CPFM CPFM Fuels Management & Vegetation

Question 1

What is the primary objective of using prescribed fire for fuels management?

Accepted Answer

Reduce hazardous fuel accumulations that could contribute to severe wildfires

Answer

Eliminate all vegetation from an area

Answer

Increase soil erosion to reset the landscape

Answer

Remove wildlife habitat to prevent conflicts

Question 2

Which fuel type has the greatest influence on the rate of spread during a prescribed fire?

Accepted Answer

1-hour fuels (grasses, leaves, pine needles)

Answer

1000-hour fuels (large logs)

Answer

100-hour fuels (large branches)

Answer

10-hour fuels (small branches)

Question 3

What is 'fuel loading' as used in prescribed fire management?

Accepted Answer

The dry weight of combustible organic material per unit area

Answer

The process of adding fuel to an active fire

Answer

The moisture content of fuels before ignition

Answer

The height of standing fuel above the ground

Question 4

What is the 'duff layer' in a forest floor and why is it a concern during prescribed burns?

Accepted Answer

The partially decomposed organic layer between litter and mineral soil that can smolder for days

Answer

The green canopy layer that reflects sunlight

Answer

The layer of mineral soil exposed after burning

Answer

The top layer of fresh leaf litter

Question 5

What does the term 'carry' mean in fire behavior when applied to prescribed fire planning?

Accepted Answer

The ability of fuels to sustain and transmit fire continuously across an area

Answer

Transporting fire equipment to the burn site

Answer

The amount of smoke produced per unit of fuel burned

Answer

Post-fire soil nutrient retention

Question 6

Which surface-area-to-volume ratio characteristic makes grasses ignite and burn faster than large woody debris?

Accepted Answer

Grasses have a higher surface-area-to-volume ratio, allowing rapid moisture loss and heat absorption

Answer

Grasses contain more volatile oils than woody material

Answer

Grasses grow closer to ignition sources

Answer

Grasses have lower ignition temperatures than wood