7. ARLY MAN DIDN’T KNOW WHAT FIRE WAS ,
BUT HE MUST HAVE SEEN THE DAMAGE IT
COULD CAUSED BY IT.HE MUST HAVE SEEN
LIGHTNING AND VOLCANOS BEFORE HE BEGAN
TO USE FIRE HIMSELF.
LIGHTNING VOLCANO
Jude Joseph
8. WE USE IT TO COOK OUR FOOD
WARM OUR HOMES IN WINTER
Jude Joseph
13. Every fuel has a particular temperature which it begins to burn .This temperature is
called the FLASH POINT or KINDLING TEMPERATURE of fuel.
THIS MEANS THAT FIRE IS VERY USEFUL
AS LONG AS IT IS KEPT UNDER CONTROL
GOOD SERVANT BUT A BAD MASTER
Jude Joseph
15. FIRE EXTINGUISHERS
An active fire protection
device used to extinguish
or control small fires,
often in emergency
situations.
consists of a hand-held
cylindrical pressure
vessel containing an
agent which can be
discharged to extinguish
a fire. Jude Joseph
17. Class A – caused by ordinary
combustible materials such as
paper, wood, cardboard,
and most plastics.
Class B - involve flammable
or combustible liquids such as
gasoline, kerosene, grease and
oil.
Jude Joseph
18. Class C - involve electrical
equipment, such as
appliances, wiring, circuit
breakers and outlets.
Class D - involve combustible
metals, such as magnesium,
titanium, potassium and
sodium.
Jude Joseph
19. TYPES OF FIRE EXTINGUISHERS
AIR-PRESSURIZED WATER
EXTINGUISHER
DRY CHEMICAL EXTINGUISHER
FOAM EXTINGUISHER
CARBON DIOXIDE (CO2)
EXTINGUISHER
Jude Joseph
21. AIR-PRESSURIZED WATER
EXTINGUISHERS
are suitable for class A
fires only.
are filled with water and
pressurized with oxygen.
cool burning material
by absorbing heat from
burning material.
inexpensive, harmless,
and relatively easy to
clean up
Jude Joseph
22. DRY CHEMICAL EXTINGUISHERS
it prevents the chemical reaction between
heat, fuel and oxygen
halts the production of fire sustaining "free-
radicals", thus extinguishing the fire.
are suitable for a combination of class A, B
and C fires.
are filled with foam or powder and
pressurized with nitrogen. Jude Joseph
23. FOAM EXTINGUISHERS
Applied to fuel fires to form a frothy
blanket or seal over the fuel, preventing
oxygen reaching it.
Jude Joseph
24. CARBON DIOXIDE (CO2)
EXTINGUISHERS
are used for class B and C fires.
contain carbon dioxide, a non-
flammable gas, and are highly
pressurized.
they don't leave a harmful residue - a
good choice for an electrical fire.
it is one on the best agents to use on a
person who is on fire. Jude Joseph
28. Long ago, there were no firemen. When fire
broke out, everybody became a firefighter.
People formed human chains (they still do if
required) and passed buckets of water from a
well or a pond to the blaze.
Jude Joseph
29. Now there are laws about building construction which ensure that space is left
between buildings to reduce the fire risk.
Every new building, especially a public place, must ensure observance of fire
prevention norms. Bands of firefighting workers with special equipment, known as fire
brigades, are there to put out fires. Firefighters are highly trained people. They
possess many skills. They cut off electricity supply, knock down dangerous walls,
spray water and other materials to bring fire under control. They are also trained in first
aid so that they can help people suffering from burns or from the effects of smoke.
first aid
Jude Joseph
30. Fire is still worshipped in many
parts of the world.
Jude Joseph
