FREE CPFM Ignition Techniques & Control Questions and Answers

Question 1

Which ignition technique is best for reducing fire intensity in heavy fuel loads?

Accepted Answer

Strip-head firing

Answer

Strip-head firing involves igniting a series of parallel strips into the wind, allowing each strip to burn a short distance before the next is ignited. This technique is effective for reducing fire intensity in heavy fuel loads by creating a wider, less intense fire front, which helps manage heat output and control fire behavior more effectively than a single head fire.

Question 2

What is the primary purpose of a 'backfire'?

Accepted Answer

To create a fuel-free buffer zone

Answer

A backfire is intentionally set to burn against the wind, creating a wide, fuel-free buffer zone that an approaching head fire cannot cross. This technique is critical for establishing secure control lines, particularly in situations where a head fire might otherwise become unmanageable, thereby enhancing safety and containment.

Question 3

When is 'spot ignition' most effective?

Accepted Answer

In areas with patchy fuels or ecological sensitivity

Answer

Spot ignition involves igniting individual points, allowing the fire to spread outward from each spot. This technique is most effective in areas with patchy fuels or ecological sensitivity because it allows for more precise control over fire intensity and spread, minimizing impact on specific areas and achieving desired burn objectives with greater nuance.

Question 4

What safety precaution is critical during aerial ignition?

Accepted Answer

Ensuring ground crew communication and escape routes

Answer

During aerial ignition, maintaining clear communication between the aircraft and ground crews is paramount, along with established escape routes for all personnel. This ensures that ground crews are aware of ignition patterns, can respond to unexpected fire behavior, and have safe egress in case of emergencies, mitigating risks associated with rapid fire spread.

Question 5

Which factor determines the choice between 'head firing' and 'flanking firing'?

Accepted Answer

Wind direction and desired fire spread rate

Answer

The choice between head firing (burning with the wind) and flanking firing (burning perpendicular to the wind) is primarily determined by wind direction and the desired fire spread rate. Head fires spread rapidly and intensely, while flanking fires offer more control and a slower spread, allowing managers to select the technique best suited for specific fuel types and burn objectives.

CPFM - Certified Prescribed Fire Manager Practice Test

CPFM - Certified Prescribed Fire Manager Practice Test

FREE CPFM Ignition Techniques & Control Questions and Answers