IFSTA 7 - Chapter 6 - Portable Fire Extinguishers

What action should be taken if an entire extinguisher is discharged but the fire is not extinguished? Select one: a.Withdraw and reassess the situation b.Try to use a different class of fire extinguisher c.Wait a moment and try another extinguisher of the same class d.Notify a supervisor and stand by for further instruction

a. Withdraw and reassess the situation

When operating a portable fire extinguisher,: Select one: a.aim the nozzle at the base of the fire. b.aim the nozzle at the top of the fire. c.move the nozzle up and down near the center of the fire. d.move the nozzle around in a circular pattern.

a. aim the nozzle at the base of the fire.

A Class D fire should be extinguished using a: Select one: a.dry powder extinguisher. b.dry chemical extinguisher. c.clean agent extinguisher. d.carbon dioxide extinguisher.

a. dry powder extinguisher.

The air-aspirating foam nozzle used with an aqueous film forming foam (AFFF) extinguisher produces: Select one: a.higher quality foam than a standard extinguisher nozzle. b.foam that is ideal for fighting Class A fires. c.lower quality foam than a standard extinguisher nozzle. d.foam that is ideal for fighting Class D fires.

a. higher quality foam than a standard extinguisher nozzle.

An empty portable fire extinguisher should be: Select one: a.laid on its side. b.set inside the apparatus cab. c.sent to the manufacturer to be refilled. d.placed upright next to the full extinguishers.

a. laid on its side.

A portable fire extinguisher must be labeled with the: Select one: a.letters and/or symbols that designate its class rating. b.colors that designate its class rating. c.type of PPE required to be worn while operating. d.name of the purchasing department.

a. letters and/or symbols that designate its class rating.

Class K rated extinguishers work because of _____, which converts fatty acids into a soapy film. Select one: a.saponification b.cooling c.smothering d.chemical flame inhibition

a. saponification

Which extinguisher would be effective for use on a burning puddle of gasoline at a vehicle incident? Select one: a.Clean agent extinguisher b.Aqueous film forming foam (AFFF) extinguisher c.Stored-pressure water extinguisher d.Dry powder extinguisher

b. Aqueous film forming foam (AFFF) extinguisher

What do manufacturers sometimes add to stored-pressure water extinguishers in order to increase their effectiveness? Select one: a.Class D foam b.Class A foam c.Dry chemical d.Dry powder

b. Class A foam

On which type of fires are stored-pressure water mist extinguishers safe and effective to use? Select one: a.Class B b.Class C c.Combustible cooking oil fires d.Combustible metal fires

b. Class C

What types of materials do Class B fires involve? Select one: a.Wood and paper b.Combustible liquids and gases c.Cooking oils d.Energized electrical equipment

b. Combustible liquids and gases

What is the first step in the PASS application method of operating a portable fire extinguisher? Select one: a.Pick up the extinguisher and walk toward the fire. b.Pull the pin to break the thin wire or plastic seal. c.Point the nozzle at the top edge of the fire. d.Position downwind of the fire.

b. Pull the pin to break the thin wire or plastic seal.

Which method of fire extinguishment forms an oxygen-excluding soapy foam over the surface of the burning material? Select one: a.Cooling b.Saponification c.Smothering d.Chemical flame inhibition

b. Saponification

Which material is a Class A combustible material? Select one: a.Electrical equipment b.Wood c.Gasoline d.Vegetable

b. Wood

When applying a dry powder agent, it is important to: Select one: a.only use a wheeled unit to apply the agent. b.avoid breaking the crust that forms over the burning material. c.avoid the ice crystals that form around the discharge nozzle. d.apply the agent as quickly and forcefully as possible.

b. avoid breaking the crust that forms over the burning material.

Class K fires involve: Select one: a.energized electrical equipment. b.cooking oils. c.combustible metals. d.wood and paper products.

b. cooking oils.

Every portable fire extinguisher must be labeled with: Select one: a.a placard that details the hazardous chemical contained within. b.letters and/or symbols that identify the type of fire for which it is intended. c.a color-coded label identifying the extinguishing agent contained within. d.a printed label identifying the purchasing department and purchase date.

b. letters and/or symbols that identify the type of fire for which it is intended.

