Fire Safety Flashcards
7 cards from real DPSST 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 Safety flashcards as text
What is the minimum safe distance a firefighter should maintain from a propane tank involved in a fire to avoid a BLEVE?
Answer: 300 feet
A BLEVE (Boiling Liquid Expanding Vapor Explosion) can project tank fragments hundreds of feet, requiring at least 300 feet of clearance.
Which class of fire involves energized electrical equipment?
Answer: Class C
Class C fires involve energized electrical equipment and require non-conductive extinguishing agents.
The fire tetrahedron adds which fourth element to the traditional fire triangle?
Answer: Chain reaction
The fire tetrahedron adds the uninhibited chemical chain reaction as the fourth element beyond heat, fuel, and oxygen.
During a wildland-urban interface (WUI) fire, which defensible space zone is defined as 0–30 feet from a structure?
Answer: Zone 1
Zone 1 (0–30 feet) is the lean, clean, and green zone where vegetation should be highly modified to reduce ignition potential.
What does the acronym RECEO-VS stand for in firefighting strategy?
Answer: Rescue, Exposures, Confinement, Extinguishment, Overhaul, Ventilation, Salvage
RECEO-VS defines fireground priorities in order: Rescue, Exposures, Confinement, Extinguishment, Overhaul, Ventilation, and Salvage.
A firefighter notices the smoke at a structure fire has changed from light gray to dark black and turbulent. This MOST likely indicates:
Answer: A flashover or rapid fire growth is imminent
Dark, turbulent, thick smoke indicates incomplete combustion and high heat buildup, which are warning signs of impending flashover.
Which nozzle pattern provides the best protection for a firefighter advancing into a burning structure?
Answer: Wide-angle fog (60–90°)
A wide-angle fog pattern creates a water shield that absorbs radiant heat and provides protection while advancing.