Comprehensive IAAI CFI Exam
champion Study Questions and answers
2026/2027
Ignition by Electrical Energy - CORRECT ANS ***Ignition that involves transferring sufficient heat to a
fuel by passage of electrical current to ignite material that is closeby.
Ignition by hot surface - CORRECT ANS ***One of the processes that vehicle motor oil is prone to.
Ignition by open flame - CORRECT ANS ***One of the processes that vehicle motor oil is prone to.
Trained Personnel - CORRECT ANS ***An investigator should notify this person(s) upon finding an
incendiary device that has not activated.
Transformer - CORRECT ANS ***A mechanism used to reduce voltages from the normal 120 V and to
isolate the rest of an appliance from the supply circuit.
Transmission - CORRECT ANS ***The type of pipeline used to convey natural gas from the storage or
production facilities to local utilities.
Transmission line - CORRECT ANS ***The pipeline type carrying natural gas from production sites to
local utilities.
Turbocharger - CORRECT ANS ***The hottest point of an engine, which uses exhaust gases for
propulsion.
Two modes of convection heat transfer - CORRECT ANS ***Forced and natural.
Type 1 Construction - CORRECT ANS ***The noncombustible construction type, made of steel and
concrete with fire resistance.
,Type 2 Construction - CORRECT ANS ***The noncombustible construction type, made of steel and
concrete; but with little to no fire resistance.
Type 3 Construction - CORRECT ANS ***The Ordinary construction type, with masonry or
noncombustible exterior walls.
Type 4 Construction - CORRECT ANS ***Heavy timber or mill construction type.
Type 5 Construction - CORRECT ANS ***Wood framed construction type.
Types of interviews - CORRECT ANS ***The three types of interviews are trust, caution, and distrust.
Typical Pressure in High-Pressure Fuel-Injected Vehicles - CORRECT ANS ***35-70 p.s.i.
U.S. Coast Guard - CORRECT ANS ***The entity, where an investigator can obtain recall information
regarding fire causes in boats and the manufacturer, model, and year.
Up Position - CORRECT ANS ***An outside screw and yoke valve is open when the stem is in the up
position.
Upper Explosive Limit - CORRECT ANS ***Which will create more damage in an explosion: the Upper or
Lower Explosive Limit?
Utilities - CORRECT ANS ***An immediate concern to the fire investigator is the status of the structure's
utilities.
Vaporizing water in insulation - CORRECT ANS ***Refers to the process of water turning into vapor
within insulation materials.
Ventilation Conditions - CORRECT ANS ***This is a key consideration of the fire's characteristics, when
conducting a fire test or fire model, in order to validate the test.
,Ventilation Opening - CORRECT ANS ***This firefighting tactic made directly above the fire will help
localize the fire.
Ventilation path - CORRECT ANS ***One of the characteristics indicated by the angle of the borders of a
'V' pattern.
Ventilation-Controlled Fire - CORRECT ANS ***Fire in which the heat release rate or growth is controlled
by the amount of air available to the fire.
Violent Explosions - CORRECT ANS ***Fuel-air mixtures at or near the lower explosive limit (LEL) do NOT
always produce less than those fuel-air mixtures at or near the upper explosive limit (UEL).
Voltage at Service Entrance Cables - CORRECT ANS ***240 volts between the two hot wires in most
single-family residences in the United States
Voltage between two hot wires in a home service - CORRECT ANS ***Standard residential service in
many places provides 240 V across two hots.
Water loss in drywall - CORRECT ANS ***Described by the term calcination.
Wattage of a hair dryer - CORRECT ANS ***P=I×V=8.3×120≈1000 W.
Watts - CORRECT ANS ***Watts = amps x volts
Weatherhead - CORRECT ANS ***A specific device on a structure that is associated with electricity and is
part of the electrical system.
Wet-Pipe System - CORRECT ANS ***The most reliable type of sprinkler system.
Wildfire investigations - CORRECT ANS ***In wildfire investigations, evidence collection and
documentation are equally important as in structural fires.
, Wildfires - CORRECT ANS ***Weather history is an important factor when investigating these types of
fires.
Wood Trusses - CORRECT ANS ***The failure of one of these types of construction features can affect
adjacent members of a similar type.
X-rays - CORRECT ANS ***These medical procedures should be done of the entire deceased body,
including the clothing and associated debris found near the body.
Year of NFPA 1033 First Edition - CORRECT ANS ***1987
Ignition from a pilot flame - CORRECT ANS ***One of the processes that vehicle motor oil is prone to.
Ignition source identification - CORRECT ANS ***Collapsed springs show intense heat exposure but don't
pinpoint what ignited the furniture.
Ignition Temperature - CORRECT ANS ***The minimum temperature needed to heat a fuel so as to
ignite and begin self-sustained combustion.
Ignition Temperature of Power Steering Fluid - CORRECT ANS ***680°F
Immediate post-mortem analysis - CORRECT ANS ***Critical for assessing levels of carbon monoxide in a
victim after removal from fire.
Incandescent Light Bulbs - CORRECT ANS ***An item that tends to 'pull' toward the heat source (*if over
25 watts).
Incandescent light bulbs over 25 watts - CORRECT ANS ***Often pull (sag) toward the heat source.
