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Portable Fire Ext.
Rix's ch. 7 cue cards
| Question | Answer |
|---|---|
| What are fire extinguishers up to 25 kilos described as? | first aid fire fighting appliances |
| How much more efficient is an expert when using a fire extinguisher? | 2.5 times |
| What is the symbol, and color of class A, B, C, D and K | A= triangle, green B= square, red C= circle, blue D= star, yellow K= no symbol, none |
| What type of fires is class K used for? | commercial cooking units involving vegetable or animal oils and fats. |
| What does a 1-A fire put out? | 50 pieces of 5x5x50cm boards |
| What does a 1-B fire put out? | 0.09 sq. m of 6mm deep liquid fuel |
| What is the rule of thumb concerning class B fires? | ten "units" of class "b" extinguishing potential is required per each square meter of appreciable depth of flammable liquid fire |
| What are some class B extinguishing agents? | -dry chemicals -CO2 -Halon -aqueous film forming foams (AFFF) -film forming fluoroproteins (FFFP) |
| What does class C fire extinguishers put out? | any class A or B fires involving active electrical equipment |
| What is the main requirement of the extinguishing agent? | it cannot conduct electricity |
| What are some class C extinguishing agents? | -dry chem -CO2 -Halon -inert gases such as argon |
| What does class D fire extinguishers put out? | metal fires |
| What is the principle extinguishing agent in class D fire extinguishers? | Sodium Chloride (Met-L-X) |
| What type of metal is sodium chloride used on? | magnesium, potassium, sodium, titanium and NaK alloys |
| What happens when sodium chloride is used on a fire? | The salt acts like a heat sink, dissipating heat from the fire, and also forms an oxygen-excluding crust to smother the fire |
| How does Class K fire extinguishers work? | bonds with the oils through saponification |
| What is saponification? | it is a reaction that emulsifies the oil to form a type of soap that floats on the surface of the oil and prevents re-ignition of the oil vapors |
| What three criteria must class K fire extinguishers meet? | -Completely extinguish the fire in the deep fryer -Prevent re-ignition of the oil for 20min -Cause no splashing of flaming oil outside of the fryer |
| What is considered light hazard occupancies? | schools, office buildings, churches and other similar places |
| What is the fire extinguisher requirements for light hazard occupancies? | Class A = 2 units within 23m Class B = 5 units within 9m |
| What is considered ordinary hazard occupancies? | department stores, warehouses, and manufacturing buildings of average hazard |
| What is the fire extinguisher requirements for ordinary hazard occupancies? | Class A = 2 units within 23m Class B = 10 units within 9m |
| What is considered extra hazard occupancies? | Woodworking, spray painting, furniture factories |
| What is the fire extinguisher requirements for extra hazard occupancies? | Class A = 4 units within 23m Class B = 40units within 9m |
| How do class C, D and K fire extinguishers fit into the occupancy hazard classifications? | Class C = same as class A or B Class D = no more than 23m away Class K = 40B minimum within 9m |
| What fire extinguishers does a pump, tanker and ATP have? | Back-pack pump (4A, 60-180 sec, 3-9m) Dry Chemical (20A60BC, 10-25sec, 2-4.5m) CO2 (10BC, 10-30sec, 1-2.5m) |
| What fire extinguishers does a rescue have? | Dry Chemical (20A60BC, 10-25sec, 2-4.5m) CO2 (10BC, 10-30sec, 1-2.5m) Metal X (D, 10-25sec, 2-4.5m) |
| What fire extinguishers does a ladder have? | Dry Chemical (20A60BC, 10-25sec, 2-4.5m) CO2 (10BC, 10-30sec, 1-2.5m) Metal X (D, 10-25sec, 2-4.5m) |
| What fire extinguishers does a Aerial have? | Dry Chemical (20A60BC, 10-25sec, 2-4.5m) CO2 (10BC, 10-30sec, 1-2.5m) |
| What does the mnemonic REACT stand for? | -Rescue -Activate alarm -Call 911 -Try to extinguish |
| What does the mnemonic PASS stand for? | -Pull pin -Aim -Squeeze -Sweep |
| How much water does a backpack water extinguisher hold? | 20L |
| How much foam is added to a backpack water extinguisher? | 4 oz. |
| How do CO2 fire extinguishers work? | They work by displacing available oxygen and thus smothering the fire |
| What is the danger when using a CO2 fire extinguisher? | re-ignition |
| What are the 4 parts of a dry chemical extinguisher? | -a pressure vessel -a valve -a pressurizing gas -an extinguishing agent |
| What are the most common dry chemical extinguishing agents? | -multipurpose triplex chemical monoammonium phosphate -sodium bicarbonate -potassium bicarbonate -potassium chloride |
| How do dry chemicals extinguish the fire? | accomplished through oxygen exclusion (smothering) and the interruption of the chemical chain reaction |
| Is potassium bicarbonate or sodium bicarbonate more effective? | Potassium bicarbonate is 1 and 1/2 times more effective but also more expensive |
| What is the dry chemical agent MONNEX? | carbonic powder base dry chemical agent |
| Hand portable extinguisher units vary in size from ___ to ____ but will not exceed ____ of dry chemical. | 0.5kg, 14kg, 25kg |
| What is the size of wheeled extinguishing units? | 34kg to 160kg |
| How far ahead of the leading edge of the flame should you direct a dry chemical fire extinguisher? | 15cm |
| What are dry powder extinguishers used for? | class D fires only |
| What is the dry powder extinguisher that the EFD uses? | Metal X |
| What metals does Metal X extinguisher put out? | sodium, potassium, sodium/potassium alloys, or magnesium |
| Where are halon extinguishers used? | Aircrafts, military use, and in the Channel Tunnel. Can also be found in: -Flammable liquid storage tanks -Electronic and electrical cabinets -Computer rooms -Paint booths |
| How often must fire extinguishers be serviced? | Annually |
Created by:
EFD 133