Chapter 4 Flashcards
Facts are also based on the following (4)
Pre incident survey of the site
Knowledge of building construction and occupancy
The current time of day and day of the week and on-scene observations including a 360 degree survey
Knowledge of basic fire development
Highly recommended number of crew for RIC/RIT
more then two and include and officer
Tar Soot and carbon are the most common heated particles found in smoke giving it a color of
Black
Water moisture and heated gases give the smoke a color of
White
Small amount of smoke coming from a large Structure may indicate
A well Seated fire inside
Light colored smoke or slow moving smoke may indicate
the smoke has traveled distances
light white smoke indicates
that pyrolysis is occurring in areas adjacent to the main body of fire
Brown smoke
is common in mid stage heating as moisture mixes with gases and carbon as pyrolysis increases it is also common in mid to late stage heating to see the caramel color brown smoke also indication of burning wood
Gray smoke
Indicates a combination of mixing, it can be mid stage heating with white brown or black or it can be when different smoke areas combing it can indicate smoke production changes from mid stage heating to high heat
Black Smoke
Contains high quantities of carbon particles and is also an indicator of the amount of ventilation available at the seat of the fire
Thick Black Smoke
Suggests the fire is in the late stages of pyrolysis which produces large amounts of carbon as unburned product
Black Fire
Dense Black smoke that is ready to ignite possibly at the vent point
Unusual colors in smoke
give an indication that different extinguishing agents may be needed las flammable metals and chemicals will give off unusual colors in smoke
Hight Neutral plane
May indicate that a fire is in the early staged of development
Low Neutral plane
may indicate that the compartment is reaching flashover conditions or that the fire is a grade below the room being observed
