S-290 Fire Behavior Final – Questions and Answers, Wildland Fire Behavior & Study Guide

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S-290 FIRE BEHAVIOR FINAL



CONVECTION, WIND, GRAVITY

List three methods of mass transport of firebrands on wildland fires.

A and B

In an unstable atmosphere:

A CONVECTION COLUMN CAN LIFT FIREBRANDS ABOVE THE FIRE, WHERE THE
WIND CAN CARRY IT AHEAD OF THE FIRE

Describe how convection influences transport of firebrands.

Changes in fuel type, wind speed, and steepness of slope.

The primary factors that affect rate of spread are:

A slope reversal with a 6 mph wind blowing at one slope

Which of the following changes would be expected to produce the largest change in
ROS?

Size and shape of fuels, compactness or arrangement of fuels, fuel moisture, and fuel
temperature.

The four fuel factors that affect the ignition of wildland fires are:

FUEL MOISTURE CONTENT IS THE AMOUNT OF WATER IN A FUEL, EXPRESSED
AS A PERCENT OF THE OVEN DRY WEIGHT OF THAT FUEL

Define fuel moisture content.



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The National Weather Service

The Fire Weather Planning Forecasts, Spot Forecasts, Red Flag Warnings, and Smoke
Management Forecasts are products issued by:

Wind driven fires are easier to predict the direction of spread.

Which one or more of the following statements are correct regarding wind driven and
plume dominated fires.

THE STICK METHOD, A CLINOMETER, AND A GPS

List three methods used in the field to determine slope percent.

North

Upslope winds are typically weakest on what aspect?

Passive, active, and independent

The three stages of crown fire development include:

A and B.

Slope affects fuel availability to burn because:

A FUEL MODEL IS A SIMPLIFIED MATHMATICAL REPRESENTATION OF FUELS IN
THE REAL WORLD. A FUEL GROUP IS A GROUPING OF FUEL MODELS THAT
SHARE SIMILAR CHARACTERISTICS

Describe the difference between Fuel Group and Fuel Model.

Time of day, month of year, dry bulb temperature, relative humidity, aspect, percent
slope, shading of surface fuels.

Which of the following topographic variations in wind speed would you expect on a
sunny summer afternoon?



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