Fire Behavior and Suppression Flashcards
7 cards from real Firefighter practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Fire Behavior and Suppression flashcards as text
What is the flash point of a liquid fuel?
Answer: Lowest temperature it gives off enough vapor to ignite momentarily
Flash point is the lowest temperature at which a liquid gives off enough vapor to form an ignitable mixture near its surface.
Which agent extinguishes fire mainly by displacing oxygen and is electrically non-conductive?
Answer: Carbon dioxide (CO2)
CO2 extinguishes by displacing oxygen and leaves no residue, making it suitable for electrical fires.
The condition where superheated fuel-rich smoke ignites suddenly when oxygen is reintroduced is:
Answer: Backdraft
Backdraft occurs when oxygen suddenly reaches a ventilation-limited, fuel-rich compartment, causing explosive ignition.
Smoke is dangerous primarily because it contains:
Answer: Toxic gases, unburned fuel, and particulates
Smoke is a mix of toxic gases, unburned fuel particles, and heat that is both flammable and lethal.
Which fire stage is characterized by a decreasing temperature as fuel is consumed?
Answer: Decay stage
The decay stage occurs when available fuel or oxygen is consumed and temperatures decline.
Class K fires involve which specific fuel?
Answer: Cooking oils and fats
Class K fires involve cooking oils and fats, common in commercial kitchens, requiring wet chemical agents.
Saponification is the extinguishing process used by which agent on cooking oil fires?
Answer: Wet chemical agent
Wet chemical agents react with hot cooking oils to form a soapy foam blanket that smothers the fire.