Torch Operations & Combustibles Flashcards

Which fire extinguisher class is most appropriate for extinguishing a fire in roofing materials ignited by torch operations?

Answer: Class A

Class A extinguishers are designed for ordinary combustibles such as wood, paper, and roofing materials.

What is the primary purpose of a hot work permit for torch operations?

Answer: To authorize hot work and establish safety precautions

A hot work permit formally authorizes the work and establishes required safety measures that must be in place before operations begin.

Torch slag and sparks can travel up to what distance from the point of operation?

Answer: 35 feet

Torch sparks and slag can travel up to 35 feet from the point of operation, requiring a large clear zone.

Before torch operations begin on a roof, a fire guard should verify that:

Answer: All combustible debris has been removed from the work area

Combustible debris such as leaves, scrap wood, and old roofing material must be cleared before torch work begins.

If a fire guard discovers a fire during the 30-minute post-work inspection that cannot be controlled with a portable extinguisher, what is the FIRST action?

Answer: Activate the building fire alarm and call 911

When a fire exceeds the capacity of a portable extinguisher, the fire guard must immediately activate the alarm and call 911.

Which of the following best describes 'kindling temperature' as it applies to torch operations?

Answer: The minimum temperature at which a material will self-sustain combustion

Kindling temperature (ignition temperature) is the minimum temperature at which a material will ignite and sustain burning on its own.

A fire guard notices that torch operations have been conducted next to a foam insulation panel. What is the specific hazard of foam insulation?

Answer: It produces toxic gases when burned and ignites readily

Foam insulation ignites at relatively low temperatures and produces highly toxic gases, creating both a fire and life safety hazard.