Basic fire theory

Question 1

What makes up the Fire triangle?

Answer 1

Oxygen, heat, fuel.

Question 2

What makes up the Fire tetrahedron?

Answer 2

oxygen, heat, fuel, chemical chain reaction

Question 3

What is a class A fire?

Answer 3

A fire that’s fuel is a common solid material such as wood, rubber, paper, plastic, or grass.

Question 4

What method of extinguishment do you use for a class A fire?

Answer 4

Water, type A and b foam, Extinguishing powerder,

Question 5

What is a class B fire?

Answer 5

A fire that’s fuel is a flammable liquid such as petrol or petroleum.

Question 6

What method of extinguishment do you use for a class B fire?

Answer 6

Class B foam, carbon dioxide, Extinguishing powders and Vaporisng liquids,,

Question 7

What is a class C fire?

Answer 7

A fire that’s fuel is a flammable gas like natural gases or LPG.

Question 8

What method of extinguishment do you use for a class C fire?

Answer 8

Turn off the supply or use a white band fire extinguisher

Question 9

What is a class D fire?

Answer 9

A fire that’s fuel is a combustible metal like magnesium.

Question 10

What method of extinguishment do you use for a class D fire?

Answer 10

It usually requires a special method of extinguishment, depending on the substance. It can be smothered sometimes.

Question 11

What is a class (E) fire?

Answer 11

A fire that is caused by electricity.

Question 12

Why is class (E) different from other classes of fires?

Answer 12

Electricity is heat, not fuel.

Question 13

what method of extinguishment do you use for a class (E) fire?

Answer 13

Carbon dioxide and Vaporisng liquids mainly

Question 14

Which of the following is safe to use on a Class E fire: Extinguishing powders, Foam class b, water.

Answer 14

Extinguishing powders

Question 15

What is a class F fire?

Answer 15

A fire that’s fuel is a oil or fat.

Question 16

What method of extinguishment do you use for a class F fire?

Answer 16

Wet chemicals.

Question 17

Radiation=?

Answer 17

Heat that comes off the fire.

Question 18

Convection=?

Answer 18

air currents created by rising heat.

Question 19

How does Convection work?

Answer 19

Air comes down to replace the rising air, creating an indraft wind; this creates a convection column. This can cause a fire to supply its own oxygen and affect the fire’s behaviour if large enough.

Question 20

Conduction=?

Answer 20

In a fire, conduction refers to the movement of heat through the fire.
The transfer of heat through solid objects i.e. metal.

Question 21

Why is oxygen needed for a fire to burn?

Answer 21

It’s an element of the chain reaction.

Question 22

What are the three Methods of exstugishing

Answer 22

Smothering is cutting off oxygen to a fire. A fire extinguisher, dirt/sand, or foam, hit it.

Cooling: cooling fuel down with water lower than its ignition point—target base of the fire.

Starving: removing fuel. Back burning, removing fuel and creating a control line. Dry firefighting

Question 23

What are the 7 most common firefighting agents?

Answer 23

Water

Foam class a

Foam class b

Carbon dioxide

Extinguishing powders

Vaporisng liquids

Wet chemicals