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S-290 Final Exam Questions and Answers with
Complete Solutions UPDATED!!!
T/F Topography can directly and indirectly affect fuels and their
availability for combustion. - ANSWER True
Of the three primary environmental factors that influence fire
behavior, which is the least variable? - ANSWER Topography
The least critical form of heat transfer that influences rate of
spread in a running wild land fire is: - ANSWER Conduction
The point to which a combustible material must be heated to
produce self-sustaining combustion is known as the: - ANSWER
Ignition temperature
Fireline intensity is dependent upon: - ANSWER All of the
above.
Fuel size
Fuel moisture
Fuel temperature
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Fuel compactness and arrangement
T/F Two requirements for long range spotting are wind and a
well developed convection column. - ANSWER True
A fire that advances through canopies of brush and trees is
known as a: - ANSWER Crown fire
Fire is burning in litter on top of the ground, but occasionally
carries into the crowns of individual trees, which produces
burning embers that start new fires outside the fire perimeter. -
ANSWER Surface fire with torching and spotting.
Fire begins burning into the crowns and spreads through the
canopy. There is a sudden increase in fireline intensity where
the fire controls it's environment. At one point flames can be
seen carried high into the convection column with a whirling
motion. - ANSWER Ground fire with smoldering and flare ups.
T/F Upward moving air contracts and warms. - ANSWER False
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As air sinks, it. - ANSWER Increases in pressure, warms and
compresses.
Why do dry climates usually have lower nighttime temperatures
than humid climates? - ANSWER Because there is less water
vapor in the air to absorb and reflect heat back to the surface at
night.
T/F On average the RH doubles with each 20F decrease of
temperature, or halves with each 20F increase in temperature. -
ANSWER True
T/F The lowest RH occurs with the highest temperature. -
ANSWER True
T/F RH is usually lower on north aspects. - ANSWER False
T/F Cloudiness has little affect on relative humidity and
temperature. - ANSWER False
S-290 Final Exam Questions and Answers with
Complete Solutions UPDATED!!!
T/F Topography can directly and indirectly affect fuels and their
availability for combustion. - ANSWER True
Of the three primary environmental factors that influence fire
behavior, which is the least variable? - ANSWER Topography
The least critical form of heat transfer that influences rate of
spread in a running wild land fire is: - ANSWER Conduction
The point to which a combustible material must be heated to
produce self-sustaining combustion is known as the: - ANSWER
Ignition temperature
Fireline intensity is dependent upon: - ANSWER All of the
above.
Fuel size
Fuel moisture
Fuel temperature
,2|Page
Fuel compactness and arrangement
T/F Two requirements for long range spotting are wind and a
well developed convection column. - ANSWER True
A fire that advances through canopies of brush and trees is
known as a: - ANSWER Crown fire
Fire is burning in litter on top of the ground, but occasionally
carries into the crowns of individual trees, which produces
burning embers that start new fires outside the fire perimeter. -
ANSWER Surface fire with torching and spotting.
Fire begins burning into the crowns and spreads through the
canopy. There is a sudden increase in fireline intensity where
the fire controls it's environment. At one point flames can be
seen carried high into the convection column with a whirling
motion. - ANSWER Ground fire with smoldering and flare ups.
T/F Upward moving air contracts and warms. - ANSWER False
, 3|Page
As air sinks, it. - ANSWER Increases in pressure, warms and
compresses.
Why do dry climates usually have lower nighttime temperatures
than humid climates? - ANSWER Because there is less water
vapor in the air to absorb and reflect heat back to the surface at
night.
T/F On average the RH doubles with each 20F decrease of
temperature, or halves with each 20F increase in temperature. -
ANSWER True
T/F The lowest RH occurs with the highest temperature. -
ANSWER True
T/F RH is usually lower on north aspects. - ANSWER False
T/F Cloudiness has little affect on relative humidity and
temperature. - ANSWER False