In a(an) _____ extinguisher, compressed air or inert gas within the container forces the agent out of the extinguisher nozzle when the operator presses the handle. Select one: a.manual pump b.stored-pressure c.automatic pump d.pressure cartridge

b. stored-pressure

After selecting the appropriate extinguisher to use on a fire, the firefighter should: Select one: a.aim the nozzle at the base of the fire. b.visually inspect the extinguisher. c.proceed immediately to the fire and stand by. d.squeeze the handles and release the agent on the fire.

b. visually inspect the extinguisher.

Stored-pressure water extinguishers are used on Class _____ fires. Select one: a.B b.D c.A d.C

c. A

What is a characteristic of carbon dioxide (CO2) extinguishers? Select one: a.Most effective in extinguishing Class D fires b.CO2 gas cools the fire to subzero temperatures c.CO2 gas displaces oxygen to smother the fire d.Require freeze protection due to icy discharge

c. CO2 gas displaces oxygen to smother the fire

Which type of extinguishing agent is used to extinguish a Class B fire? Select one: a.Dry powder b.Deionized water c.Carbon dioxide d.Wet chemical

c. Carbon dioxide

A _____ extinguisher should be used in areas with highly sensitive computer equipment because it will cause less damage to the equipment than other extinguishers. Select one: a.Class C b.Class D c.Clean agent d.Carbon dioxide (CO2)

c. Clean agent

Where would a clean agent extinguisher likely be used? Select one: a.Structure fire b.Vehicle fire c.Computer room fire d.Commercial kitchen fire

c. Computer room fire

Which material is a Class B fuel? Select one: a.Lithium b.Vegetable oil c.Gasoline d.Live electrical wires

c. Gasoline

How does chemical flame inhibition work to extinguish fire? Select one: a.Reduces burning material's temperature b.Excludes oxygen from the burning process c.Interrupts the chemical chain reaction in the burning process d.Forms oxygen-excluding soapy foam surface on burning material

c. Interrupts the chemical chain reaction in the burning process

Which statement about using a portable fire extinguisher on an incipient stage fire is accurate? Select one: a.After the fire diminishes, move farther away to achieve final extinguishment. b.In order to stop the flow of the extinguishing agent, the pin must be put back in place. c.Operating close to the fire can scatter solid fuel or penetrate the surface of liquid fuel. d.Liquid fuel fires should only be fought with one portable extinguisher at a time.

c. Operating close to the fire can scatter solid fuel or penetrate the surface of liquid fuel.

Where is a Class K fire likely to be found? Select one: a.Computer storage facility b.Vehicle accident c.Restaurant d.Lumberyard

c. Restaurant

Pump-type water extinguishers are intended primarily for use on: Select one: a.Class D fires. b.Class B fires. c.ground cover fires. d.energized electrical equipment.

c. ground cover fires.

When an extinguishing agent is determined to be safe and effective for use on combustible metals, it will: Select one: a.be a different color than extinguishers designed to extinguish other classes of fire. b.be given a numerical rating based upon the amount of fire it can extinguish. c.include application instructions on the faceplate. d.include the test results on the faceplate.

c. include application instructions on the faceplate.

When operating a portable fire extinguisher, it is safest to approach the fire: Select one: a.with the wind blowing toward you. b.at a 45-degree angle. c.with the wind at your back. d.with your back to the fire.

c. with the wind at your back.

How would a fire containing plastics be classified? Select one: a.Class C b.Class K c.Class D d.Class A

d. Class A

Wet chemical stored-pressure extinguishers are intended for use on _____ fires. Select one: a.Class D b.Class A c.Class B d.Class K

d. Class K

In which situation would a dry chemical extinguisher be MOST effective? Select one: a.Magnesium fire b.Fire in a deep fryer at a restaurant c.Titanium fire d.Fuel spill fire at a vehicle accident

d. Fuel spill fire at a vehicle accident

_____ is an example of a Class D fuel. Select one: a.Alcohol b.Gasoline c.Animal fat d.Magnesium

d. Magnesium

Which statement about Class C fires is accurate? Select one: a.Class C fires contain combustible metals and alloys such as titanium, lithium, or magnesium. b.Class C fires are rated from 1-C through 40-C and can be extinguished using a Class C extinguisher with the same rating. c.Class C fires should be extinguished using a specialized wet chemical system. d.Once the electricity has been shut off to a Class C fire, it may be treated as a Class A or Class B fire.

d. Once the electricity has been shut off to a Class C fire, it may be treated as a Class A or Class B fire.

