Portable fire extinguishers

With carbon dioxide extinguishers, the CO2 being expelled is quickly turned into a gas with what discharge temperature?

-110 degrees fahrenheit

What two additives do class B foam extinguishers use?

1. Aqueous film forming foam (AFFF) 2. film-forming flouroprotein (FFFP)

What are the three disadvantages of dry chemical type extinguishers?

1. chemicals are corrosive and damaging to electrical componenets 2. leaves a residue on surfaces 3. irritant to respiratory and eyes

What are the three advantages of dry chemical extinguishers?

1. doesnt freeze 2. non-conductive 3. effective on both class B and C fires

What extinguishing theories does carbon dioxide type extinguishers work on?

1. excludes oxygen 2. temperature reduction 3. disrupts the fuel's ability to vaporize

What 4 liquified gases make up halogenated extinguishing agents?

1. flourine 2. bromine 3. iodine 4. chlorine

What are the four disadvantages of carbon dioxide extinguishers?

1. heavier than other extinguishers 2. shorter range 3. doesnt work well when under 0 degrees or in windy conditions 4. not suitable for class A fires, pressurized fuel fires, or cooking grease fires

What combination of three chemicals do wet chemical extinguishers use?

1. pottasium acetate 2. pottasium carbonate 3. pottasium citrate

What are the five compounds used in dry chemical extinguishers?

1. sodium bicarbonate 2. pottasium bicorbonate 3. urea-based pottasium bicarbonate 4. pottasium chloride 5. ammonium phosphate

What are the two commonly used dry powders for dry powder extinguishers?

1. sodium chloride 2. mixture of graphite powder and phosphuros containing compounds

What are the four disadvantages of water type extinguishers?

1. splattering on class B fires 2. conducts electricity 3. violent reaction to combustible metals 4. freezes

What are the five types of water extinguishers?

1. stored pressure water extinguisher 2. loaded stream water extinguisher 3. wetting agent water extinguishers 4. pump tank water extinguishers 5. backpack water extinguishers

What are the six types of extinguishers?

1. water extinguishers 2. dry chemical extinguishers 3. carbon dioxide extinguishers 4. wet chemical extinguishers 5. halogenated-agent extinguishers 6. dry powder extinguishing agents

What are the disadvantages of foam extinguishers?

1. will freeze 2. condcts electricity 3. cannot be used in polar solvents 4. not suitable for pressurized fires or cooking oils

What are the two sizes of wet chemical type extinguishers available?

1.5 and 2.5 gallon

What year were halons limited in due to the montreal protocol?

1987

For every additional number on class B fire extinguishers, how much does that equate to in square feet of extinguishing capability?

1= 1 square foot 3= 3 square foot and so on...

For every additional number on class A fire extinguishers, how much does that equate to in gallons of water?

1A= 1.25 gallons of water 2A= 2.5 gallons and so on...

What is the most popular type of stored water pressure type extinguishers?

2.5 gallon with a 2-A rating

Per NFPA 10 on portable fire extinguishers, extinguishers shall be placed no less than how many inches from the floor?

4 inches

Per NFPA 10 the extinguishers cannot be further than BLANK from one another

75 feet apart

What exact pressure are carbon dioxide extinguishers stored under?

823 psi

What is the preferred extinguishing medium for class C fires?

CO2 when energized, can use water if it becomes un-energized

Foam extinguishers can be used on what two types of fires?

Class A and B

Which two classes of extinguishers are the only ones with numbered ratings?

Class A and B extinguishers

This type of fire involves ordinary combustibles such as: i. wood ii. rubbish iii. natural vegetation, brush, grass iv. plastics v. rubber

Class A fire

Ths type of fire includes flammable liquids, greases or gases such as: i. propane ii. gasoline iii. tar iv. oil v. some plastics

Class B fire

This type of fire includes energized electrical equipement such as: i. fuse boxes ii. breakers iii. power tools iv. televisions v. outlets vi. generators

Class C fire

This type of fire includes combustible metals such as: i. magnesium ii. titanium iii. zirconium iv. potassium

Class D fire

This type of fire includes cooking oils and fats

Class K fire

What are the two categories of halogenated agents?

HALONS and halocarbons

What are the two names for the halons used?

Halon 1211 and 1301

Which of the three occupancy classifications has class A and B combustibles in areas such as woodworking shops, kitchens and auto repair centers?

High hazard classification

What are the three types of occupancy classifications?

Low hazard moderate hazard high hazard

Which of the three occupancy classifications has mostly non-combustible materials, unlikely spread of fire in areas such as offices, classrooms and churches?

Low hazard classification

Which of the three occupancy classifications has more combustibles in it than low hazard areas such as parking garages, retail stores and light manufacturing?

Moderate hazard classification

What is the NFPA standard for portable fire extinguishers?

NFPA 10

what kind of gas is used inside of dry chemical extinguishers to pressurize and expell the chemicals?

