S-190 Final Exam QuEStionS With
ComplEtE SolutionS | latESt updatE
2025 | SurE to paSS!!
1. What is another concern about steep slopes? - ANSWER ✔ The
possibility of burning material rolling down the hill and igniting fuel
below the main fire.
2. What does direct sunlight and hot temperatures in the wild land fire
environment do to fuels? - ANSWER ✔ It preheats them and brings
them closer to their ignition point.
3. Relative Humidity - ANSWER ✔ the amount of moisture in the air
divided by the amount the air could hold when saturated at the same
air temperature; expressed in percent.
4. Low relative humidity is an indicator of what? - ANSWER ✔ high
fire danger
5. Temperature and relative humidity have what kind of relationship? -
ANSWER ✔ Inverse
,6. When temperature increases, relative humidity...
When temperature decreases, relative humidity... - ANSWER ✔
decreases
increases
7. What do we use to measure relative humidity - ANSWER ✔ Sling
psychrometer
8. The degree to which vertical motion in the atmosphere is enhanced or
suppressed. - ANSWER ✔ Atmospheric stability
9. What is Stability directly related to? - ANSWER ✔ the temperature
distribution of the atmosphere
10. An atmosphere that resists upward motion - ANSWER ✔ stable
atmosphere
11. Indicators of a stable Atmosphere - ANSWER ✔ clouds in layers
stratus type clouds
smoke column drifts apart after limited rise
poor visibility due to smoke or haze
fog layers
steady winds
, 12. Warm air OVER Cold air = - ANSWER ✔ Inversion (stable
condition)
13. Wildland fire behavior increases when inversions... - ANSWER ✔
break or lift
14. Indicators when an inversion breaks - ANSWER ✔ Increase in
temperature
Decrease in relative humidity
Increase and/or shift in wind
15. Four types of inversions: - ANSWER ✔ Nighttime (radiation)
Subsidence
Frontal
Marine
16. 2 Types of inversions most common in the wild land fire
environment: - ANSWER ✔ Nighttime and subsidence
17. What type of Inversion happens when air is cooled at night,
primarily by contact with cold surfaces, and gradually deepens as the
night progresses - ANSWER ✔ Nighttime Inversion
ComplEtE SolutionS | latESt updatE
2025 | SurE to paSS!!
1. What is another concern about steep slopes? - ANSWER ✔ The
possibility of burning material rolling down the hill and igniting fuel
below the main fire.
2. What does direct sunlight and hot temperatures in the wild land fire
environment do to fuels? - ANSWER ✔ It preheats them and brings
them closer to their ignition point.
3. Relative Humidity - ANSWER ✔ the amount of moisture in the air
divided by the amount the air could hold when saturated at the same
air temperature; expressed in percent.
4. Low relative humidity is an indicator of what? - ANSWER ✔ high
fire danger
5. Temperature and relative humidity have what kind of relationship? -
ANSWER ✔ Inverse
,6. When temperature increases, relative humidity...
When temperature decreases, relative humidity... - ANSWER ✔
decreases
increases
7. What do we use to measure relative humidity - ANSWER ✔ Sling
psychrometer
8. The degree to which vertical motion in the atmosphere is enhanced or
suppressed. - ANSWER ✔ Atmospheric stability
9. What is Stability directly related to? - ANSWER ✔ the temperature
distribution of the atmosphere
10. An atmosphere that resists upward motion - ANSWER ✔ stable
atmosphere
11. Indicators of a stable Atmosphere - ANSWER ✔ clouds in layers
stratus type clouds
smoke column drifts apart after limited rise
poor visibility due to smoke or haze
fog layers
steady winds
, 12. Warm air OVER Cold air = - ANSWER ✔ Inversion (stable
condition)
13. Wildland fire behavior increases when inversions... - ANSWER ✔
break or lift
14. Indicators when an inversion breaks - ANSWER ✔ Increase in
temperature
Decrease in relative humidity
Increase and/or shift in wind
15. Four types of inversions: - ANSWER ✔ Nighttime (radiation)
Subsidence
Frontal
Marine
16. 2 Types of inversions most common in the wild land fire
environment: - ANSWER ✔ Nighttime and subsidence
17. What type of Inversion happens when air is cooled at night,
primarily by contact with cold surfaces, and gradually deepens as the
night progresses - ANSWER ✔ Nighttime Inversion
