CBM Smoke Management & Post-Burn Evaluation 3

Question 1

Under 40 CFR Part 51 Regional Haze Rule, prescribed fire managers must consider impacts to:

Accepted Answer

Mandatory Class I Federal Areas such as national parks and wilderness areas

Answer

The Regional Haze Rule specifically protects visibility in mandatory Class I Federal Areas, requiring coordination when prescribed fires may impact those airsheds.

Question 2

Which condition is most likely to cause a prescribed fire smoke plume to 'fumigation,' meaning smoke is mixed downward to ground level at a receptor site?

Accepted Answer

An elevated stable plume intercepted by a growing mixing layer the following morning

Answer

Morning heating erodes the inversion, and the rising mixing layer reaches an elevated stable plume, flushing it downward to the surface—this is fumigation.

Question 3

In a post-burn evaluation, a burn manager finds that soil in portions of the unit appears ash-white and friable several inches deep. This finding most likely indicates:

Accepted Answer

High severity fire that may have damaged soil structure and biological communities

Answer

White ash several inches into the soil profile indicates high temperatures that can damage soil aggregates, mycorrhizal networks, and organic matter.

Question 4

The Haines Index (LI) specifically addresses which atmospheric smoke management concern?

Accepted Answer

Potential for large or erratic fire behavior due to dry, unstable lower atmosphere

Answer

The Haines Index measures atmospheric stability and moisture in the lower troposphere to indicate potential for erratic plume behavior and large fire development.

Question 5

When a smoke management plan requires a minimum transport wind speed of 8 mph, the primary reason is to:

Accepted Answer

Ensure adequate horizontal movement of smoke away from receptors

Answer

A minimum transport wind speed ensures smoke is physically moved away from sensitive receptor areas rather than stagnating.

(CBM) Certified Burn Manager Practice Test

(CBM) Certified Burn Manager Practice Test

CBM Smoke Management & Post-Burn Evaluation 3