Fire is a Chemical
Reaction Between Fuel and Oxygen(air)at a certain temperature and produced
flame,heat,Light, Co2 etc.
Fire triangle –
To combine 3 element
made fire
1>Fuel
2>Heat
3>Oxygen(air)
 |
| (FIRE TRIANGLE) |
Combustion process-
The process of required supply of
fuel and oxygen at a flame zone before ignition Temperature will react by a
high speed collision of their molecules to start bombarding chain reaction
between each molecule and production of fire is known as combustion.
Three type
of combustion- 1)Slow Combustion
2)Rapid Combustion
3)Spontaneous Combustion
Classification of
Fire-
Class-A-
This class of fire consist combustion
of solid material like wood,paper,textile etc.
Class-B-
This type of fire consist flammable
liquids solvents,paints,petroleum product etc.
Class-C-
This type of fire consist of gaseous substance
like LPG,Acetylene,ethane,propen etc.
Class-D-
This type of fire consist reactive chemical and combustible metals etc.
Class-E-
Fire due to electrical origin.
Development
of fire
When fire is burn radiant heat and
flame is produced.so heat and flame will move upward and radiantion heat is
move sides and downward.
Type of fire extinguisher
Class
A - Wter type,foam type,DCP type,Wet chemical type
fire
extinguisher used.
Class B – Foam,DCP type,C02 type fire extinguisher used .
Class C – Only DCP type (Dry Chemical Powder) fire extinguisher
used.
Class D – DCP type fire extinguisher used
Class E – Electrical equipment DCP type,Co2 Type fire
extinguisher used.
Class F – Wet chemical type fire extinguisher used.
N.B- When
fire extinguisher used on a fire Always remember this mothed ‘PASS’
P- Pull the pin on the fire extinguisher in order to break the seal.A- Aim the nozzle or hose at the base of fire from the recommended safe distance.S- Squeeze the operating lever or discharge the fire extinguisher .S- Sweep the nozzle from side to side while pointed at thr base of the fire until it extinguished.
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