S-290 final exam 2025
List three methods of mass transport of firebrands on wild land fires. - answer
CONVECTION, WIND, GRAVITY
In an unstable atmosphere: - answer A and B
Describe how convection influences transport of firebrands. – answer A CONVECTION
COLUMN CAN LIFT FIREBRANDS ABOVE THE FIRE, WHERE THE WIND CAN
CARRY IT AHEAD OF THE FIRE
The primary factors that affect rate of spread are: - answer Changes in fuel type, wind
speed, and steepness of slope.
Which of the following changes would be expected to produce the largest change in
ROS? - answerA slope reversal with a 6 mph wind blowing at one slope
The four fuel factors that affect the ignition of wildland fires are: - answerSize and shape
of fuels, compactness or arrangement of fuels, fuel moisture, and fuel temperature.
Define fuel moisture content. - answer FUEL MOISTURE CONTENT IS THE AMOUNT
OF WATER IN A FUEL, EXPRESSED AS A PERCENT OF THE OVEN DRY WEIGHT
OF THAT FUEL
The Fire Weather Planning Forecasts, Spot Forecasts, Red Flag Warnings, and Smoke
Management Forecasts are products issued by: - answerThe National Weather Service
Which one or more of the following statements are correct regarding wind driven and
plume dominated fires. - answerWind driven fires are easier to predict the direction of
spread.
List three methods used in the field to determine slope percent. - answerTHE STICK
METHOD, A CLINOMETER, AND A GPS
Upslope winds are typically weakest on what aspect? - answerNorth
The three stages of crown fire development include: - answerPassive, active, and
independent
Slope affects fuel availability to burn because: - answerA and B.
Describe the difference between Fuel Group and Fuel Model. - answerA FUEL MODEL
IS A SIMPLIFIED MATHMATICAL REPRESENTATION OF FUELS IN THE REAL
, WORLD. A FUEL GROUP IS A GROUPING OF FUEL MODELS THAT SHARE
SIMILAR CHARACTERISTICS
Which of the following topographic variations in wind speed would you expect on a
sunny summer afternoon? - answerTime of day, month of year, dry bulb temperature,
relative humidity, aspect, percent slope, shading of surface fuels.
Inputs used to determine fine dead fuel moisture content are: - answerTime of day,
month of year, dry bulb temperature, relative humidity, aspect, percent slope, shading of
surface fuels.
General winds are: - answerLarge-scale winds caused by the pressure gradients
associated with highs and lows
If the wet bulb is not read at its lowest point on a psychrometer: - answerThe calculated
relative humidity will be too high.
List three fire behavior situations that often result in large, sudden changes in fire
behavior. - answerSUDDEN CHANGE IN WIND, FUEL TYPE, OR TOPOGRAPHY
Branches above the fire are receiving heat by: - answerRadiation and convection
Relative humidity is: - answerA ratio of the amount of water vapor in the air to the
amount of water vapor the air could hold when saturated at the same temperature.
Define moisture of extinction. - answerTHE MOISTURE OF EXTINCTION IS THE FUEL
MOISTURE CONTENT AT WHICH A FIRE WILL NOT SPREAD, OR SPREADS ONLY
SPORADICALLY
Select the correct statement regarding the shape of the country and its effect on
wildland fire behavior. - answerThe shape of the country can influence the curing of
fuels as well as the intensity and spread of wildland fires.
Select the statement that best describes the effect of slope on fuels. - answerA and C.
Of the three methods for obtaining live fuel moistures, the following produces the most
accurate results: - answerCollecting samples, weighing them, drying them and then
weighing them again.
