fire extinguishers

Question 1

What are the fire classes? give an example oif each

Answer 1

A- Carbonaceous- wood
B- flammable liquids- petrol
c- flammable gases- LPG
d- flammable metals- magnesium
e- fires involving electrical. Not a type of fire but a hazard- switch board
f- fats or oils- deep fryer

Question 2

How does a water extinguisher work? what element of the fire tetrahedron does it remove?

Answer 2

cooling- removing HEAT

Question 3

How does a foam extinguisher work? what element of the fire tetrahedron does it remove?

Answer 3

Smothering, removing OXYGEN and HEAT

Question 4

How does a dry chem extinguisher work? (mono ammonium phosphate) what element of the fire tetrahedron does it remove?

Answer 4

Powder particles scavange /mop up free radical elements important in propagating combustion. It removes the CHEMICAL REACTION component of the fire tetrahedron

Question 5

How does a co2 extinguisher work? ) what element of the fire tetrahedron does it remove?

Answer 5

Smothers , removing OXYGEN

Question 6

How does a vaporizing liquid extinguisher work? ) what element of the fire tetrahedron does it remove?

Answer 6

fire CHEMICAL REACTION