Fire Extinguisher

Requirements for placing and mounting portable fire extinguishers are found in NFPA ____.

10

Class A fire extinguisher with a numerical rating of 2 contains ___ gallons of water.

2.5

The hydrostatic test interval for a dry chemical extinguisher with a stainless steel shell in every ___ years.

5

In general, the maximum reach of a Co2 extinguisher is ___ feet.

8

What compound is added to a water extinguisher to improve penetration of fuel?

A wetting agent

To qualify as a light hazard for the purpose of extinguisher selection and placement, the majority of materials in the area must ________.

Be noncombustible

The traditional symbol for a class C fire extinguisher is a(n) ___.

Blue circle

Aqueous Film Forming Foam (AFFF) Extinguishing agents are applicable to ___ fires.

Both Class A and B

How do multipurpose dry chemical agents prevent rekindling of Class A fuel?

By forming a crust over the fuel

What extinguishing agents is suitable for use on a Class C Fire?

Carbon dioxide

What fire extinguishing agent is best for use on sensitive electronic equipment ?

Carbon dioxide

There are two basic designs for hand held dry chemical extinguishers:

Cartridge and stored pressure

A green triangle containing a letter would indicate an extinguisher to be used on ____ fires.

Class A

What class of fire extinguisher includes a number in its classification?

Class A

What class of fire includes cloth?

Class A

What class of fire is depicted in the pictograph system by a burning trash can next to a wood fire?

Class A

For the purpose of extinguisher selection and placement, light hazard environments usually contain a limited amount of combustibles of which class?

Class B

What class of fire includes flammable and combustible liquids?

Class B

What class of fire is depicted in the pictograph system by a flame and gasoline can?

Class B

Halon fire extinguishers are primarily designed for use on ____ fires

Class B and C

Regular dry chemicals (sodium bicarbonate-based and potassium-based) work on __________ fires.

Class B and C

What statement about foam fire extinguishers is correct?

Class B foam extinguishers may be used to some effect on class A fires

What class of fire involves energized electrical equipment?

Class C

What class of fire is depicted in the pictograph system by a flame and an electrical plug and socket?

Class C

Fire involving combustible metals such as magnesium, titanium, zirconium, sodium and potassium, are ____ fires.

Class D

What class of fire involves combustible metals?

Class D

What class of fire involves combustible cooking oils and fats?

Class K

What class of fire is depicted in the pictograph system by a fire in a frying pan?

Class K

What advantage does a Co2 have over a dry chemical extinguisher?

Co2 does not leave a residue or corrode electical contacts

The Aqueous Film Forming Foam (AFFF) portable fire extinguishers use what means for expelling their contents?

Compressed air

A Class B foam extinguisher is not rated for ___.

Cooking oil

What extinguishing method is being used when a foam blanket is placed over the surface of a burning liquid?

Cutting off the oxygen supply

A fire extinguisher's agent is stored within its ___.

Cylinder

The use of halon agents is strictly controlled because it:

Damages the ozone layers

What is the preferred method of applying dry chemical agents to flammable liquid spill fires to:

Direct the stream at the base of the fire using a sweeping motion

What type of portable fire extinguishers is least likely to expose the operator to electrical shock?

Dry chemical

What statement is correct about dry chemical agents?

Dry chemical agents are not subject to freezing

What is the difference between dry powder and dry chemical extinguishing agents?

Each is rated for a different class of fire

A class C extinguisher is rated for use on ______.

Energized electrical equipment

When approaching a fire with an extinguisher in hand, you should always have a(n) ____.

Exit route

What is the term for the substance that puts out the fire?

Extinguishing agent

For the purpose of extinguisher selection and placement, a woodworking shop is a(n) ___ hazard environment.

Extra

What hazard category includes automative service or repair facilities?

Extra

What is an advantage of portable fire extinguishers over hose lines?

Faster deployment

A portable fire extinguisher is best suited for which situation?

Fire in a wastebasket

Class D agents work primarily by ____.

Forming a crust over the fuel

The skill of operating a fire extinguisher is fairly easy in ___ basic steps?

Four

The traditional symbol for a class A fire extinguisher is a(n) ____.

Green triangle

The use of halon 1211 is strictly controlled because it is ____.

Harmful to the environment

Combustion begins when a fuel is heated to its ___.

Ignition point

How should an extinguisher with a fixed nozzle be carried when approaching a fire?

In the favored hand

Halogenated agents extinguish fire by

Interrupting chain reaction

What is the primary extinguishing mechanism of dry chemical agents?

