NFI Core Review Class questions and answers graded A+ updated

NFI Core Review Class questions and answers
graded A+ updated
1. 4 Stages of combustion 1. Moisture evaporation
2. Release of combustible gases
3. Ignition of combustible gas
4. Char burning

2. The total energy produced by
burning one pound of wood is 8,600 BTUs
ap- proximately

3. Catalytic converters can lower
the ignition temperature of
wood smoke to approximately 500 degrees

4. The proper UL Standard for chim- UL103HT
neys used to vent wood stoves is

5. UL103HT These requirements cover factory-built chimneys
intended for venting gas, liquid, and solid-fuel fired
residential-type appliances and building heating
appliances

6. According to NFPA 211, the
max- imum horizontal run of a 50%
wood stove connector is
limited to
percent of the
verti- cal portion of the
chimney above the connector.

7. According to NFPA 211, a
man- ual damper installed in
a wood stove connector pipe 80%
cannot block more than per-
cent of the connector when
fully closed.



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, NFI Core Review Class questions and answers
graded A+ updated
8. According to NFPA 211, the
max- imum permitted chimney 2 and 3
flue area is times the
appliance flue collar area for
exterior chim- neys and
times the
appliance flue collar area for
interior chim- neys.

9. The maximum chimney offset an- 30 degrees
gle permitted in the United
States is degrees (from
verti- cal).
10. According to NFPA 211 and
the IRC, a 3.5" brick wall 66%
with a 1" ventilated air
space provides a
percent clearance
re- duction

11. According to NFPA 211 and
the IRC, a 3.5" brick wall 33%
without ventilated air space
provides a
percent clearance
re- duction.

12. According to NFPA 211 and the
IRC, a 24 gauge sheet metal
panel with a 1" ventilated air 50%
space pro- vides a percent
clear- ance reduction when
used as a ceiling protector.




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