Foam

Question 1

What are the seven properties of firefighting foam

Answer 1

Expansion - amount of foam made
Stability - ability to remain intact
Fluidity - onto and flow across other liquids
Contamination resistence
Sealing and Resealing
Knockdown and extinction
Burnback resistence

Question 2

What is foam made from

Answer 2

Water
Air
Foam concentrate

Question 3

How does foam work?

Answer 3

Excludes oxygen
separates flames from fuel
restricts the release of gases
cooling
heat barrier

Question 4

What are the hazards with foam

Answer 4

Slip hazard
Disorientation
Claustrophobic effect
Sound dampening - distress signals
TICs don't work
Makes fires hard to locate
Make risks hard to locate
Reaction with class D fires
Environmental hazard