1. An Introduction to “Fire Extinguishers”
Crusoe 7-10 Secondary College
Science
Senior Green Team

2. OBJECTIVES: After this training you should be able to:
IDENTIFY 3 common classes of fires
SELECT the proper type of extinguisher
EVALUATE when it is safe to
fight an “early-stage” fire, and;
APPLY the “P.A.S.S. method to
operate a portable extinguisher.

3. UNABLE to evaluate a fire UNAWARE of DANGER due to...
UNTRAINED PEOPLE Cannot use a fire extinguisher safely because they are:
UNABLE to evaluate a fire
UNAWARE of DANGER due to...
LACKING JUDGEMENT regarding:
Safe and correct use of, and
Limitations of portable extinguishers

4. WHY UNTRAINED PEOPLE Can’t use a fire extinguisher safely (continued):
INEXPERIENCED
Don’t know about the proper type of extinguisher
Don’t know how to make a “Fight or Flight” analysis
Unfamiliar with the “P.A.S.S. method”

5. COMMON FIRE CLASSIFICATIONS
“Ordinary” combustibles
Paper, wood, rubber, plastics and textiles.
“Flammable liquids”
Oil, gasoline, solvents
“Energized circuits”
Electrical equipment
and computers E

6. HOW THEY WORK: Works by cooling.
Numerical rating indicates amount of agent, duration, and range of discharge on test fires.
Area of Class A fire which a “non-expert” can extinguish, with proper training
1-A is equivalent on Class-A fire to five liters of water.
2-A contains has twice as much extinguishing agent.

7. HOW THEY WORK: Works by blanketing the fuel.
Interrupts chemical reaction at fuel surface.

8. E HOW THEY WORK: Class “E” units have no numerical rating.
A Class “E” rating doesn’t imply any capacity.
Only indicates that the extinguishing agent is non-conductive, safe on energized equipment.
Works by displacing oxygen, smothering fire.

9. Portable Fire Extinguishers
Can be CARRIED to a fire
Weigh from 1.5 to 20 kg

10. Portable Fire Extinguishers
LIMITED IN:
Capacity to 9 kg. of extinguishing agent
Range - Typically 1 to 3 m
Duration - Discharge their contents in only 5 to 30 seconds!

11. Extinguisher Common features
Locking pin
Carrying handle / operating lever
Pressure gauge
Label :
Type (Water, C02, Dry Chemical)
Classification (A, B, C)
Instructions
Discharge nozzle or horn

12. COMMON TYPES OF FIRE EXTINGUISHERS:
WATER
DRY CHEMICAL
CO2

13. WATER Water + CO2 propellant ONLY for Class fires wood / paper, etc.
Spreads burning liquids!
DANGER of electric shock if used on on live circuits!

14. DRY CHEMICAL MULTI-PURPOSE RATED
Either Or
Best for general use:
Reduced risk of re-ignition
A 3.5kg. unit empties in 8-10 secs.
Effective range of 2 ft. to 5 m.

15. C02 - Rated DISPERSES QUICKLY! Best on burning liquids / electrical
SHORT range - 1 to 3 m.
6- kg unit empties in 5 to 10 seconds!
Use short spurts!
DISPERSES QUICKLY!
Continue applying after the fire is out!
Unit gets VERY cold - hold properly

16. In case of burning odor or smoke:
Call 911 First!
Notify Security - X 43434
Disconnect Equipment
Remove combustibles, if you can do so without danger to yourself
Notify Floor Monitors
and Emergency Safety Coordinator

17. REACT upon discovery of fire or smoke
Remove persons in immediate danger!
Ensure doors are closed! (confine fire/smoke)
Activate the building alarm !
Call the Fire Department !
Treat ALL fires as DANGEROUS!
Continue a complete building evacuation
Do not attempt to fight a fire UNLESS you are OSHA certified in use of a fire extinguisher !

18. Use a portable extinguisher ONLY if the:
Building is being evacuated (Fire alarm has been pulled)
Fire Department has been called (Dial 911!)
Fire is NOT spreading (small and contained)
EXIT IS CLEAR (fight fire with your back to an exit )
Proper extinguisher is at hand, and...
You have been trained and know how to use it!
You use “Buddy System” - have someone back you up!
Get assistance BEFORE trying to fight a fire!

19. PULL AIM SQUEEZE SWEEP P.A.S.S.
Remember the PASS word: 1) Keep your back to a clear escape route, 2) Stand back 2 to 3 feet from the fire, 3) Then >>:

20. PULL the pin

21. LOW at the base of the fire
AIM
LOW at the base of the fire

22. SQUEEZE
the lever

23. SWEEP
from side to side

24. OK, It’s out… Now What? WATCH the fire area
If the fire flares up again repeat!
If you can’t control the fire, LEAVE immediately!
Call the fire department to inspect the scene!
Recharge or replace any used fire extinguisher!