NFI CORE REVIEW CLASS EXAM QUESTIONS
AND ANSWERS 100% ACCURATE!!
, 4 Stages of combustion - ANSWER 1. 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____________ - ANSWER 8,600 BTUs
Catalytic converters can lower the ignition temperature of wood smoke to approximately
- ANSWER 500 degrees
The proper UL Standard for chimneys used to vent wood stoves is - ANSWER
UL103HT
UL103HT - ANSWER These 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. - ANSWER 50%
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. -
ANSWER 80%
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. - ANSWER 2 and 3
The maximum chimney offset angle permitted in the United States is __________
degrees (from vertical). - ANSWER 30 degrees
According to NFPA 211 and the IRC, a 3.5" brick wall with a 1" ventilated air space
provides a __________ percent clearance reduction - ANSWER 66%
AND ANSWERS 100% ACCURATE!!
, 4 Stages of combustion - ANSWER 1. 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____________ - ANSWER 8,600 BTUs
Catalytic converters can lower the ignition temperature of wood smoke to approximately
- ANSWER 500 degrees
The proper UL Standard for chimneys used to vent wood stoves is - ANSWER
UL103HT
UL103HT - ANSWER These 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. - ANSWER 50%
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. -
ANSWER 80%
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. - ANSWER 2 and 3
The maximum chimney offset angle permitted in the United States is __________
degrees (from vertical). - ANSWER 30 degrees
According to NFPA 211 and the IRC, a 3.5" brick wall with a 1" ventilated air space
provides a __________ percent clearance reduction - ANSWER 66%