Interrupting the chemical chain reaction

What feature of some carbon dioxide extinguishers makes them makes them dangerous for use on class c fires ?

Metal horn

What residue does a Co2 fire extinguisher leave when discharged?

None

According to NFPA 10, the maximum floor area that can be protected by each extinguisher depends on the ____.

Occupancy type

Class K fire involve:

Oils and greases found in commercial kitchens

What is one of the three basic components required for Fire?

Oxygen

The acronym the four step process for proper use of fire extinguishers is:

PASS

What is the term for a water soluble flammable liquid?

Polar solvent

The "P" in the acronym PASS, used in reference to fire extinguisher operation, stands for ____.

Pull

The traditional symbol for a class B fire extinguisher is a(n) ___.

Red square

A loaded stream extinguisher is designed to ______.

Resist freezing

A class K agent's effect on the fuel is known as _______.

Saponification

What is one disadvantage of Co2 extinguishers?

Short discharge range

What is the best way to extinguish a class C fire?

Shut off the power and treat it as a Class A or B fire

What is a correct use for a portable fire extinguisher?

Situations in which the use of water is not recommended

A carbon dioxide (co2) extinguisher's means of discharge is:

Stored liquefied compressed gas

What does a rating of 40 on a Class B extinguisher mean?

Sufficient extinguishing power for 40 square feet of burning fuel

What does a rating of 40 on a class B extinguisher mean?

Sufficient extinguishing power for 40 square feet of burning fuel

All fire extinguishers are classified according to ______.

The classes of fire on which they are effective

The greatest concern associated with selecting too small of an extinguisher is that:

The operator has to get closer to the fire

What about class D extinguishing agents is correct?

The specific agent must be matched to the specific fuel

What statement about the numerical rating of a class k extinguisher is correct?

There is no numerical rating for a class k extinguisher

What about fire extinguishers and combustible metals is correct?

There no single agent will control or extinguish fires in all combustible metals.

For the purpose of fire extinguisher placement, what is the relationship between occupancy use category and hazard classification?

They are not necessarily related

Fire fighters should only rely on fire extinguishers carried on fire apparatus.

True

What motion best accomplishes the removal of the pin and tamper seal from a portable fire extinguisher?

Twisting motion

What is the best position to attack a fire with a portable extinguisher?

Upwind, with exit path behind you

What does it mean when a fire extinguisher has a pictograph with a red slash through it?

Use on that class of fire could be hazardous

What is the most commonly used extinguishing agents for class A fires?

Water

What agent is approved for use in a class K system?

Wet chemical

The traditional symbol for a class D fire extinguisher is a(n) ___.

Yellow star

The traditional symbol for a class D fire extinguishers is a(n) ____.

Yellow star

Extinguishing agents safe for use on fires in or near energized electrical equipment include:

carbon dioxide and dry chemical

For the purpose of extinguisher selection and placement, what is an example of a light hazard environment?

classroom

What is used to pressurize a stored-pressure water extinguisher?

compressed air

Dry chemical extinguishers may be used on class C fires because they ___.

do not conduct electricity

A potential problem with application of a multipurpose dry chemical agent to a class K fire is ___.

neutralization of other agents applied to the fire

A class C agent must _______.

not conduct electricity

The weight of carbon dioxide is about ___ the weight of air.

one and a half times

All portable fire extinguishers use which means for expelling their contents?

pressure

For an extinguishing agent to be rated for a particular class of fire, it must ____.

prevent rekindling

Pump tank extinguishers are used to apply:

water

When a dry chemical extinguisher should be serviced and charged?

After any discharge

When approaching a fire stored- pressure water extinguishers are designed to be discharged with the nozzles:

Aimed at the bases of the fire

What is a substance commonly used as a dry chemical extinguishing agent?

Ammonium phosphate

What is the agent rated for use on class A fires?

Ammonium phosphate

What is a primary factor when determining hazard classification for extinguisher selection and placement?

Amount of combustibles present

Water type extinguishers exposed to weather below 40 degrees require ___ to be added.

Anti- freeze

For an area to qualify for the classification of "light hazard," most of the combustible present must be ___.

Arranged so that a fire is unlikely to spread

For an extinguishing agent to be approved for use on energized electrical equipment, it must ____.

be electrically nonconductive

Bromochlorodifluoromethane is a _________ agent.

halogenated

If a private residence has a single fire extinguisher, where should it be located?

kitchen

What expels the extinguishing agent from a pump tank water extinguisher?

manual effort