Fire Triangle
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  • Introduction
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For combustion to take place there are three things required:

1. Fuel - the substance that burns.

2. Oxygen - when a fuel is burned it is reacting with the oxygen in the air.

3. Heat - this keeps the fire burning.

 

This can be represented in a diagram known as the Fire Triangle:

 

The three essential ingredients for a fire are shown in the fire triangle. If any one of these ingredients is removed the fire will go out.

 

Fire fighters will remove one side of the triangle to extinguish a fire. There are several ways to extinguish a fire.

 

 

Sand - When sand is added to a fire it removes the oxygen.

Fire Blankets - Fire blankets can be wrapped around burning objects or people. The blanket stops oxygen getting to the flame.

Carbon dioxide (CO2) - Carbon dioxide fire extinguishers are sprayed onto the fire to remove the oxygen.

Water - Water can be added to fires to remove the heat. Water must never be used on an electrical fire or any burning oil. Adding water to burning oil will cause the cause the fire to become fiercer. Shown below is a picture of what happens when water is added to burning oil in a chip pan:

 

 

If you ever experience a chip pan fire in your home place a damp towel over the pan, call 999 and leave the house.

  • Question 1
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Which if the following is the correct hazard symbol for a flammable substance?

 

A B C


A

B

C

  • Question 2
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Tick the substances below that are required for combustion to take place.

Heat

Water

Petrol

Fuel

Oxygen

Carbon dioxide

  • Question 3
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Which of the following substances can be used to extinguish a fire?

Petrol

Wood

Carbon dioxide

Oxygen

Water

Sand

  • Question 4
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Which of the following should never be added to an electrical fire?

Water

Sand

Carbon dioxide

Fire blanket

  • Question 5
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Tim is filling his petrol mower and accidentally spills some of the petrol. Which of the following should be added to to the spillage to prevent fire?

Sand

Carbon dioxide

Fire blanket

  • Question 6
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Someone has left the chip pan on and it has just begun to burn.

Listed below is a list of things that you should do to help . Put the list into the correct order.

 1st 2nd 3rd NEVER
Call 999
Place a damp towel over the pan
Pour water onto the burning oil
Leave the house
  • Question 7
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Which of the following should be found in every home (as recommended by the fire service), to protect you and your home from fire? Tick all the answers that you think are necessary.

Smoke alarm

Fire blanket

Sprinkler system

Carbon dioxide fire extinguisher

Progress