North
Portable fire extinguishers are classified according to the
type of fire they are designed to extinguish.
Which type of extinguishing agent is used to extinguish a Class B fire
Carbon dioxide
Class K fires involve:
cooking oils.
Pump-type water extinguishers are intended primarily for use on:
ground cover fires.
Which extinguisher would be effective for use on a burning puddle of gasoline at a vehicle incident?
Aqueous film forming foam (AFFF) extinguisher
A portable fire extinguisher must be labeled with the:
letters and/or symbols that designate its class rating
Which statement about Class C fires is accurate?
Class C fires should be extinguished using a specialized wet chemical system.
Class C fires contain combustible metals and alloys such as titanium, lithium, or magnesium.
Once the electricity has been shut off to a Class C fire, it may be treated as a Class A or Class B fire.
Class C fires are rated from 1-C through 40-C and can be extinguished using a Class C extinguisher with the same rating.
Once the electricity has been shut off to a Class C fire, it may be treated as a Class A or Class B fire
Class K rated extinguishers work because of fatty acids into a soapy film. which converts
saponification
Stored-pressure water extinguishers are used on Class fires.
Class A
The air-aspirating foam nozzle used with an aqueous film forming foam (AFFF) extinguisher produces:
higher quality foam than a standard extinguisher nozzle.
How would a fire containing plastics be classified?
Class A
_______is an example of a Class D fuel.
Magnesium
Which method of extinguishment excludes oxygen from the burning process?
Smothering
What do manufacturers sometimes add to stored-pressure water extinguishers in order to increase their effectiveness?
Class A foam
Where would a clean agent extinguisher likely be used?
Vehicle fire
Structure fire
Computer room fire
Commercial kitchen fire
Computer room fire
Class A portable fire extinguishers are rated from 1-A through 40-A based upon the amount of water and:
duration and range of discharge used in extinguishing test fires.
Which extinguishing agent should be used for a Class D fire?
. Dry powder
How does chemical flame inhibition work to extinguish fire?
Interrupts the chemical chain reaction in the burning process
On which type of fires are stored-pressure water-mist extinguishers safe and effective to use?
Class C
What is a characteristic of carbon dioxide (CO2) extinguishers?
CO2 gas displaces oxygen to smother the fire
Which material is a Class B fuel?
Gasoline
When an extinguishing agent is determined to be safe and effective for use on combustible metals, it will:
Include application instructions on the faceplate.
A _ extinguisher requires the operator to apply pressure to a pump that increases pressure within the container and forces the agent out the nozzle. (2
Manual pump
Wet chemical stored-pressure extinguishers are intended for use on fires.
D. Class K
In which situation would a dry chemical extinguisher be MOST effective?
Titanium fire
Magnesium fire
Fuel spill fire at a vehicle accident
Fire in a deep fryer at a restaurant
Fuel spill fire at a vehicle accident