangement
5. compactness
6. temperature
BTU per foot per second, rate of energy release, indicated by flame length, and
represents the ead output at the flame front is.... - (correct answer)Fireline Inensity
A chain is - (correct answer)66 feet
1 Mile equals how many chains - (correct answer)80 chains
How many square chains in an acre - (correct answer)10 sq. chains
Name the 5 weather factors that effect fire behavior. (WARPT) - (correct
answer)Windspeed and direction
Atmospheric stability
Relative Humidity
Precipitation
Temperature
Name the 5 topographic factors that affect fire behavior - (correct answer)Elevation
Position on slope
Aspect
Shape of the country
Steepness of slope
Name the 7 fuel factors that effect fire behavior - (correct answer)Fuel loading
Size and shape
Compactness
Horizontal continuity
Vertical continuity
Chemical content
Fuel moisture and Fuel temperature
Which of the three components of fire enviornment, changes most rapidly over time and
space? - (correct answer)Weather
Which of the three components of the fire enviornment is the least variable? - (correct
answer)Topography
,Which fuel characteristics vary rapidly over time and space? - (correct answer)Fuel
moisture and Fuel temperature
The form of heat transfer that has the most influence on the rate of spread in a ground
fire is... - (correct answer)Conduction
These fires are difficult to extinguish and have smoldering or creeping fire behavior -
(correct answer)Ground Fires
What form of heat transfer has the most influence on rate of spread in a backing fire? -
(correct answer)Radiation
3 ways convection energy can spread a fire - (correct answer)1. Cause spot fires
2. Preheat fuels through air and increased direct flame contact
3. Increase the amount of oxygen introduced on a fire
What form of heat transfer has the most influence on tree limbs - (correct
answer)Convection
List three forms of mass transport of firebrands on wildland fires - (correct answer)1.
Convection
2. Wind
3. Gravity
Give 3 examples of fire brands affected by gravity - (correct answer)1. pine cones
2. yuccas
3. logs
, Three requirements for long range spotting - (correct answer)1. Strong convective
influence to create fire brands
2. High winds to spread the fire brands
3. A receptive fuel bed
Define Flamelength - (correct answer)The distant measured from the tip of the flame to
the middle of the flaming zone at base of fire.
Where do fire behavior predictions describe the average flame length? - (correct
answer)Head of the fire/flamefront
Flame length is a visual indicator of - (correct answer)Fireline intensity/ BTU per foot per
second
6 Primary fuel factors that affect ignition of a wildland fire - (correct answer)1. moisture
2. size and
3. shape
4. arrangement
5. compactness
6. temperature
BTU per foot per second, rate of energy release, indicated by flame length, and
represents the ead output at the flame front is.... - (correct answer)Fireline Inensity
A chain is - (correct answer)66 feet
1 Mile equals how many chains - (correct answer)80 chains
How many square chains in an acre - (correct answer)10 sq. chains
