Chapter 7 Flashcards
List the symbol, colour and materials for a class D extinguisher
- Star
- Yellow
- Combustible Metals (Magnesium, Sodium, Lithium, Potassium, Titanium, Zirconium)
List the symbol, colour and materials for Class B extinguishers
- Red
- Square
- Greases, Oils, Solvents, Flammable and Combustible liquids
List the symbol, colour, and materials for a Class A extinguisher
- Triangle
- Green
- Wood, Cloth, Paper, Rubber, Plastics
List the symbo, colour, and materials for a class C extinguisher
- Circle
- Blue
- Fires involving energized electrical equipment
List the symbol, colour, and materials for a class K extinguisher
- No symbol
- No colour
- Commercial cooking units involving vegetable or animal oils and fats
Define Saponofication
A reaction that emulsifies the oil to form a type of soap that floats on teh surface of the oil & prevents re-ignition of the oil vapors
What colour and symbol correlate to a class K extinguisher
No colour
No symbol
An expert can extinguish how many times more than a fire extinguisher’s rating?
2.5x
How much fuel with a B-1 extinguisher?
10-B?
- 1-B
- 0.09sqm (1sqft)
- 10-B
- 0.9sqm (10sqft)
What is the PASS for fire extinguishers?
P- Pull
A- Aim
S- Squeeze
S- Sweep
What fuels compose a Class B fire?
Greases, Oils, Solvents, Flammable and Combustible liquids
What materials compose a Class A fire
Wood, Cloth, Paper, Plasitcs, Rubber
What classifies a Class C fire?
Fires involving energized electrical equipment
What fuels burn in Class D fires?
Flammable and combustible metals
How many and what size of wood cribbing is used to test Class 1- A fires?
50 pieces of 50 cm x 5 cm x 5 cm
What hazard is present when using a CO2 fire extinguisher
Re- Ignition
What are the CO2 fire extinguishers located.
Pump
Rescue
Ladder
Tankers
How much extinguishing agent can a pump/ tank backpack water extinguisher carry?
~20l
Can add foam to mixture 0.5-0.6% foam
How much does Metal X extinguishesr weigh?
14 kg
What is the discharge time and distance of
Metal X extinguishers
- 10-25 Sec
- 2 - 4.5m
What are the extinguishers found on EFRS Ladders
- ABC
- 20A-60BC
- Dry Chemical
- BC
- 10BC
- CO2
- D
- Metal X (quints)
What is the discharge Time and Distance of CO2 10BC extinguishers
- 10-30Sec
- 1-2.5m
What exinguishers are carried on EFRS Rescues
- ABC
- 20A60BC
- Dry chemical
- BC
- 10BC
- CO2
- D
- Metal X
What is the Discharge Time and Distance of Dry Chamical extinguishers (20A60BC)
- 10-25Sec
- 2-4.5m
What is the Discharge time and Distance of Backpack Pump 4A
- 60-180s
- 3-9m
Which extinguishers are carried on EFRS Pump/Tanker/ATP?
- ABC
- 20A60BC
- Dry Chemical
- BC
- 10BC
- CO2
- A
- 4A
- Backpack Pump- Water
What criteria must class K extinguishrers meet?
- Completely extinguish the fire in the deep fryer
- Prevent re-ignition of the vegetable oil for 20 min or reduce the oil temperature at least 15.6 deg C below auto-ignition temperature
- Cause no splashing of flaming oil outside the fryer
What depth is “appreciable”
>/= 6mm
Class B fire extinguishers typical Size range?
1B- 160B
What types of extinguishing agents are used for Class A fires
- Water
- Foam concentrate mix
- Dry chemical
- Halon
Most Class A pertable fire extinguishers are rated
1A- 40A
What is the fire extinguisher distribution for an:
Extra Hazard Occupancy
4 units every 23m
What is the fire extinguisher distribution for an ordinary Hazard occupancy
2 units every 23m
What ratings are given to Class K fire extinguishers
None given
What action does the Sodium Chloride provide as an extinguishing agent?
Heat Sink
Forms oxygen- excluding crust
What other components make up a Class D extinguishing agent (Sodium cloride Primary agent)
- Thermoplastic powder
- Waterproofing (metal stearates)
- Anti- caking materials (tricalcium phosphate)
Which combustible metals use Sodium Chloride as an extinguishing agent?
- Magnesium
- Potassium
- Sodium
- Titanium
- Sodium Potassium alloys
Met L-X, Super D extinguishing agents
Why must the Class D extinguisher agents be compatible with the metal burning?
