Flashcards in Fire Extinguishers Deck (77):
Portable fire extinguishers are the most common...
Fire protection appliances
What stage/s are fire extinguishers intended to be used on?
Incipient or early growth stage
How many classes of fire extinguishers are there?
Before selecting the appropriate extinguisher you must...
Determine what is burning
Name the 5 classes of fires
Class A- Ordinary combustibles
Class B- Flammable liquids
Class C- Energized electrical
Class D- Combustible metals
Class K- Grease fires (Power point says "Grease laden equipment)
Know examples of Class A fires...
Class A fires can be easily extinguished with ____ based agents
Know examples of Class B fires...
Agents used to extinguish Class B fires...
Class B Foam
Class C extinguishers have a special property that allows them to be effective on electrical fires...
They will not conduct electricity
Once power is turned off on a Class C fire, it becomes...
Class A or B fire
Be able to list some combustible metals...
What are 2 common uses of magnesium?
Wheels and transmissions
Some metal box springs
What is an indication of a magnesium fire?
Bright white light emitting during the combustion process
Name some things that fall under a class K fire...
2 types of Class K extinguishment are...
Wet chemical systems
Portable fire extinguishers
What are the 4 methods that fire extinguishers use to put out a fire?
What are the 7 types of fire extinguishers listed in the power point?
What are the 3 types of expelling methods for fire extinguishers?
Pump type H2O extinguishers are commonly used in...
What is "PW" when referring to fire extinguishers?
What are stored pressure H2O extinguishers useful for?
All types of small class A fires
With a stored pressure H2O extinguisher, the 2 gases that supply pressure are ___ or ____
Air or nitrogen
You can add a class A foam to a PW can to reduce ___ ___
The straight stream on a PW can have a range of __ to __ feet.
What is the difference between water mist stored pressure and regular stored pressure?
What other class of fire can it be used on?
Water mist stored pressure use deionized water as agent
Safe on Class C fires
Wet chemical extinguishers are designed for what class of fires?
Wet chemical extinguishers are _____ based with a low __
Wet chemical extinguishers combine with oils to make a soapy surface which is known as...
What does AFFF stand for?
Aqueous film forming foam
AFFF extinguishes flames with what method?
The stored pressure on AFFF cans comes form ___ or ____
Air or nitrogen
How should you apply AFFF to a fire?
Don't spray directly on spill, rain the agent down or deflect from a nearby object
Clean agent extinguishers are designed to replace...
Halogenated extinguishing agents
Clean agent extinguishers rapidly evaporate and leave no ____
Clean agent extinguishers can be used on what class fire/s?
Class A, B, C
What are the 2 ways that CO2 extinguishers come?
Handheld and wheeled
CO2 is most effective for what class of fire/s?
Class B, C
CO2 is stored as a ___ ___ and converts to ___ when discharged
CO2 is discharge through a rubber or plastic ____
How does CO2 put out a fire?
Displacing O2 and smothering
What is the reach of a CO2 extinguisher?
Dry chemical and dry powder are the same thing
What are dry chemical extinguishers used for? (Classes)
Class A, B, C
What is the most common extinguisher used today?
What are the 2 types of dry chemical extinguishers?
Regular B, C rated
Multipurpose A, B, C rated
Dry chemical agents are nontoxic
Dry chemical agents may be mildly ___ to all surfaces
Dry chemical agents may produce a cloud which may reduce ____ and create a ____ ____
Dry chemical handheld units can either be ___ ____ or ___ ___
A constant pressure of ____ psi is maintained in the agent storage tank for dry chemical extinguishers
For dry chemical extinguishers, both cartridge and stored pressure will use what 2 gases?
CO2 or Nitrogen
Dry powder extinguishers are designed for class __ fires
Is there a single agent that will put out all combustible metal fires?
Some powdered agents are designed to be used with an extinguisher, others are designed to be applied with a....
Shovel or scoop
How do dry powder agents put out a class D fire?
Creates a smothering blanket over the metal
How should you apply dry powder to a fire?
Gently to avoid breaking the crust the forms over the metal
Class A and B extinguishers are also rated according to their ___ ___
Fire extinguisher ratings are determined by the ____ ___
Class A extinguishers are rated from ____ ___ through ___ ___
1A through 40A
Class A Extinguishers
For 1A rating ___ gallons of water is required
For 2A rating ___ gallons of water is required
1 1/4 gallons
2 1/2 gallons
Class B extinguishers
Ratings from ___ through ___
1B through 640B
Class B extinguishers are rated based on...
The approximate square footage of liquid a non expert can extinguish with one full extinguisher
A class C extinguisher confirms that it will not...
Class D extinguisher testing is based on...
The metal being tested
Class D instructions will be located...
On the faceplate of the extinguisher
Class K extinguishers have a wet chemical agent containing an ____ mixture
What 4 things should you inspect before using an extinguisher?
What does PASS stand for?
NFPA ___ requires extinguishers to be inspected at least __ time/s each year
Where can you check for the last inspection?
Recharge an extinguisher if it is deficient by...
Where will you find the extinguisher weight?
Stamped on the neck
How often should you shake dry chemical extinguisher to loosen the agent?
When should you clean an extinguisher?
After each use
TFD hydrostatically tests our extinguishers every ___ years