Fire Suppression and Emergency Response
Core Concepts
Candidates must command the fire behavior triangle (fuel, oxygen, heat, and the chemical chain reaction that makes it a tetrahedron), the stages of fire development (incipient, growth, fully developed, decay), and the suppression methods that map to each: cooling, smothering, starving, and chemical interruption. Know the difference between direct, indirect, and combination attack, and when each is appropriate. Understand ventilation as a coordinated tactic-vertical and horizontal-and why uncoordinated ventilation can drive fire growth. Master the tactical priorities: rescue, exposure protection, confinement, extinguishment, overhaul, and salvage, and the difference between strategy (offensive/defensive) and tactics.
Traps to Watch
Questions often swap strategy and tactics, or present a scenario where a defensive attack is chosen while savable occupants remain-rescue always outranks property. Watch for transition attacks described as "going defensive," and for overhaul questions where the answer ignores smoldering voids or rekindle potential. Stream selection traps: solid stream for reach and penetration, fog for protection and hydraulic ventilation, but fog in a hot interior can steam-burn occupants and push fire.
Worked Example
A two-story dwelling shows heavy fire from the second floor, all occupants accounted for, and the first floor is tenable. Rule of thumb: if no life hazard remains and the fire is beyond the reach of a handline from a protected position, go defensive and protect exposures. Here, a defensive exterior attack with exposure lines is correct-do not commit crews interior to a floor already lost.
Rule of Thumb
RECEO-VS (Rescue, Exposures, Confinement, Extinguishment, Overhaul, Ventilation, Salvage) is the order of consideration, not a rigid script-rescue can override everything.