Chapter 7 Fire Extinguishers Flashcards
Combustion begins when a fuel is heated to its
Ignition temperature
Dry chemical extinguishers may be used on Class C fires because they
Do not conduct electricity
For an extinguishing agent to be approved for use on energized electrical equipment it must
Not conduct electricity
For the purpose of extinguisher selection and placement, a woodworking shop is an _____ hazard environment
Extra
For the purpose of extinguisher selection and placement, light hazard environments may contain a limited amount of combustibles of which class
B
For the purpose of extinguisher selection and placement, what is an example of a light hazard environment
Classroom
To qualify as a light hazard for the purpose of extinguisher selection and placement, the majority of materials in the area must
Be low combustibility
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 unsafe
Which is a primary factor when determining hazard classification for extinguisher selection and placement
Amount of combustibles present
A Class A fire extinguisher with a numerical rating of 2 contains _____ of water
2.5 gal
A Class K agents effect on the fuel is know as
Saponification
A portable fire extinguisher is best suited for which situation
Fire in a wastebasket
Class B foam fire extinguishers are also effective on
Class A fires
For an area to qualify for the classification of “light hazard” most of the combustibles present must be
Arranged so that a fire is unlikely to spread
Which fire extinguishing agent is best for use on sensitive electronic equipment
Carbon dioxide
