S-290 EXAM STUDY GUIDE 2026
COMPLETE QUESTIONS AND ANSWERS
◉T/F
Unstable air can be formed by either heating the air near the ground
or by cooling the air aloft. Answer: True
◉How is wind direction described?. Answer: Wind direction is
named by the direction wind is blowing *FROM*
◉A slope wind is caused by. Answer: Warm air rising and cold air
settling
◉Stable/Unstable;
Gusty winds. Answer: Unstable
◉Stable/Unstable;
, Smoke column spreads out after limited rise. Answer: Stable
◉Stable/Unstable
Clouds grow vertically. Answer: Unstable
◉Stable/Unstable
Fire brands are lifted into convection column. Answer: Unstable
◉When comparing pressure, The pressure at higher altitudes is
____________ than it is at lower altitudes. Answer: Lower
◉Temperature decreases with an increase in elevation when an
inversion is present. Answer: False. Temperatures increase with
elevation during an inversion.
◉What is the general effect of stable air on wildland fires. Answer:
Fire activity decreases
◉What columns will occur under a surface inversion during the
morning hours. Answer: Temperatures are cool, winds are calm or
light
COMPLETE QUESTIONS AND ANSWERS
◉T/F
Unstable air can be formed by either heating the air near the ground
or by cooling the air aloft. Answer: True
◉How is wind direction described?. Answer: Wind direction is
named by the direction wind is blowing *FROM*
◉A slope wind is caused by. Answer: Warm air rising and cold air
settling
◉Stable/Unstable;
Gusty winds. Answer: Unstable
◉Stable/Unstable;
, Smoke column spreads out after limited rise. Answer: Stable
◉Stable/Unstable
Clouds grow vertically. Answer: Unstable
◉Stable/Unstable
Fire brands are lifted into convection column. Answer: Unstable
◉When comparing pressure, The pressure at higher altitudes is
____________ than it is at lower altitudes. Answer: Lower
◉Temperature decreases with an increase in elevation when an
inversion is present. Answer: False. Temperatures increase with
elevation during an inversion.
◉What is the general effect of stable air on wildland fires. Answer:
Fire activity decreases
◉What columns will occur under a surface inversion during the
morning hours. Answer: Temperatures are cool, winds are calm or
light