CPFM CPFM Weather & Atmospheric Conditions 2

Question 1

What term describes the depth of the atmospheric layer where vertical mixing occurs, directly affecting smoke dispersal?

Accepted Answer

Mixing height

Answer

Mixing height is the vertical extent of the layer in which atmospheric mixing occurs, determining how high smoke will rise and disperse.

Question 2

Which fire weather forecast product provides site-specific meteorological data tailored to a single burn unit?

Accepted Answer

Spot weather forecast

Answer

A spot weather forecast is issued by the National Weather Service for a specific location, time, and elevation to support a planned prescribed burn operation.

Question 3

What does ERC stand for in fire weather forecasting?

Accepted Answer

Energy Release Component

Answer

Energy Release Component (ERC) is a fire weather index that estimates available energy in the upper fuel layer, reflecting cumulative drying and fire intensity potential.

Question 4

What does a low Ventilation Index indicate for a planned prescribed burn?

Accepted Answer

Poor smoke dispersal conditions

Answer

A low Ventilation Index means limited mixing and wind transport, which can cause smoke to accumulate near the ground and create hazardous air quality.

Question 5

Which wind component most directly determines fire spread direction during a prescribed burn?

Accepted Answer

Surface winds

Answer

Surface winds are in direct contact with surface fuels and flames, making them the primary factor controlling fire spread direction and rate.

CPFM - Certified Prescribed Fire Manager Practice Test

CPFM - Certified Prescribed Fire Manager Practice Test

CPFM CPFM Weather & Atmospheric Conditions 2