CBM Fire Behavior & Ecology 2

Question 1

Which component of the fire environment triangle describes dead and live plant material available as fuel?

Accepted Answer

Fuels

Answer

Fuels are the combustible organic material (dead and live vegetation) that provide the energy source for fire.

Question 2

The concept of 'fine fuel moisture content' is critical because fine fuels ignite most readily when their moisture content falls below approximately:

Accepted Answer

12%

Answer

Fine fuels with moisture content below about 12% are highly susceptible to ignition and rapid fire spread.

Question 3

What ecological term describes the increase in plant species diversity that often occurs in the first few years following a prescribed burn?

Accepted Answer

Post-fire pulse

Answer

A post-fire pulse refers to the temporary spike in plant diversity and productivity as dormant seeds germinate and suppressed species rebound after fire removes competition.

Question 4

In fire behavior, 'spotting' refers to which phenomenon?

Accepted Answer

Embers carried ahead of the fire front to start new ignitions

Answer

Spotting occurs when firebrands (burning embers) are lofted by convection or wind and land beyond the fire perimeter, starting new fires.

Question 5

The 'critical fire weather' condition known as the Haines Index primarily measures:

Accepted Answer

Lower atmosphere stability and dryness contributing to erratic fire behavior

Answer

The Haines Index combines atmospheric stability and moisture deficit in the lower atmosphere to indicate potential for large or erratic fire behavior.

(CBM) Certified Burn Manager Practice Test

(CBM) Certified Burn Manager Practice Test

CBM Fire Behavior & Ecology 2