S-290 FINAL EXAM NEWEST 2024 ACTUAL EXAM 2
VERSIONS (VERSION A AND B) COMPLETE 300
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+
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
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
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
T/F The type of vegetation has little affect on temperature and humidity. - ANSWER:
False
T/F RH measures the amount of moisture in the air. - ANSWER: True
S/U Clouds form in layers. - ANSWER: Stable
S/U Gusty winds - ANSWER: Unstable
S/U Smoke column spreads out after limited rise. - ANSWER: Stable
S/U Clouds grow vertically - ANSWER: Unstable
S/U Firebrands are lifted into convection column. - ANSWER: Unstable
T/F Temperature decreases with an increase in elevation when an inversion is
present. - ANSWER: False
What is the general effect of stable air on wild land fires? - ANSWER: Fire activity
decreases
What conditions will occur under a surface inversion during the morning hours? -
ANSWER: All of the above
Temperatures are cool, winds are calm or light
Fire activity is decreased
Pollutants can accumulate under inversions
What are the different lighting processes that can lead to thunderstorm
development? - ANSWER: Frontal, orographic, thermal, convergence
T/F Unstable air can often be found in low pressure systems and on the leading edge
of cold fronts. - ANSWER: True
T/F Unstable air can be formed by either heating the air near the ground or by
cooling the air aloft. - ANSWER: True
VERSIONS (VERSION A AND B) COMPLETE 300
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+
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
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
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
T/F The type of vegetation has little affect on temperature and humidity. - ANSWER:
False
T/F RH measures the amount of moisture in the air. - ANSWER: True
S/U Clouds form in layers. - ANSWER: Stable
S/U Gusty winds - ANSWER: Unstable
S/U Smoke column spreads out after limited rise. - ANSWER: Stable
S/U Clouds grow vertically - ANSWER: Unstable
S/U Firebrands are lifted into convection column. - ANSWER: Unstable
T/F Temperature decreases with an increase in elevation when an inversion is
present. - ANSWER: False
What is the general effect of stable air on wild land fires? - ANSWER: Fire activity
decreases
What conditions will occur under a surface inversion during the morning hours? -
ANSWER: All of the above
Temperatures are cool, winds are calm or light
Fire activity is decreased
Pollutants can accumulate under inversions
What are the different lighting processes that can lead to thunderstorm
development? - ANSWER: Frontal, orographic, thermal, convergence
T/F Unstable air can often be found in low pressure systems and on the leading edge
of cold fronts. - ANSWER: True
T/F Unstable air can be formed by either heating the air near the ground or by
cooling the air aloft. - ANSWER: True