Not all extinguishing agents are compatable with all combustible metals
What ratings are given to Class C fire extinguishers
No testing or numerical rating
What ratings are given to Class D fire extinguishers
No numerical ratings
What extinguishing agents are used in Class C extinguishers
- Dry chemical
- CO2
- Halon
- Inert Gases (ie: argon)
What extinguishing agents are used in Class B extinguishers
- Dry chemicals
- CO2
- Halon
- Aqueous FIlm Forming Foams (AFFF)
- Film Forming Flouroproteins (FFFP)
How often must portable fire extinguishers found in apartments. hi-rises, commercial, and retail outlets (etc) be inspected, servicesd and certified?
annually
How often must food service industry range extinguisher units be inspected, serviced, and certified
6 months
What safety factors must be met when using a dry powder Fire extinguisher
- REACT
- Ensure a safe approach and safe egress
- Ensure the power source energizing the fire is disconnected
- Ensure the dry powder is compatible with the burning metal
- PASS to apply the dry powder onto the burning material
- Dry powder can be scooped or shovelled onto the fire
- Watch for burn through of the dry powder
- Range is limited ~2m -4.5m
- Discharge time 10-25s
- Avoid inhaling the dry chemical dust
- Back away from the fire
What components make up an assessment of the situation, prior to using a portable fire extinguisher
- Size up teh Class & Volume of burning material
- Select a portable fire extinguisher of the correct class and rating to meet the demands of the fire
- Evaluate the wind or internal environment to maintain a safe access route to the fire
- Maintain a route for safe egress from the fire room
- Use the PASS system for operating the extinguisher
What operational and safety factors must be used with CO2 fire extinguishers
- REACT
- Ensure a safe approach and egress
- Ensure the power source energizing the fire is disconnected
- PASS to apply the CO2 onto the burning material
- Effectiveness is limited in windy conditions
- Effective when used in confined spaces
- Range is limited ~1-2.5m
- Discharge time 10-30s
- CO2 gas temperature can reach -100deg C
- Static electricity will build up in the horn during discharge- ensure you hold the grounded hose when operating
- Ensure exposed flesh is not in contact with the discharge horn
- Back away from the fire
What safety and operational factors must be used when operating a Dry Chemical fire extinguisher
- REACT
- Ensure a safe approach and egress
- Ensure the power source energizing the fire is disconnected
- PASS to apply the dry chemical onto the burning material
- Effectiveness is limited in windy conditions
- Range is limited 2-4.5m Discharge ~10-25s
- Avoid inhaling dry chemical dust
- Back away from fire
Backpack pump-tank water extinguisher checks include:
- The appropriate extinguisher in its designated location
- Signs of physical damage to the pack straps or tank bladder
- Signs of cracking on the fill cap rubber seal
- Signs of cracking on hoses or obstructions to nozzles
- Effectiveness of hand pump
What should Fire extinguishers be checked for
- Proper extinguisher in designated location
- Extinguisher is fully charged
- Examine for broken witness wire or other signs of previous use
- Signs of tank corrosion or other physical damage
- Signs of cracking on hoses, or obstructions to nozzles
- Date of last hydrostatic test of extinguisher shell
- Date of last inspection
When should apparatus extinguishers be inspected
During regular vehicle inventory checks
What class ratings to Halon fire extinguishers carry
Class A-B-C
*Most useful for class C
Which extinguishing agent is used by EFRD for Class D fires
Metal-X
Where are Dry chemical extinguishers located (which apparatus)
Pumps
Tankesr
Ladders
Rescue
ATP
What size ranges do portable Dry Chemical extinguishers come in?
0.5-14kg
*will not exceed 25kg for portable
Where are Dry Powder extinguishers located in EFRS (which apparatus)
Rescue
Quints
List the common dry chemical extinguishing agents
- Multi purpose triplex chemical mono-ammonium phosphate (ABC)
- Sodium bicarbonate
- Potassium bicarbonate
- Potassium Chloride
What two classes are Dry Chemical rated for?
- Ordinary
- Class B & C
- Multipurpose
- Class A- B- C
Explain the basic fire extinguisher assessment of a situation
- Size up the calss and volume of material burning
- Select a portable fire extinguisher of the proper class and rating
- Evaluate the wind or internal environment
- Maintain a safe access route
- Maintain a safe egress route
- Use the PASS system for fire extinguisher effectively
Explain the REACT mnemonic
- Rescue
- Initial evacuation of the people in the room containing the fire
- Ensure Door is closed
- after evac. close the doors to reduce the risk for fire spread and to extend tenable atmosphere in other rooms
- Activate Alarm
- activate the building alarm, or send some one to notify others inside
- Call 911
- activate other emergency resources in the event the fire extinguisher cannot contain the fire
- Try to extinguish
- Return to fire room and attempt to use the apporopriate extinguisher to control the fire
What four components make up a Dry chemical fire extinguisher
- Pressure vessel
- Valve
- Pressurizing gas
- Extinguishing agent
