DPSST Fire Safety 2

Question 1

What is the minimum safe distance a firefighter should maintain from a propane tank involved in a fire to avoid a BLEVE?

Accepted Answer

300 feet

Answer

A BLEVE (Boiling Liquid Expanding Vapor Explosion) can project tank fragments hundreds of feet, requiring at least 300 feet of clearance.

Question 2

Which class of fire involves energized electrical equipment?

Accepted Answer

Class C

Answer

Class C fires involve energized electrical equipment and require non-conductive extinguishing agents.

Question 3

The fire tetrahedron adds which fourth element to the traditional fire triangle?

Accepted Answer

Chain reaction

Answer

The fire tetrahedron adds the uninhibited chemical chain reaction as the fourth element beyond heat, fuel, and oxygen.

Question 4

During a wildland-urban interface (WUI) fire, which defensible space zone is defined as 0–30 feet from a structure?

Accepted Answer

Zone 1

Answer

Zone 1 (0–30 feet) is the lean, clean, and green zone where vegetation should be highly modified to reduce ignition potential.

Question 5

What does the acronym RECEO-VS stand for in firefighting strategy?

Accepted Answer

Rescue, Exposures, Confinement, Extinguishment, Overhaul, Ventilation, Salvage

Answer

RECEO-VS defines fireground priorities in order: Rescue, Exposures, Confinement, Extinguishment, Overhaul, Ventilation, and Salvage.

(DPSST) Department of Public Safety Standards and Training Certified Practice Test