Appendix F Pre-Work

Define and apply the concept of ratios and percentages. A . ratio is a proportional relationship of one value to another such as the ratio of gas to oil in a chain saw fuel mix. Ratios can be written as a fraction (½) or in ratio notation (1:2). The value of a ratio is the division of the first number by the second number.

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Module 1: Basic Concepts of Wildland Fire Topic 1: Course ...

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wildland fire fighting duties—safely perform fire suppression and management duties in a wildland environment and obtain their Firefighter Type 2 certification. If you’re under the impression that fire fighting is a literal “walk in the park” or a nice job to

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NIMS Core Curriculum (Courses relevant to NWCG)

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Page 6 A chute is a steep V-shaped drainage, and a saddle is a common name for the depression between two adjacent hilltops. Chutes and saddles can: • Drastically accelerate fires • Alter the flow of winds causing erratic fire behavior • Change the rate and direction of spread by acting as chimneys Warning Even seemingly insignificant chutes and saddles, and those concealed by vegetation ...

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Fire behavior Module introduction - NWCG

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When tree tops are less than 20 ft. (7 m) from other tree tops, and bush tops are less than 20 ft. (7 m) from other bush tops, a fire can move more quickly and easily from tree to tree or bush to bush. Narration Script: Let’s investigate the fuel side …

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Fire transportation safety isn’t difficult or technical. It starts with using a little common sense. Like so many other aspects of fire fighting, traveling to and from the fireline requires you to observe proper ... spotter or scout to walk ahead of the vehicle or behind the vehicle when backing up.

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These three ingredients are the base for what firefighters call the fire triangle. Read the following to review your knowledge of the fire triangle. Oxygen Sources Wildland fuels have an abundant supply of oxygen available in the air. A concentration of approximately 16 percent oxygen is required for combustion, but normal air contains 21

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lapse rate less than the dryadiabatic rate of 5.5°F. per 1,000 feet for an unsaturated parcel is considered stable, because vertical motion is damped. A lapse rate greater than dry-adiabatic favors vertical motion and isunstable. In the absence of saturation, an atmospheric layer is neutrally stable if its lapse rate is the same as the

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