F60 Fire Extinguisher & Emergency Response 3 — Questions and Answers
Question 1: A CO2 extinguisher is least effective outdoors because:
- CO2 reacts with oxygen in sunlight
- Wind disperses the CO2 gas before it can smother the fire (Correct answer)
- CO2 is flammable in open air
- CO2 only works on Class A fires
Correct answer: Wind disperses the CO2 gas before it can smother the fire
CO2 is a gaseous agent that wind can rapidly disperse, significantly reducing its fire-suppression effectiveness in outdoor or windy environments.
Question 2: Which extinguisher class rating covers fires in energized electrical equipment?
- Class A
- Class B
- Class C (Correct answer)
- Class D
Correct answer: Class C
Class C ratings indicate the extinguishing agent is non-conductive and safe for use on fires involving live electrical equipment.
Question 3: When the fire guard calls 911 during a torch operation fire, which information should be given FIRST?
- The name of the torch operator
- The exact location and address of the fire (Correct answer)
- The permit number for torch operations
- The type of material on fire
Correct answer: The exact location and address of the fire
Dispatchers need the exact location first so they can begin routing units while gathering additional details.
Question 4: If a fire spreads beyond what a portable extinguisher can control, the fire guard must:
- Request a second extinguisher and continue fighting
- Immediately evacuate and ensure others leave the area (Correct answer)
- Close all windows to starve the fire of oxygen
- Wait outside the room and monitor the fire's progress
Correct answer: Immediately evacuate and ensure others leave the area
Once a fire is beyond the capacity of a portable extinguisher, evacuation of all personnel is mandatory and no further extinguishment attempts should be made.
Question 5: For torch operations on a roof, how long must the fire guard maintain watch after work is completed?
- 15 minutes
- 30 minutes
- 60 minutes (Correct answer)
- Until the contractor leaves the site
Correct answer: 60 minutes
FDNY requires a fire guard to maintain a watch for at least 60 minutes after torch operations on a roof have ceased.
Question 6: Which type of fire extinguisher should NEVER be used on a magnesium or titanium fire?
- CO2 extinguisher
- Water extinguisher (Correct answer)
- Dry chemical extinguisher
- Class D extinguisher
Correct answer: Water extinguisher
Water reacts violently with burning metals such as magnesium, potentially causing explosive spattering and spreading the fire.
Question 7: The primary role of the fire guard during torch operations is to:
- Operate the torch when the licensed operator is on break
- Monitor the work area continuously and respond to fire emergencies (Correct answer)
- Sign off on the hot work permit before operations begin
- Provide first aid to injured workers
Correct answer: Monitor the work area continuously and respond to fire emergencies
The fire guard's primary duty is continuous monitoring of the work area for fire hazards and responding immediately to any fire that starts.
F60 Fire Extinguisher & Emergency Response 3
A CO2 extinguisher is least effective outdoors because: