Transcript Objective 08.03 - R-S Central High School

Objective 08.03
• Discuss conditions necessary for
combustion and the appropriate type of fire
extinguisher for each class of fire.
The Fire Triangle
• Components necessary for a fire to take
place.
• Fuel – any combustible material that will
burn
– Oily rags
– Sawdust
– paper
The Fire Triangle
• Heat-most materials will burn if they are
made hot enough
• Oxygen-gas in the atmosphere that is not a
fuel, but must be present for fuels to burn
The Fire Triangle
Fuel
oxygen
Heat
Fire Prevention
• Take away one of the components of the
fuel triangle and fire will not start or will
stop if it has started
• Safe storage of fuels is the easiest fire
prevention technique
• Clean shop facilities also decrease the
chance of fire
Fire Extinguishers
• Know the kind of fire extinguisher that is used for
different kinds of fire prior to the fire.
• Know the placement of fire extinguishers so that
time is not taken looking for the extinguisher if a
fire occurs
• Fire extinguishers should be hung on walls within
easy reach in areas where fires would most likely
occur
Fire Extinguishers
• Know how to use the fire extinguisher
– Generally, extinguishers are held upright, the
ring pin is pulled and a lever is pressed
– The nozzle of the extinguisher is directed
toward the base of the fire to discharge the
extinguisher
Smothering a Fire
• Best used on a person whose clothes are on
fire
• Wrap the person in a blanket to cut the
oxygen off to the fire
Classes of Fires
• Class A: ordinary combustibles
–
–
–
–
Wood
Papers
Trash
Wouldn’t include any item in the presence of
electricity or any type of liquid
Classes of Fires
• Class B
–
–
–
–
Flammable liquids
Fuels
Grease
paints
Classes of Fires
• Class C
– Any fire in the presence of electricity
Classes of Fires
• Class D
– Combustible metal
– Very difficult to extinguish
– Can only use a Class D fire extinguisher
Types of Fire Extinguishers
•
•
•
•
Class A: water with pump or gas pressure
Class B & C: carbon dioxide gas (CO2)
Class A, B, & C: dry chemical
Blanket: smothering fires on humans or
animals
Types of Fire Extinguisher
•
•
•
•
Green triangle: class A, ordinary fires
Red Square: Class B, flammable liquids
Blue Circle: Class C, electrical equipment
Yellow Star: Class D, combustible metals
Location of Fire Extinguishers
• The top of the fire extinguisher should be
between 3’1/2 to 5 ‘ above the ground
Monthly Fire Extinguisher Check
• See that the proper class extinguisher is in
the area of fire class risk
• See that the extinguisher is in its place
• See that there is no obvious mechanical
damage or corrosive condition to prevent
safe reliable operation
Monthly Fire Extinguisher Check
• Examine or read visual indicators to make
certain the extinguisher has not been used or
tampered with
• Check nameplate for readability and lift or
weigh extinguisher to provide reasonable
assurance extinguisher is fully charged
• Examine nozzle for opening for
obstructions
Slow Moving Vehicle (SMV)
• A reflective emblem
• Required on all
vehicles traveling on
public roads with a
maximum speed of
less than 25 miles per
hour