Fire Extinguishers
How many gallons (L) of water are required for a 1-A rating?
1 1/4 gallons (5 L)
How much is the nonexpert expected to extinguish with a Class B extinguisher for each numerical value of the extinguisher rating?
1 square foot (0.09 square meters)
What surface area of a deep fryer using vegetable must the extinguisher be capable of extinguishing to meet the minimum criteria for the Class K rating?
2.25 square feet (0.2 square meters)
What is the discharge time found on the wheeled carbon dioxide extinguisher?
26-65 seconds
Which statement about using a portable fire extinguisher is NOT correct?
A charged hoseline should be used at the same time
How often does NFPA 10 require that portable fire extinguishers be inspected as a minimum?
Annually
Which type of extinguisher is best suited for combating fires in small liquid fuel spills?
Aqueous film forming foam
What is the rating of a regular dry chemical extinguisher?
B-C
3. Which of the following can be used on Class D fires?
B.) Dry powder extinguishers
How should the agent stream be directed when using a dry chemical extinguisher?
Back and forth
Which of the following is NOT a consideration when approaching a fire with a carbon dioxide extinguisher?
Backup line in place
Where should the nozzle of the stored-pressure water extinguisher be pointed on the fire?
Base of the fire
Which of the following is NOT considered a clean agent?
Bromotrifluoromethane
What is used as the pressurizing gas in dry chemical handheld extinguishers?
Carbon dioxide
What is the primary extinguishment method of dry chemicals?
Chain inhibition
Which type of fuel can the stored-pressure water extinguisher be used on?
Class A
What type of fire can Class C fires be treated as once the power supply has been turned off?
Class A or B
Which is NOT one of the three most common combinations with portable fire extinguishers?
Class A-B-C-D
Which class of fire are aqueous film forming foam extinguishers most effective on?
Class B
Which type of fire involves combustible liquids and gases
Class B
Which class of portable fire extinguisher is tested to determine nonconductivity?
Class C
On what class fires is the wet chemical stored-pressure extinguisher intended to be used on?
Class K
Which of the following types of fire is extinguished using wet chemical systems and portable fire extinguishers?
Class K
What is the first thing that should be done if a small amount of burning metal is on a combustible surface?
Cover the fire with powder
What is used in the water-mist stored-pressure extinguisher that allows it to be used on energized electrical equipment?
Deionized water
Which statement about dry chemical extinguishers is NOT correct?
Dry chemicals used in the extinguisher are not compatible with foam
At what level must the firefighter know classifications of types of fires?
Firefighter I
How should you approach the fire when you will be using a portable fire extinguisher?
From the windward side
Which of the following should be worn any time you will be using a portable fire extinguisher?
Full structural PPE
What is the pump-type water extinguisher primarily intended to be used on?
Ground cover fire
What should be done with empty portable fire extinguishers at the scene?
Lay them on their side
What is stored in a tank along with the water in a stored-pressure water extinguisher?
Nitrogen
What is the first thing that should be done once the portable fire extinguisher has been selected?
Perform a visual inspection
What is used in the NFPA standard to identify portable fire extinguishers?
Pictographs
What action does the operator take to use a stored pressure extinguisher?
Press the handle
Which is NOT a correct statement about portable fire extinguishers?
Pull the pins when the extinguishers may be used
What should be used to remove any corrosion from the portable fire extinguisher?
Sand paper
Which method of extinguishment will form an oxygen-excluding soapy foam surface?
Saponification
How often should the dry chemical extinguishing agent be emptied and the extinguisher refilled?
Six years
How does the carbon dioxide extinguisher put out the fire?
Smothering
Which type of extinguisher is useful for all types of small Class A fires?
Stored-pressure water extinguisher
What is the first thing that should be done when operating the dry chemical wheeled extinguisher?
Stretch out the hose completely
What is the last step taken when using a dry chemical extinguisher?
Tag the extinguisher for recharge and inspection
What should be done after the pin has been pulled to break the inspection band on the stored-pressure extinguisher?
Test the extinguisher with a very short burst
What is used to classify types of portable fire extinguishers?
The type fire of they are designed to effectively extinguish
What part of the dry chemical wheeled extinguisher should be pointed away from personnel when pressurizing the unit?
Top
Which of the following is NOT a criteria that should be used when selecting the proper fire extinguisher?
Type of occupancy
What color emissions will be seen that would indicate a Class D fire?
White
