NFPA 211 Exam Questions
Correct Verified Solutions New
Update (A Pass)
3 stages of wood combustion - Answer- Drying, pyrolysis, charcoal
Combustion - Answer- Rapid oxidation of a substance, accompanied by the production
of heat and light.
Creosote - Answer- by-product of burning wood. Combustable deposit that originates as
condensed wood smoke, tar, vapors and other organic compounds.
Soot - Answer- soft black and brown
Glazed Creosote - Answer- combustible and hard to remove
Pyrolysis changes to creosote - Answer- changes the the tar-like appearance to shiny
curly flakes or bubbly deposits
3 Factors that affect creosote build-up - Answer- Smoke density, flue gas
temp,residence time
smoke density - Answer- amount of unburned hydrocarbon in the flue gas
Flue gas temperature - Answer- The temp of flue gases moving through the flue
Residence time - Answer- the amount of time smoke remains in venting system
large fuel loads can affect creosote buildup - Answer-
what is a good moisture content of wood? - Answer- 15-25%
catalytic combustors - Answer- the smoky exhaust is passed through a coated ceramic
honeycomb inside the stove where the smoke gases and particles ignite and burn.
definition of chimney fire - Answer- burning of soot and creosote accumulations inside a
connector or chimney
indications of chimney fires - Answer- 1. loud roaring noise
2. sparks and flames coming from the chimney
3.red hot connector pipe
4. vibrating connector and/or stove
Correct Verified Solutions New
Update (A Pass)
3 stages of wood combustion - Answer- Drying, pyrolysis, charcoal
Combustion - Answer- Rapid oxidation of a substance, accompanied by the production
of heat and light.
Creosote - Answer- by-product of burning wood. Combustable deposit that originates as
condensed wood smoke, tar, vapors and other organic compounds.
Soot - Answer- soft black and brown
Glazed Creosote - Answer- combustible and hard to remove
Pyrolysis changes to creosote - Answer- changes the the tar-like appearance to shiny
curly flakes or bubbly deposits
3 Factors that affect creosote build-up - Answer- Smoke density, flue gas
temp,residence time
smoke density - Answer- amount of unburned hydrocarbon in the flue gas
Flue gas temperature - Answer- The temp of flue gases moving through the flue
Residence time - Answer- the amount of time smoke remains in venting system
large fuel loads can affect creosote buildup - Answer-
what is a good moisture content of wood? - Answer- 15-25%
catalytic combustors - Answer- the smoky exhaust is passed through a coated ceramic
honeycomb inside the stove where the smoke gases and particles ignite and burn.
definition of chimney fire - Answer- burning of soot and creosote accumulations inside a
connector or chimney
indications of chimney fires - Answer- 1. loud roaring noise
2. sparks and flames coming from the chimney
3.red hot connector pipe
4. vibrating connector and/or stove
