Fire Extinguishers Flashcards
If a private residence has a single fire extinguisher, where should it be located?
Kitchen
What is the advantage of portable fire extinguishers over hose lines?
Faster deployment
Which class of fire includes cloth?
A
What is the most commonly used extinguishing agent for Class A fires?
Water
Which extinguishing agent is suitable for use on a Class C fire?
Carbon Dioxide
The traditional symbol for a Class D fire extinguisher is a(n)
Yellow Star
Which class of fire extinguisher includes a number in its classification?
A
A Class C extinguisher is rated for use on ___.
energized electrical equipment
Which statement about the numerical rating of a Class K extinguisher is correct?
A) There is no numerical rating for a Class K extinguisher
B) The numerical rating indicates the relative extinguishing power of the agent
C) The numerical rating indicates the relative duration of the agent
D) A numerical rating is required for commercial hood systems
A) There is no numerical rating for a Class K extinguisher
What residue does a CO2 fire extinguisher leave when discharged?
None
In general, the maximum reach of a CO2 extinguisher is __ feet.
8
What is the difference between dry powder and dry chemical extinguishing agents?
Each is rated for a different class of fire.
Which agent is approved for use in a Class K system?
Wet Chemical
What is used to pressurize a stored-pressure water extinguisher?
Compressed Air
Class D agents work primarily by ___.
forming a crust over the fuel
A Class A fire extinguisher with a numerical rating of 2 contains __ gallons of water
2.5
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
Which class of fire is depicted in the pictograph system by a burning trash can next to a wood fire?
A
Which extinguishing method is being used when a foam blanket is placed over the surface of a burning liquid?
Cutting off the oxygen supply
What is the primary extinguishing mechanism of dry chemical agents?
Interrupting the chemical chain reaction
How do multipurpose dry chemical agents prevent rekindling of a Class A fuel?
By forming a crust over the fuel
What is one disadvantage of CO2 extinguishers?
Short discharge range
A Class B foam extinguisher is NOT rated for which fuel?
A) Gasoline
B) Diesel Fuel
C) Cooking Oil
D) Paint Thinner
C) Cooking Oil
A Class K agent’s effect on the fuel is known as ___.
Saponification
Which class of fire involves combustible metals?
D
Which class of fire involve combustible cooking oils and fats?
K
What does a rating of 40 on a Class B extinguisher mean?
Sufficient extinguishing power for 40 square feet of burning fuel
Which class of fire is depicted in the pictograph system by a flame and an electrical plug and socket?
C
Which class of fire is depicted in the pictograph system by a flame and gasoline can?
B
Which class of fire is depicted in the pictograph system by a fire in a frying pan?
K
Which fire extinguishing agent is best for use on sensitive electrical equipment?
Carbon Dioxide
The weight of carbon dioxide is about ___ the weight of air.
1.5x
The “P” in the acronym PASS, used in reference to the fire extinguisher operation, stands for ___.
Pull