List in order the three main fuel types from slowest typical ROS to fastest typical ROS. -
answerLITTER, CROWN, GRASS
7-Day Significant Fire Potential, Monthly Fire Weather/Fire Danger Outlooks, and
Seasonal Assessments are all products produced by what organization? - answerLand
Management Predictive Services
List three methods of mass transport of firebrands on wild land fires. - answer
CONVECTION, WIND, GRAVITY
In an unstable atmosphere: - answer A and B
Describe how convection influences transport of firebrands. – answer A CONVECTION
COLUMN CAN LIFT FIREBRANDS ABOVE THE FIRE, WHERE THE WIND CAN
CARRY IT AHEAD OF THE FIRE
The primary factors that affect rate of spread are: - answer Changes in fuel type, wind
speed, and steepness of slope.
Which of the following changes would be expected to produce the largest change in
ROS? - answerA slope reversal with a 6 mph wind blowing at one slope
The four fuel factors that affect the ignition of wildland fires are: - answerSize and shape
of fuels, compactness or arrangement of fuels, fuel moisture, and fuel temperature.
Define fuel moisture content. - answer FUEL MOISTURE CONTENT IS THE AMOUNT
OF WATER IN A FUEL, EXPRESSED AS A PERCENT OF THE OVEN DRY WEIGHT
OF THAT FUEL
The Fire Weather Planning Forecasts, Spot Forecasts, Red Flag Warnings, and Smoke
Management Forecasts are products issued by: - answerThe National Weather Service
Which one or more of the following statements are correct regarding wind driven and
plume dominated fires. - answerWind driven fires are easier to predict the direction of
spread.
List three methods used in the field to determine slope percent. - answerTHE STICK
METHOD, A CLINOMETER, AND A GPS
Upslope winds are typically weakest on what aspect? - answerNorth
The three stages of crown fire development include: - answerPassive, active, and
independent
Slope affects fuel availability to burn because: - answerA and B.
Describe the difference between Fuel Group and Fuel Model. - answerA FUEL MODEL
IS A SIMPLIFIED MATHMATICAL REPRESENTATION OF FUELS IN THE REAL
, WORLD. A FUEL GROUP IS A GROUPING OF FUEL MODELS THAT SHARE
SIMILAR CHARACTERISTICS
Which of the following topographic variations in wind speed would you expect on a
sunny summer afternoon? - answerTime of day, month of year, dry bulb temperature,
relative humidity, aspect, percent slope, shading of surface fuels.
Inputs used to determine fine dead fuel moisture content are: - answerTime of day,
month of year, dry bulb temperature, relative humidity, aspect, percent slope, shading of
surface fuels.
General winds are: - answerLarge-scale winds caused by the pressure gradients
associated with highs and lows
If the wet bulb is not read at its lowest point on a psychrometer: - answerThe calculated
relative humidity will be too high.
List three fire behavior situations that often result in large, sudden changes in fire
behavior. - answerSUDDEN CHANGE IN WIND, FUEL TYPE, OR TOPOGRAPHY
Branches above the fire are receiving heat by: - answerRadiation and convection
Relative humidity is: - answerA ratio of the amount of water vapor in the air to the
amount of water vapor the air could hold when saturated at the same temperature.
Define moisture of extinction. - answerTHE MOISTURE OF EXTINCTION IS THE FUEL
MOISTURE CONTENT AT WHICH A FIRE WILL NOT SPREAD, OR SPREADS ONLY
SPORADICALLY
Select the correct statement regarding the shape of the country and its effect on
wildland fire behavior. - answerThe shape of the country can influence the curing of
fuels as well as the intensity and spread of wildland fires.
Select the statement that best describes the effect of slope on fuels. - answerA and C.
Of the three methods for obtaining live fuel moistures, the following produces the most
accurate results: - answerCollecting samples, weighing them, drying them and then
weighing them again.
List in order the three main fuel types from slowest typical ROS to fastest typical ROS. -
answerLITTER, CROWN, GRASS
7-Day Significant Fire Potential, Monthly Fire Weather/Fire Danger Outlooks, and
Seasonal Assessments are all products produced by what organization? - answerLand
Management Predictive Services
