If Wet Weight is 600 g and Dry Weight is 480 g, FMC% is what?

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Prepare for the NWCG Introduction to Wildland Fire Behavior Calculations (S-390) with our comprehensive study guide. Study with interactive flashcards and multiple-choice questions designed to enhance your understanding and ensure success on your test.

Multiple Choice

If Wet Weight is 600 g and Dry Weight is 480 g, FMC% is what?

Explanation:
FMC% represents how much moisture is in the fuel relative to its dry weight. It’s calculated by comparing the water mass to the dry mass: FMC% = (Wet − Dry) / Dry × 100. Here, water mass is 600 g − 480 g = 120 g. Then 120 g ÷ 480 g = 0.25, and 0.25 × 100 = 25%. So the FMC% is 25%. This reflects how much moisture content the fuel has, which influences how readily it will ignite and burn.

FMC% represents how much moisture is in the fuel relative to its dry weight. It’s calculated by comparing the water mass to the dry mass: FMC% = (Wet − Dry) / Dry × 100. Here, water mass is 600 g − 480 g = 120 g. Then 120 g ÷ 480 g = 0.25, and 0.25 × 100 = 25%. So the FMC% is 25%. This reflects how much moisture content the fuel has, which influences how readily it will ignite and burn.

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