NFI Exam Review Questions With Complete Solutions
________ ignites at a lower concentration Correct Answers
propane
1 bushel (56lbs) of premium heating corn equals Correct
Answers 7600 BTU/lb of energy
10 foot/2 foot/3 foot rule Correct Answers at least 3 feet higher
than the roof opening
at least 2 feet higher than any other portion of any structure
within 10 feet of the chimney, horizontally
2 types of factory built fireplaces Correct Answers radiating and
circulating
3 Ts of efficiency Correct Answers Temperature, turbulence,
time
ability of the vent to hold heat (draft) Correct Answers gases
cool, become less buoyant, lose heat to chimney walls, double
walls, or insulated has vents.
Air Inlets (pellet) Correct Answers may terminate at applice and
bring room air (may extend to outside air source, and may mix
room and outside air)
delivers primary air to burn pot
delivers secondary air to burn gases
,air to fuel ratio is a Correct Answers critical factor in obtaining
optimum fuel combustion
Aldehydes Correct Answers chemical compounds that have a
strong pungent odor
Aldehydes result from Correct Answers flame impingement and
through the presence of contaminated air
All vented gas fireplaces MUST have Correct Answers an
automatic gas ignition system with safety shutoff
ANSI Correct Answers American National Standards Institute
ANSI Z21.11.2a Correct Answers appliances -fireplaces,
fireplace inserts, freestanding stoves
required - safety pilot with ODS
restrictions - bedroom, bathroom, confined spaces, tight
construction, max 40,000 BTU/hr output, authority having
jurisdiction
options - listed blowers, thermostats
ANSI Z21.60, CSA 2.26 Correct Answers appliances - log sets
restrictions - no thermostat
options - listed blowers
requirements - safety pilot, working fireplace chimney,
permanent damper opening, fireplace screen, cleaning of venting
system
Ash recepticals Correct Answers some sealed (limits air
leakage)
,some allow controlled amount of air
ash removal CRITICAL
- blocks air inlets
- accumulation on blower, heat exchanges, and venting systems
Ash traps Correct Answers spaces to catch fly ash
access through panels
regular cleaning is important
- reduce build up on heat exchangers and vents
ASTM Correct Answers American Society for Testing and
Materials
Auger system (pellet) Correct Answers fuel feed control
mechanism (precise speed and intervals, adjusted to size and
density of pellets, and helps combustion air adjustments)
backup emergency heating Correct Answers for power outages,
either a limited area or ability to produce primary heat
Bottom feed prevention methods include: Correct Answers high
temperature limit switch or thermistor on auger tube (isolation
of auger tube)
BTU Correct Answers British Thermal Unit, The amount of
energy needed to heat one pound of water one degree Fahrenheit
, Built-in, high efficiency fireplaces Correct Answers contain
efficient combustion and convection champers that are enclosed
in an insulated metal cabinet. Can be enclosed in close
proximity to combustibles
butane lighter temp Correct Answers 3,200 F
Carbon monoxide is ________ when aldehydes are present
Correct Answers present
Carbon monoxide is dangerous because (other than senseless)
Correct Answers it mixes with blood and reduces oxygen
carrying capacity
Cast Iron (fireplace) Correct Answers made from molds, can be
decorative
Catalyst Correct Answers substance that modifies, especially
increases, the rate of chemical reaction with out being consumed
in the process
Catalyst Equipped Appliance overcomes Correct Answers the
difficulty of maintaining high gas ignition temperature
Catalyst Equipped Appliances Correct Answers catalytic
combustors substantially reduce emissions and creosote
formation and have a higher efficiency rating
Catalyst Equipped Appliances usually consists of Correct
Answers ceramic or stainless steel substrate covered with a high
________ ignites at a lower concentration Correct Answers
propane
1 bushel (56lbs) of premium heating corn equals Correct
Answers 7600 BTU/lb of energy
10 foot/2 foot/3 foot rule Correct Answers at least 3 feet higher
than the roof opening
at least 2 feet higher than any other portion of any structure
within 10 feet of the chimney, horizontally
2 types of factory built fireplaces Correct Answers radiating and
circulating
3 Ts of efficiency Correct Answers Temperature, turbulence,
time
ability of the vent to hold heat (draft) Correct Answers gases
cool, become less buoyant, lose heat to chimney walls, double
walls, or insulated has vents.
Air Inlets (pellet) Correct Answers may terminate at applice and
bring room air (may extend to outside air source, and may mix
room and outside air)
delivers primary air to burn pot
delivers secondary air to burn gases
,air to fuel ratio is a Correct Answers critical factor in obtaining
optimum fuel combustion
Aldehydes Correct Answers chemical compounds that have a
strong pungent odor
Aldehydes result from Correct Answers flame impingement and
through the presence of contaminated air
All vented gas fireplaces MUST have Correct Answers an
automatic gas ignition system with safety shutoff
ANSI Correct Answers American National Standards Institute
ANSI Z21.11.2a Correct Answers appliances -fireplaces,
fireplace inserts, freestanding stoves
required - safety pilot with ODS
restrictions - bedroom, bathroom, confined spaces, tight
construction, max 40,000 BTU/hr output, authority having
jurisdiction
options - listed blowers, thermostats
ANSI Z21.60, CSA 2.26 Correct Answers appliances - log sets
restrictions - no thermostat
options - listed blowers
requirements - safety pilot, working fireplace chimney,
permanent damper opening, fireplace screen, cleaning of venting
system
Ash recepticals Correct Answers some sealed (limits air
leakage)
,some allow controlled amount of air
ash removal CRITICAL
- blocks air inlets
- accumulation on blower, heat exchanges, and venting systems
Ash traps Correct Answers spaces to catch fly ash
access through panels
regular cleaning is important
- reduce build up on heat exchangers and vents
ASTM Correct Answers American Society for Testing and
Materials
Auger system (pellet) Correct Answers fuel feed control
mechanism (precise speed and intervals, adjusted to size and
density of pellets, and helps combustion air adjustments)
backup emergency heating Correct Answers for power outages,
either a limited area or ability to produce primary heat
Bottom feed prevention methods include: Correct Answers high
temperature limit switch or thermistor on auger tube (isolation
of auger tube)
BTU Correct Answers British Thermal Unit, The amount of
energy needed to heat one pound of water one degree Fahrenheit
, Built-in, high efficiency fireplaces Correct Answers contain
efficient combustion and convection champers that are enclosed
in an insulated metal cabinet. Can be enclosed in close
proximity to combustibles
butane lighter temp Correct Answers 3,200 F
Carbon monoxide is ________ when aldehydes are present
Correct Answers present
Carbon monoxide is dangerous because (other than senseless)
Correct Answers it mixes with blood and reduces oxygen
carrying capacity
Cast Iron (fireplace) Correct Answers made from molds, can be
decorative
Catalyst Correct Answers substance that modifies, especially
increases, the rate of chemical reaction with out being consumed
in the process
Catalyst Equipped Appliance overcomes Correct Answers the
difficulty of maintaining high gas ignition temperature
Catalyst Equipped Appliances Correct Answers catalytic
combustors substantially reduce emissions and creosote
formation and have a higher efficiency rating
Catalyst Equipped Appliances usually consists of Correct
Answers ceramic or stainless steel substrate covered with a high
