NFI Core Review Class exam with
complete solutions
4 Stages of combustion - ANS1. Moisture evaporation
2. Release of combustible gases
3. Ignition of combustible gas
4. Char burning
The total energy produced by burning one pound of wood is
approximately____________ - ANS8,600 BTUs
Catalytic converters can lower the ignition temperature of wood smoke to approximately
- ANS500 degrees
The proper UL Standard for chimneys used to vent wood stoves is - ANSUL103HT
UL103HT - ANSThese requirements cover factory-built chimneys intended for venting
gas, liquid, and solid-fuel fired residential-type appliances and building heating
appliances
According to NFPA 211, the maximum horizontal run of a wood stove connector is
limited to ______________ percent of the vertical portion of the chimney above the
connector. - ANS50%
According to NFPA 211, a manual damper installed in a wood stove connector pipe
cannot block more than ___________ percent of the connector when fully closed. -
ANS80%
According to NFPA 211, the maximum permitted chimney flue area is ______ times the
appliance flue collar area for exterior chimneys and ____ times the appliance flue collar
area for interior chimneys. - ANS2 and 3
The maximum chimney offset angle permitted in the United States is __________
degrees (from vertical). - ANS30 degrees
According to NFPA 211 and the IRC, a 3.5" brick wall with a 1" ventilated air space
provides a __________ percent clearance reduction - ANS66%
According to NFPA 211 and the IRC, a 3.5" brick wall without ventilated air space
provides a __________ percent clearance reduction. - ANS33%
complete solutions
4 Stages of combustion - ANS1. Moisture evaporation
2. Release of combustible gases
3. Ignition of combustible gas
4. Char burning
The total energy produced by burning one pound of wood is
approximately____________ - ANS8,600 BTUs
Catalytic converters can lower the ignition temperature of wood smoke to approximately
- ANS500 degrees
The proper UL Standard for chimneys used to vent wood stoves is - ANSUL103HT
UL103HT - ANSThese requirements cover factory-built chimneys intended for venting
gas, liquid, and solid-fuel fired residential-type appliances and building heating
appliances
According to NFPA 211, the maximum horizontal run of a wood stove connector is
limited to ______________ percent of the vertical portion of the chimney above the
connector. - ANS50%
According to NFPA 211, a manual damper installed in a wood stove connector pipe
cannot block more than ___________ percent of the connector when fully closed. -
ANS80%
According to NFPA 211, the maximum permitted chimney flue area is ______ times the
appliance flue collar area for exterior chimneys and ____ times the appliance flue collar
area for interior chimneys. - ANS2 and 3
The maximum chimney offset angle permitted in the United States is __________
degrees (from vertical). - ANS30 degrees
According to NFPA 211 and the IRC, a 3.5" brick wall with a 1" ventilated air space
provides a __________ percent clearance reduction - ANS66%
According to NFPA 211 and the IRC, a 3.5" brick wall without ventilated air space
provides a __________ percent clearance reduction. - ANS33%
