Wood NFI EXAM QUESTIONS WITH COMPLETE
SOLUTIONS
_________ gauge chimney connector is required for connector
pipe < 6" Correct Answers (26)
_________ gauge chimney connector is required for connector
pipe 6" or > Correct Answers (24)
__________________ must be used in as the unexposed
connector in a wall pass through system. Correct Answers
Stainless Steel
3 components of a Catalytic Combustor are Correct Answers •
substrate
• washcoat
• catalyst
4 factors that promote combustion efficiency Correct Answers -
fuel
- temperature
- turbulence
- time
A barometric damper or a barometric draft regulator reduce
excessive draft by....... Correct Answers admitting ambient air
into the venting system.
A long run for a chimney connector is generally defined as
Correct Answers more than 6-8 ft
,A maximum length of ________ to _________ feet is for a
single wall connector is generally accepted. Correct Answers
6,8
A ventilated wall system can only reduce the clearance to
__________, regardless of the calculations. Correct Answers
12"
A wythe or partition should be constructed of at least
____________" (nominal) thick solid masonry. Correct Answers
4
According to ANSI Z21.50 vented gas logs must be equipped
with __________ Correct Answers an automatic gas ignition
shutoff system.
According to NFPA 211, a masonry wall constructed directly
against a combustible wall can reduce appliance clearances by
no more than? Correct Answers 33%
After reduction of listed clearances from appliances, clearances
shall not be less than Correct Answers 12"
All common wood is made up of roughly _______%,
_________% , __________% Correct Answers 50% carbon ,
4% hydrogen , 44% Oxygen
Although offsets of as much as _______degrees from vertical
are allowed with factory built. It is advisable to use
_______degree off sets whenever possible. Correct Answers 30,
15
, An exterior chimney must be constructed Correct Answers
Completely outside the exterior wall.
An exterior chimney requires a minimum ________________
inch clearance to combustible material. Correct Answers 1
An interior chimney requires a minimum ____________ inch
clearance to combustible material Correct Answers 2
At 100% combustion efficiency what byproducts would be
produced Correct Answers - Water vapor
- carbon dioxide
- non combustible ashes
Benifets of increased efficiency of hearth products Correct
Answers • customer satisfaction = $
• reduces fuel consumption
• lower maintenance
• improved viewing of the fire
• improved air quality
BTUs for 1lb of hardwood Correct Answers 8600
BTUs for a pound of softwood Correct Answers 9000
Chimney connector reduced clearances with wall and ceiling
protection:
1/2" thick noncombustible insulation board over 1" glass fiber or
mineral wool batts without ventilated airspace.
Max clearance reduction Wall & Ceiling
SOLUTIONS
_________ gauge chimney connector is required for connector
pipe < 6" Correct Answers (26)
_________ gauge chimney connector is required for connector
pipe 6" or > Correct Answers (24)
__________________ must be used in as the unexposed
connector in a wall pass through system. Correct Answers
Stainless Steel
3 components of a Catalytic Combustor are Correct Answers •
substrate
• washcoat
• catalyst
4 factors that promote combustion efficiency Correct Answers -
fuel
- temperature
- turbulence
- time
A barometric damper or a barometric draft regulator reduce
excessive draft by....... Correct Answers admitting ambient air
into the venting system.
A long run for a chimney connector is generally defined as
Correct Answers more than 6-8 ft
,A maximum length of ________ to _________ feet is for a
single wall connector is generally accepted. Correct Answers
6,8
A ventilated wall system can only reduce the clearance to
__________, regardless of the calculations. Correct Answers
12"
A wythe or partition should be constructed of at least
____________" (nominal) thick solid masonry. Correct Answers
4
According to ANSI Z21.50 vented gas logs must be equipped
with __________ Correct Answers an automatic gas ignition
shutoff system.
According to NFPA 211, a masonry wall constructed directly
against a combustible wall can reduce appliance clearances by
no more than? Correct Answers 33%
After reduction of listed clearances from appliances, clearances
shall not be less than Correct Answers 12"
All common wood is made up of roughly _______%,
_________% , __________% Correct Answers 50% carbon ,
4% hydrogen , 44% Oxygen
Although offsets of as much as _______degrees from vertical
are allowed with factory built. It is advisable to use
_______degree off sets whenever possible. Correct Answers 30,
15
, An exterior chimney must be constructed Correct Answers
Completely outside the exterior wall.
An exterior chimney requires a minimum ________________
inch clearance to combustible material. Correct Answers 1
An interior chimney requires a minimum ____________ inch
clearance to combustible material Correct Answers 2
At 100% combustion efficiency what byproducts would be
produced Correct Answers - Water vapor
- carbon dioxide
- non combustible ashes
Benifets of increased efficiency of hearth products Correct
Answers • customer satisfaction = $
• reduces fuel consumption
• lower maintenance
• improved viewing of the fire
• improved air quality
BTUs for 1lb of hardwood Correct Answers 8600
BTUs for a pound of softwood Correct Answers 9000
Chimney connector reduced clearances with wall and ceiling
protection:
1/2" thick noncombustible insulation board over 1" glass fiber or
mineral wool batts without ventilated airspace.
Max clearance reduction Wall & Ceiling
