S-290 Unit 1: The Fire Environment questions with
verified answers
3 component so of the fire triangle Ans✓✓✓ heat, oxygen, fuel
3 components of the fire environment Ans✓✓✓ weather, topography, and fuels
3 factors influencing vertical development of a fire's convective smoke column
Ans✓✓✓ Fire intensity
Stability in the lower atmosphere
Winds aloft
3 methods of transport of firebrands Ans✓✓✓ Convection
Wind
Gravity
Closed fire environment Ans✓✓✓ A sheltered environment (for example, a fire
burning under a forest canopy)
Conduction Ans✓✓✓ The transfer of heat from one molecule of matter to
another (direct contact)
Convection Ans✓✓✓ The transfer of heat by the motion of air (or any other fluid)
Crown fire Ans✓✓✓ A fire that burns in the elevated canopy fuels
, Elements of fuel that influence fire behavior Ans✓✓✓ Fuel loading
Size and shape
Compactness
Horizontal continuity
Vertical continuity
Chemical content
Fuel moisture and temperature
Elements of topography that influence fire behavior Ans✓✓✓ Elevation
Position on slope
Aspect
Shape of the terrain
Steepness of slope
Elements of weather that influence fire behavior Ans✓✓✓ Temperature
Relative humidity
Atmospheric stability
Wind speed and direction
Precipitation
Field conditions affecting the spread pattern of wildfires Ans✓✓✓
Heterogeneous fuel complexes that cause fingering
Barriers that stop or partially stop the spread
The effect of slope reducing or increasing fire spread at the head or flanks
Spotting ahead of or down slope from a fire
verified answers
3 component so of the fire triangle Ans✓✓✓ heat, oxygen, fuel
3 components of the fire environment Ans✓✓✓ weather, topography, and fuels
3 factors influencing vertical development of a fire's convective smoke column
Ans✓✓✓ Fire intensity
Stability in the lower atmosphere
Winds aloft
3 methods of transport of firebrands Ans✓✓✓ Convection
Wind
Gravity
Closed fire environment Ans✓✓✓ A sheltered environment (for example, a fire
burning under a forest canopy)
Conduction Ans✓✓✓ The transfer of heat from one molecule of matter to
another (direct contact)
Convection Ans✓✓✓ The transfer of heat by the motion of air (or any other fluid)
Crown fire Ans✓✓✓ A fire that burns in the elevated canopy fuels
, Elements of fuel that influence fire behavior Ans✓✓✓ Fuel loading
Size and shape
Compactness
Horizontal continuity
Vertical continuity
Chemical content
Fuel moisture and temperature
Elements of topography that influence fire behavior Ans✓✓✓ Elevation
Position on slope
Aspect
Shape of the terrain
Steepness of slope
Elements of weather that influence fire behavior Ans✓✓✓ Temperature
Relative humidity
Atmospheric stability
Wind speed and direction
Precipitation
Field conditions affecting the spread pattern of wildfires Ans✓✓✓
Heterogeneous fuel complexes that cause fingering
Barriers that stop or partially stop the spread
The effect of slope reducing or increasing fire spread at the head or flanks
Spotting ahead of or down slope from a fire
