NFPA 211 Questions and Graded Answers.
3 stages of wood combustion - Drying, pyrolysis, charcoal
Combustion - Rapid oxidation of a substance, accompanied by the production of heat and
light.
Creosote - by-product of burning wood. Combustable deposit that originates as condensed
wood smoke, tar, vapors and other organic compounds.
Soot - soft black and brown
Glazed Creosote - combustible and hard to remove
Pyrolysis changes to creosote - changes the the tar-like appearance to shiny curly flakes or
bubbly deposits
3 Factors that affect creosote build-up - Smoke density, flue gas temp,residence time
smoke density - amount of unburned hydrocarbon in the flue gas
Flue gas temperature - The temp of flue gases moving through the flue
Residence time - the amount of time smoke remains in venting system
large fuel loads can affect creosote buildup -
3 stages of wood combustion - Drying, pyrolysis, charcoal
Combustion - Rapid oxidation of a substance, accompanied by the production of heat and
light.
Creosote - by-product of burning wood. Combustable deposit that originates as condensed
wood smoke, tar, vapors and other organic compounds.
Soot - soft black and brown
Glazed Creosote - combustible and hard to remove
Pyrolysis changes to creosote - changes the the tar-like appearance to shiny curly flakes or
bubbly deposits
3 Factors that affect creosote build-up - Smoke density, flue gas temp,residence time
smoke density - amount of unburned hydrocarbon in the flue gas
Flue gas temperature - The temp of flue gases moving through the flue
Residence time - the amount of time smoke remains in venting system
large fuel loads can affect creosote buildup -
