S-290 Final Exam B
List 3 methods of mass transport of firebrands on wild land fires? - answer Conduction,
wind, and gravity
In an instable atmosphere: - answer Smoke will continue to rise as long as it remains
warmer than the surrounding atmosphere and air parcels both rise and sink
Describe how convection influences transport of firebrands - answer Rising heat
produced from fires can lift firebrands within the column. These firebrands can then be
deposited ahead of the fire as they fall out of the column.
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 4 fuel factors that affect the ignition of wild land fires are: - answerSize and shape
of fuels, compactness or arrangement of fuels, fuel moisture, and fuel temperature.
Define fuel moisture content: - answerThe amount of water in fuel expressed as a
percent of the oven dry weight of that fuel.
The fire weather planning forecast, 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
Plume dominated fires have similar hazards to thunderstorms
Plume dominated fires the convected column dictates the fire activity
List the 3 methods used in the field to determine slope percent: -
answerClinometer/abney, measurement using a stick propped into slope and percent
slope formula, slope meter estimate
Upslope winds are typically weakest on what aspect: - answerNorth
The 3 stages of crown fire development include: - answerPassive, active, and
dependent
List 3 methods of mass transport of firebrands on wild land fires? - answer Conduction,
wind, and gravity
In an instable atmosphere: - answer Smoke will continue to rise as long as it remains
warmer than the surrounding atmosphere and air parcels both rise and sink
Describe how convection influences transport of firebrands - answer Rising heat
produced from fires can lift firebrands within the column. These firebrands can then be
deposited ahead of the fire as they fall out of the column.
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 4 fuel factors that affect the ignition of wild land fires are: - answerSize and shape
of fuels, compactness or arrangement of fuels, fuel moisture, and fuel temperature.
Define fuel moisture content: - answerThe amount of water in fuel expressed as a
percent of the oven dry weight of that fuel.
The fire weather planning forecast, 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
Plume dominated fires have similar hazards to thunderstorms
Plume dominated fires the convected column dictates the fire activity
List the 3 methods used in the field to determine slope percent: -
answerClinometer/abney, measurement using a stick propped into slope and percent
slope formula, slope meter estimate
Upslope winds are typically weakest on what aspect: - answerNorth
The 3 stages of crown fire development include: - answerPassive, active, and
dependent