Which statement about dry chemical extinguishers is accurate? Select one: a.Dry chemical agents are extremely toxic to humans. b.Dry chemical agents must be applied using a shovel. c.Dry chemical extinguishers must be used in conjunction with foam. d.Particles of the agent may become airborne during application.

d. Particles of the agent may become airborne during application.

When in position to attack the fire, what is the first step that should be taken when using a portable fire extinguisher? Select one: a.Sweep the nozzle back and forth to cover the material. b.Aim the nozzle at the base of the fire. c.Squeeze the handles to test the extinguisher and release the agent. d.Pull the pin and break the wire or seal.

d. Pull the pin and break the wire or seal.

Which statement about using a portable fire extinguisher is accurate? Select one: a.Pressing the extinguisher handles three times will stop the flow of the agent. b.Portable fire extinguishers should be used in place of a hose line on all incipient fires. c.The extinguisher operator should stand as close to the burning material as possible. d.Wind can limit the reach of the extinguishing agent after it is expelled.

d. Wind can limit the reach of the extinguishing agent after it is expelled.

Class A portable fire extinguishers are rated from 1-A through 40-A based upon the amount of water and: Select one: a.whether the portable extinguisher is certified for novice use. b.the weight and height of the portable extinguisher. c.whether the portable extinguisher is intended for indoor or outdoor use. d.duration and range of discharge used in extinguishing test fires.

d. duration and range of discharge used in extinguishing test fires.

Class C fires involve: Select one: a.combustible liquids and gases. b.regular combustibles such as wood. c.combustible metals. d.energized electrical equipment.

d. energized electrical equipment.

A _____ extinguisher requires the operator to apply pressure to a pump that increases pressure within the container and forces the agent out the nozzle. Select one: a.manual cartridge b.pressure cartridge c.stored pressure d.manual pump

d. manual pump

When selecting the appropriate type of portable fire extinguisher to use for a situation, it is important to consider: Select one: a.the time of day. b.whether a foam agent is available. c.how many times the extinguisher has been refilled. d.the class of fuel that is burning.

d. the class of fuel that is burning.

Portable fire extinguishers are classified according to the: Select one: a.amount of time they have been in service. b.place where they were manufactured. c.certification level required to operate them. d.type of fire they are designed to extinguish.

d. type of fire they are designed to extinguish.

Which is a Class D combustible material? Select one: a.Sodium b.Vegetable oil c.Plastic d.Alcohol

a. Sodium

What should be the next step after choosing the appropriate fire extinguisher for a fire? Select one: a.Inspect the extinguisher to make sure it is charged and operable. b.Pick up the extinguisher and carry it toward the fire. c.Pull the pin to break the seal. d.Refill the extinguisher so it is ready to operate.

a. Inspect the extinguisher to make sure it is charged and operable.

Which type of extinguisher is intended to be used on a Class B fire? Select one: a.Aqueous film forming foam extinguisher b.Pump-type water extinguisher c.Stored-pressure wet chemical extinguisher d.Stored-pressure water-mist extinguisher

a. Aqueous film forming foam extinguisher

Which factor should be considered when selecting the appropriate type of extinguisher to use on a given fire? Select one: a.Classification of the burning fuel b.Age of the extinguisher c.PPE available to the operator d.Time of day

a. Classification of the burning fuel

Which extinguishing agent should be used for a Class D fire? Select one: a.Dry powder b.Wet chemical c.Dry chemical d.Class D foam

a. Dry powder

Which method of extinguishment excludes oxygen from the burning process? Select one: a.Smothering b.Saponification c.Chemical flame inhibition d.Cooling

a. Smothering