Wildland Firefighter 1C Exam A&B ALL 300 QUESTIONS AND
CORRECT ANSWERS
EXAM A — QUESTIONS 1–150
Fire Behavior, Fuels & Weather
1. Which three elements make up the fire triangle?
A. Fuel, oxygen, heat
B. Smoke, water, wind
C. Fuel, smoke, water
D. Heat, smoke, carbon dioxide
Answer: A
Rationale: Combustion requires fuel, oxygen, and sufficient heat.
2. The transfer of heat through direct contact between materials is
called:
A. Radiation
B. Convection
C. Conduction
D. Reflection
Answer: C
Rationale: Conduction transfers heat through direct molecular contact.
3. Heat transferred by the movement of heated gases or liquids is:
A. Conduction
B. Convection
C. Radiation
D. Compression
Answer: B
,Rationale: Convection involves movement of heated fluids, including
air.
4. Heat traveling as electromagnetic energy is known as:
A. Radiation
B. Convection
C. Conduction
D. Evaporation
Answer: A
Rationale: Radiation transfers heat without requiring direct contact.
5. Which fuel generally ignites and burns most readily?
A. Large green logs
B. Fine dry grass
C. Wet soil
D. Large rocks
Answer: B
Rationale: Fine, dry fuels have a high surface-area-to-volume ratio and
respond rapidly to heat.
6. Fuel moisture generally has what effect on fire behavior?
A. Dry fuel usually burns more readily
B. Moisture always increases flame length
C. Moisture eliminates convection
D. Moisture makes all fuels burn faster
Answer: A
Rationale: Water must be heated and evaporated before moist fuel can
burn effectively.
7. Which condition normally increases the rate of fire spread?
A. High fuel moisture
,B. Stronger favorable wind
C. Heavy rain
D. Saturated soil
Answer: B
Rationale: Wind can tilt flames into unburned fuel and increase oxygen
supply and heat transfer.
8. A slope generally causes a wildland fire to spread faster uphill
because:
A. Gravity pulls flames downhill
B. Flames and heated gases preheat fuels above the fire
C. Uphill fuels contain no moisture
D. Oxygen disappears downhill
Answer: B
Rationale: Rising heat and flames warm fuels upslope before the fire
reaches them.
9. Which fuel characteristic is most important in determining how
quickly a fuel responds to heating?
A. Color
B. Surface-area-to-volume ratio
C. Mineral content alone
D. Ground elevation alone
Answer: B
Rationale: Fine fuels heat and dry rapidly because they have greater
surface area relative to their volume.
10. Which weather factor most directly affects fire spread direction?
A. Wind
B. Dew point only
, C. Cloud color
D. Barometric instrument size
Answer: A
Rationale: Wind pushes flames, embers, and heated gases and strongly
influences fire direction.
11. Relative humidity is generally:
A. The amount of smoke in the atmosphere
B. A measure of how much moisture the air contains relative to its
capacity
C. The temperature of the soil
D. The speed of wind
Answer: B
Rationale: Relative humidity expresses atmospheric moisture relative to
the amount the air could hold at that temperature.
12. As air temperature rises while moisture remains constant, relative
humidity generally:
A. Increases greatly
B. Decreases
C. Remains exactly constant
D. Becomes zero immediately
Answer: B
Rationale: Warmer air can hold more moisture, so relative humidity
decreases when moisture content remains unchanged.
13. A temperature inversion occurs when:
A. Temperature decreases with height at the normal rate
B. A layer of warmer air exists above cooler air near the surface
C. Wind stops permanently
CORRECT ANSWERS
EXAM A — QUESTIONS 1–150
Fire Behavior, Fuels & Weather
1. Which three elements make up the fire triangle?
A. Fuel, oxygen, heat
B. Smoke, water, wind
C. Fuel, smoke, water
D. Heat, smoke, carbon dioxide
Answer: A
Rationale: Combustion requires fuel, oxygen, and sufficient heat.
2. The transfer of heat through direct contact between materials is
called:
A. Radiation
B. Convection
C. Conduction
D. Reflection
Answer: C
Rationale: Conduction transfers heat through direct molecular contact.
3. Heat transferred by the movement of heated gases or liquids is:
A. Conduction
B. Convection
C. Radiation
D. Compression
Answer: B
,Rationale: Convection involves movement of heated fluids, including
air.
4. Heat traveling as electromagnetic energy is known as:
A. Radiation
B. Convection
C. Conduction
D. Evaporation
Answer: A
Rationale: Radiation transfers heat without requiring direct contact.
5. Which fuel generally ignites and burns most readily?
A. Large green logs
B. Fine dry grass
C. Wet soil
D. Large rocks
Answer: B
Rationale: Fine, dry fuels have a high surface-area-to-volume ratio and
respond rapidly to heat.
6. Fuel moisture generally has what effect on fire behavior?
A. Dry fuel usually burns more readily
B. Moisture always increases flame length
C. Moisture eliminates convection
D. Moisture makes all fuels burn faster
Answer: A
Rationale: Water must be heated and evaporated before moist fuel can
burn effectively.
7. Which condition normally increases the rate of fire spread?
A. High fuel moisture
,B. Stronger favorable wind
C. Heavy rain
D. Saturated soil
Answer: B
Rationale: Wind can tilt flames into unburned fuel and increase oxygen
supply and heat transfer.
8. A slope generally causes a wildland fire to spread faster uphill
because:
A. Gravity pulls flames downhill
B. Flames and heated gases preheat fuels above the fire
C. Uphill fuels contain no moisture
D. Oxygen disappears downhill
Answer: B
Rationale: Rising heat and flames warm fuels upslope before the fire
reaches them.
9. Which fuel characteristic is most important in determining how
quickly a fuel responds to heating?
A. Color
B. Surface-area-to-volume ratio
C. Mineral content alone
D. Ground elevation alone
Answer: B
Rationale: Fine fuels heat and dry rapidly because they have greater
surface area relative to their volume.
10. Which weather factor most directly affects fire spread direction?
A. Wind
B. Dew point only
, C. Cloud color
D. Barometric instrument size
Answer: A
Rationale: Wind pushes flames, embers, and heated gases and strongly
influences fire direction.
11. Relative humidity is generally:
A. The amount of smoke in the atmosphere
B. A measure of how much moisture the air contains relative to its
capacity
C. The temperature of the soil
D. The speed of wind
Answer: B
Rationale: Relative humidity expresses atmospheric moisture relative to
the amount the air could hold at that temperature.
12. As air temperature rises while moisture remains constant, relative
humidity generally:
A. Increases greatly
B. Decreases
C. Remains exactly constant
D. Becomes zero immediately
Answer: B
Rationale: Warmer air can hold more moisture, so relative humidity
decreases when moisture content remains unchanged.
13. A temperature inversion occurs when:
A. Temperature decreases with height at the normal rate
B. A layer of warmer air exists above cooler air near the surface
C. Wind stops permanently