Nitrogen

For use of a fire extinguisher, what does the acronym PASS stand for?

P-pull the pin A-aim the nozzle at the base of the fire S-squeeze the handle S-sweep the fire

The montreal protocol in 1987 was an international agreement signed by what countries?

US and 24 other countries

What is to be used to extinguish a class K fire?

a new type of wet chemical extinguisher

What indicates that an extinguisher is not suited for a specific type of fire?

a red slash through the picture of the fire class not suited for the extinguisher

What can two smaller sized extinguishers not take the place of per NFPA 10?

a requirement for a larger one

What kind of nozzles do foam extinguishers have?

air aspirating

What do loaded stream fire extinguishers have that decreases the freezing temperature of water inside?

alkali metal salt

Extinguishers must be inspected once a month by whom?

an outside party

What kind of extinguisher is primarily used for brush fires?

backpack water type extinguisher

What is the shape and color for class C extinguishers in the traditional system?

blue circle

What is the picture used for class A extinguishers in the pictograph system?

burning trash can beside a wood fire

What kind of extinguishers have a tubular horn mounted at the end of a horn?

carbon dioxide extinguishers

When a rating is given that means the extinguisher can do what two things?

completely extinguish the fire and prevent a rekindling

What component is the body of the extinguisher that holds the extinguishing agent?

cylinder

Wet chemical extinguishers were designed to put out what specific kind of fires?

deep fryer fires

What major negative aspect do using halon agents have?

depletion of the ozone layer

What is the preferred medium for extinguishing class B fires?

dry chemical/CO2

Dry chemical, halogenated, and dry powder extinguishers must be hydrostatically tested how often?

every 12 years

Water, wet chemical and CO2 extinguishers must be hydrostatically tested how often?

every 5 years

What is the picture used for class K extinguishers in the pictograph system?

fire in a frying pan

What is the picture used for class B extinguishers in the pictograph system?

flame and a gasoline can

What is the picture used for class C extinguishers in the pictograph system?

flame and an electrical plug and socket

What is the shape and color for class A extinguishers in the traditional system?

green triangle

Which component is used to carry the extinguisher (all extinguishers over 3 pounds have one)

handle

What extinguishing theory do halogenated extinguishers work on?

inhibit the chemical chain reaction

What extinguishing theory do class B extinguishers work on?

inhibits chemical chain reaction and excludes oxygen by forming a crust

How does the weight of carbon dioxide compare to that of air?

it is 1.5 times heavier

What does the traditional lettering system for extinguishers use?

letters, shapes and colors

Per NFPA 10 cabinets that house extinguishers cannot be what?

locked

What component is the pin that is used to prevent accidental discharge called?

locking mechanism

How often does OSHA require extinguishers to be inspected?

monthly

The added alkali-salt solution to loaded stream water type extinguishers lowers the freezing point to what?

negative 40 degrees fahrenheit

Per NFPA 10 on portable fire extinguishers, extinguishers over 40 pounds shall be placed how on the wall?

no more than 3 and 1/2 feet above the floor

Per NFPA 10 on portable fire extinguishers, extinguishers up to 40 pounds shall be placed how on the wall?

no more than 5 feet above the floor

What is the picture used for class D extinguishers in the pictograph system?

no picture

What does the powder that comes out of class B extinguishers look like?

non-toxic yellowish green or white powder

The component where the agent is expelled through

nozzle or horn

Per NFPA 10 every occupancy shall have how many extinguishers regardless of size?

one

What is the proper method for extinguishing flammable metals?

picking the right dry powder that are specific to the type of metal burning

What does the pictograph labeling system for fire extinguishers use?

pictures inside of squares

what is the gauge that reads whether the extinguisher has enough stored pressure to operate properly?

pressure indicator

What is the shape and color for class B extinguishers in the traditional system?

red square

The conversion of fatty acids in cooking oils to soap or foam is called what?

saponification

Wetting agent class A and class B foam type extinguishers should not be stored under what temperature?

should not be stored under 40 degrees fahrenheit

What extinguishing theory do water extinguishers work on?

temperature reduction

What do the numbers on extinguishers represent?

the extinguishing potential or effectiveness

Per NFPA 10, where shall the labels be facing on all extinguishers?

the front

What company develops the standards, classifications and rating system for extinguishers?

underwriters labrotories

What is the last type of extinguishing medium you want to put on burning metals?

water

What is the most common extinguishing medium for class A fires?

water

What type of solution do foam extinguishers discharge?

water based with measured amount of foam in it

Carbon dioxide extinguishers do not have gauges but are BLANK to determine the amount of agent left

weighed

What is the only type of extinguishers qualified for class K fires?

wet chemicals

Class A foam is used as what kind of agent?

wetting agent

This type of fire extinguisher is usually used for large applications and contain between 150 and 350 pounds of agent

wheeled fire extinguishers

What is the shape and color for class D extinguishers in the traditional system?

yellow star