fire safety principles Flashcards
Ordinary combustible materials such as wood,
cloth, paper, rubber and plastics, etc.
Class A
Flammable or combustible
liquids, flammable gases.
Class B
Energized electrical
equipment
Class C
Combustible metals such
as potassium, sodium,
magnesium and other
reactive metals
Class D
Use Water
Class A
Exclude air from burning materials
Class B
No Water; Use electrically non-conductive
extinguishing agents such as gaseous systems
Class C
Heat-absorbing medium which is not reactive with
burning metals
Class D
Stages of fire growth
- ) Pre-flashover or growth phase
- ) Flashover
- ) Fully developed fire (Stable phase)
- )Decay (Cooling Period)
Involves flaming combustion of an item and may lead to a spread of fire; or a smoldering, poorly- ventilated fire with substantial smoke.
Pre-flashover or growth phase
Rapid change from a local fire to one involving all combustible materials in a room.
Flashover
All materials in compartment are alight; maximum rate of heat release is dependent on either available ventilation or quantity of fuel.
Fully developed fire (Stable phase)
Gradual consumption of fuel in the compartment.
Decay (Cooling Period)
Resistance to heat and flames of fire rated constructions for fire protection
Passive Fire Protection
detection, suppression, and activation for fire protection
Active Fire Protection