S-290 EXAM
________ is heat transferred through direct flame contact - answer Conduction
You observe fire flanking 10 feet 30 seconds. What is the ROS of the fire in chains per
hour? - answer20 chains per hour
How many square chains equal an acre? - answer10
Identify how many feet are in a chain. - answer66 feet
Combustion is the opposite of ? - answer Photosynthesis
What are the three sides of the Fire Behavior Triangle? - answer Fuel, weather, and
topography
What are the four phases of combustion? – answer Preignition, ignition, combustion,
and extinction
You observe fire backing 0.5 feet a minute. What is the ROS of the fire in chains per
hour? - answer0.5 ch/hr
You observe fire heading 30 feet 15 seconds. What is the ROS of the fire in chains per
hour? - answer110
The method of heat transfer by the movement of a gas or liquid is known as what? -
answerConvection
How can a ridge affect fire behavior? - answerStronger more erratic winds because of
increased exposure and eddying
Which aspect heats and cools the latest in the day in the northern hemisphere? -
answerWest
What are the characteristics of a southern aspect in the Northern hemisphere? -
answerHighest average temperature and generally finer fuels and Lowest average RH
What position of the slope has the highest potential for fire growth? - answerLower
Why does slope influence fire behavior? - answerThe steeper the slope the more
convective heat pre-treats fuels
, What are the three purposes of a topographic map? - answerNavigation, planning,
communication
True statements about contour lines - answerIndex contour lines are darker, they
always form a circle,
What is the chimney effect? - answerFire burning in a steep narrow canyon where fire is
funneled upward.
You are the IC of a type 5 fire that is picking up in activity. You will be converting it to a
type 4 fire soon. There are homes uphill from the fire several miles but you would like to
see what the expected rate of spread is in the direction of the homes. The homes are 2
miles from your location. You are at an elevation of 1,200 ft and the homes are at 3,800
ft. What is the average slope in the direction of the homes? - answer25%
What are the ranges of dead fuel moisture content? - answer2% to 30%
Canopy cover - answerAffects the movement of fire from crown
Canopy base height - answeraffects the transition of the fire into the crown
Canopy bulk density - answerAffects the intensity of the fire in the canopy
What are the 8 principal fuel characteristics? - answerQuantity, size and shape, depth,
compactness, arrangement, continuity, moisture content
What is true of more compact fuels? - answerless oxygen access, and fire moves slowly
Available fuels are a portion of the total fuel that would burn under various
environmental conditions or that did burn during combustion - answerTrue
What is the most important factor to consider when selecting a fire behavior fuel model?
- answerExpected fire behavior
The moisture of extinction is different depending on the vegetation type. - answerTrue
What is the primary reason why SAV is an important concept for wildland fuels -
answerIt will help you understand how quickly the fuels dry
What are the indirect environmental factors influencing fuel moisture? -
answerElevation, shading, aspect, and slope
What is fire regime? - answerThe pattern of fire over time
As the density goes up in a parcel of air, the temperature of the air ___________. -
answerIncreases
________ is heat transferred through direct flame contact - answer Conduction
You observe fire flanking 10 feet 30 seconds. What is the ROS of the fire in chains per
hour? - answer20 chains per hour
How many square chains equal an acre? - answer10
Identify how many feet are in a chain. - answer66 feet
Combustion is the opposite of ? - answer Photosynthesis
What are the three sides of the Fire Behavior Triangle? - answer Fuel, weather, and
topography
What are the four phases of combustion? – answer Preignition, ignition, combustion,
and extinction
You observe fire backing 0.5 feet a minute. What is the ROS of the fire in chains per
hour? - answer0.5 ch/hr
You observe fire heading 30 feet 15 seconds. What is the ROS of the fire in chains per
hour? - answer110
The method of heat transfer by the movement of a gas or liquid is known as what? -
answerConvection
How can a ridge affect fire behavior? - answerStronger more erratic winds because of
increased exposure and eddying
Which aspect heats and cools the latest in the day in the northern hemisphere? -
answerWest
What are the characteristics of a southern aspect in the Northern hemisphere? -
answerHighest average temperature and generally finer fuels and Lowest average RH
What position of the slope has the highest potential for fire growth? - answerLower
Why does slope influence fire behavior? - answerThe steeper the slope the more
convective heat pre-treats fuels
, What are the three purposes of a topographic map? - answerNavigation, planning,
communication
True statements about contour lines - answerIndex contour lines are darker, they
always form a circle,
What is the chimney effect? - answerFire burning in a steep narrow canyon where fire is
funneled upward.
You are the IC of a type 5 fire that is picking up in activity. You will be converting it to a
type 4 fire soon. There are homes uphill from the fire several miles but you would like to
see what the expected rate of spread is in the direction of the homes. The homes are 2
miles from your location. You are at an elevation of 1,200 ft and the homes are at 3,800
ft. What is the average slope in the direction of the homes? - answer25%
What are the ranges of dead fuel moisture content? - answer2% to 30%
Canopy cover - answerAffects the movement of fire from crown
Canopy base height - answeraffects the transition of the fire into the crown
Canopy bulk density - answerAffects the intensity of the fire in the canopy
What are the 8 principal fuel characteristics? - answerQuantity, size and shape, depth,
compactness, arrangement, continuity, moisture content
What is true of more compact fuels? - answerless oxygen access, and fire moves slowly
Available fuels are a portion of the total fuel that would burn under various
environmental conditions or that did burn during combustion - answerTrue
What is the most important factor to consider when selecting a fire behavior fuel model?
- answerExpected fire behavior
The moisture of extinction is different depending on the vegetation type. - answerTrue
What is the primary reason why SAV is an important concept for wildland fuels -
answerIt will help you understand how quickly the fuels dry
What are the indirect environmental factors influencing fuel moisture? -
answerElevation, shading, aspect, and slope
What is fire regime? - answerThe pattern of fire over time
As the density goes up in a parcel of air, the temperature of the air ___________. -
answerIncreases
