NFI CORE REVIEW CLASS QUESTIONS WITH 100%
CORRECT ANSWERS.
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%
According to NFPA 211 and the IRC, a 3.5" brick wall without ventilated air
space provides a __________ percent clearance reduction. Answer - 33%
According to NFPA 211 and the IRC, a 24 gauge sheet metal panel with a 1"
ventilated air space provides a __________ percent clearance reduction when
used as a ceiling protector. Answer - 50%
The standard clearance to combustibles for an unlisted woodstove is
___________ inches. Answer - 36"
What is UL 1618?
2 types of manufactured pads Answer - Floor protection
CORRECT ANSWERS.
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%
According to NFPA 211 and the IRC, a 3.5" brick wall without ventilated air
space provides a __________ percent clearance reduction. Answer - 33%
According to NFPA 211 and the IRC, a 24 gauge sheet metal panel with a 1"
ventilated air space provides a __________ percent clearance reduction when
used as a ceiling protector. Answer - 50%
The standard clearance to combustibles for an unlisted woodstove is
___________ inches. Answer - 36"
What is UL 1618?
2 types of manufactured pads Answer - Floor protection
