CPFM CPFM Weather & Atmospheric Conditions

Question 1

What wind speed range is generally considered acceptable for conducting prescribed burns?

Accepted Answer

5–15 mph

Answer

0–2 mph

Answer

20–25 mph

Answer

30+ mph

Question 2

What atmospheric condition traps smoke near the ground by placing warm air above cooler air?

Accepted Answer

Temperature inversion

Answer

Convective column

Answer

Adiabatic lapse rate

Answer

Thermal updraft

Question 3

What relative humidity level is typically considered the minimum threshold for safe prescribed burning?

Accepted Answer

25–30%

Answer

10%

Answer

15%

Answer

50%

Question 4

What does the Haines Index measure in relation to prescribed fire?

Accepted Answer

Potential for large fire growth

Answer

Fuel moisture content

Answer

Wind direction variability

Answer

Smoke dispersal capacity

Question 5

Which weather phenomenon poses the greatest risk of causing spotting (fires starting outside the burn unit) during a prescribed burn?

Accepted Answer

Gusty, erratic winds

Answer

Fog

Answer

Stable air mass

Answer

High relative humidity

Question 6

During clear, sunny conditions, at what time of day is atmospheric instability typically greatest?

Accepted Answer

Early afternoon (1–3 PM)

Answer

Early morning (6–8 AM)

Answer

Late morning (9–11 AM)

Answer

Evening (6–8 PM)