What is the unit of fireline intensity in metric terms?

Prepare for the NWCG Introduction to Wildland Fire Behavior Calculations (S-390) Test. Study with interactive questions and explanations to ensure you're ready for the challenge.

Multiple Choice

What is the unit of fireline intensity in metric terms?

Explanation:
Fireline intensity measures how much energy is released along the fire edge per second for each meter of that edge. In metric terms, this is expressed as kilowatts per meter (kW/m), which directly combines the power (energy per time) with the length of the fire front. The other units don’t fit this concept: Btu/ft·s is the imperial counterpart, while J/kg is energy per unit mass and Pa is pressure, neither of which describe heat release per unit length over time. So the metric unit for fireline intensity is kW/m.

Fireline intensity measures how much energy is released along the fire edge per second for each meter of that edge. In metric terms, this is expressed as kilowatts per meter (kW/m), which directly combines the power (energy per time) with the length of the fire front. The other units don’t fit this concept: Btu/ft·s is the imperial counterpart, while J/kg is energy per unit mass and Pa is pressure, neither of which describe heat release per unit length over time. So the metric unit for fireline intensity is kW/m.

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