F60 Torch Operations & Combustibles 3 — Questions and Answers
Question 1: Which fire extinguisher class is most appropriate for extinguishing a fire in roofing materials ignited by torch operations?
- Class A (Correct answer)
- Class B
- Class C
- Class D
Correct answer: Class A
Class A extinguishers are designed for ordinary combustibles such as wood, paper, and roofing materials.
Question 2: What is the primary purpose of a hot work permit for torch operations?
- To document the torch operator's qualifications
- To authorize hot work and establish safety precautions (Correct answer)
- To notify building tenants of scheduled noise
- To record the equipment serial numbers used
Correct 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.
Question 3: Torch slag and sparks can travel up to what distance from the point of operation?
- 5 feet
- 15 feet
- 35 feet (Correct answer)
- 50 feet
Correct answer: 35 feet
Torch sparks and slag can travel up to 35 feet from the point of operation, requiring a large clear zone.
Question 4: Before torch operations begin on a roof, a fire guard should verify that:
- The weather forecast shows no rain
- All combustible debris has been removed from the work area (Correct answer)
- The torch fuel cylinders are full
- The building owner is present on site
Correct 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.
Question 5: 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?
- Attempt to control the fire with a garden hose
- Activate the building fire alarm and call 911 (Correct answer)
- Find the torch operator to assist
- Evacuate only the immediate floor
Correct 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.
Question 6: Which of the following best describes 'kindling temperature' as it applies to torch operations?
- The temperature at which a torch flame ignites
- The minimum temperature at which a material will self-sustain combustion (Correct answer)
- The temperature of the torch nozzle during operation
- The ambient temperature required to use a torch safely
Correct 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.
Question 7: A fire guard notices that torch operations have been conducted next to a foam insulation panel. What is the specific hazard of foam insulation?
- It reflects heat back onto the torch operator
- It produces toxic gases when burned and ignites readily (Correct answer)
- It is too thick to allow heat penetration
- It can cause equipment malfunction
Correct 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.
F60 Torch Operations & Combustibles 3
Which fire extinguisher class is most appropriate for extinguishing a fire in roofing materials ignited by torch operations?