Incendiary device protocol - CORRECT ANS ***An investigator should notify trained personnel (e.g.,
bomb squad) upon finding an unactivated incendiary device.
champion Study Questions and answers
2026/2027
Ignition by Electrical Energy - CORRECT ANS ***Ignition that involves transferring sufficient heat to a
fuel by passage of electrical current to ignite material that is closeby.
Ignition by hot surface - CORRECT ANS ***One of the processes that vehicle motor oil is prone to.
Ignition by open flame - CORRECT ANS ***One of the processes that vehicle motor oil is prone to.
Trained Personnel - CORRECT ANS ***An investigator should notify this person(s) upon finding an
incendiary device that has not activated.
Transformer - CORRECT ANS ***A mechanism used to reduce voltages from the normal 120 V and to
isolate the rest of an appliance from the supply circuit.
Transmission - CORRECT ANS ***The type of pipeline used to convey natural gas from the storage or
production facilities to local utilities.
Transmission line - CORRECT ANS ***The pipeline type carrying natural gas from production sites to
local utilities.
Turbocharger - CORRECT ANS ***The hottest point of an engine, which uses exhaust gases for
propulsion.
Two modes of convection heat transfer - CORRECT ANS ***Forced and natural.
Type 1 Construction - CORRECT ANS ***The noncombustible construction type, made of steel and
concrete with fire resistance.
,Type 2 Construction - CORRECT ANS ***The noncombustible construction type, made of steel and
concrete; but with little to no fire resistance.
Type 3 Construction - CORRECT ANS ***The Ordinary construction type, with masonry or
noncombustible exterior walls.
Type 4 Construction - CORRECT ANS ***Heavy timber or mill construction type.
Type 5 Construction - CORRECT ANS ***Wood framed construction type.
Types of interviews - CORRECT ANS ***The three types of interviews are trust, caution, and distrust.
Typical Pressure in High-Pressure Fuel-Injected Vehicles - CORRECT ANS ***35-70 p.s.i.
U.S. Coast Guard - CORRECT ANS ***The entity, where an investigator can obtain recall information
regarding fire causes in boats and the manufacturer, model, and year.
Up Position - CORRECT ANS ***An outside screw and yoke valve is open when the stem is in the up
position.
Upper Explosive Limit - CORRECT ANS ***Which will create more damage in an explosion: the Upper or
Lower Explosive Limit?
Utilities - CORRECT ANS ***An immediate concern to the fire investigator is the status of the structure's
utilities.
Vaporizing water in insulation - CORRECT ANS ***Refers to the process of water turning into vapor
within insulation materials.
Ventilation Conditions - CORRECT ANS ***This is a key consideration of the fire's characteristics, when
conducting a fire test or fire model, in order to validate the test.
,Ventilation Opening - CORRECT ANS ***This firefighting tactic made directly above the fire will help
localize the fire.
Ventilation path - CORRECT ANS ***One of the characteristics indicated by the angle of the borders of a
'V' pattern.
Ventilation-Controlled Fire - CORRECT ANS ***Fire in which the heat release rate or growth is controlled
by the amount of air available to the fire.
Violent Explosions - CORRECT ANS ***Fuel-air mixtures at or near the lower explosive limit (LEL) do NOT
always produce less than those fuel-air mixtures at or near the upper explosive limit (UEL).
Voltage at Service Entrance Cables - CORRECT ANS ***240 volts between the two hot wires in most
single-family residences in the United States
Voltage between two hot wires in a home service - CORRECT ANS ***Standard residential service in
many places provides 240 V across two hots.
Water loss in drywall - CORRECT ANS ***Described by the term calcination.
Wattage of a hair dryer - CORRECT ANS ***P=I×V=8.3×120≈1000 W.
Watts - CORRECT ANS ***Watts = amps x volts
Weatherhead - CORRECT ANS ***A specific device on a structure that is associated with electricity and is
part of the electrical system.
Wet-Pipe System - CORRECT ANS ***The most reliable type of sprinkler system.
Wildfire investigations - CORRECT ANS ***In wildfire investigations, evidence collection and
documentation are equally important as in structural fires.
, Wildfires - CORRECT ANS ***Weather history is an important factor when investigating these types of
fires.
Wood Trusses - CORRECT ANS ***The failure of one of these types of construction features can affect
adjacent members of a similar type.
X-rays - CORRECT ANS ***These medical procedures should be done of the entire deceased body,
including the clothing and associated debris found near the body.
Year of NFPA 1033 First Edition - CORRECT ANS ***1987
Ignition from a pilot flame - CORRECT ANS ***One of the processes that vehicle motor oil is prone to.
Ignition source identification - CORRECT ANS ***Collapsed springs show intense heat exposure but don't
pinpoint what ignited the furniture.
Ignition Temperature - CORRECT ANS ***The minimum temperature needed to heat a fuel so as to
ignite and begin self-sustained combustion.
Ignition Temperature of Power Steering Fluid - CORRECT ANS ***680°F
Immediate post-mortem analysis - CORRECT ANS ***Critical for assessing levels of carbon monoxide in a
victim after removal from fire.
Incandescent Light Bulbs - CORRECT ANS ***An item that tends to 'pull' toward the heat source (*if over
25 watts).
Incandescent light bulbs over 25 watts - CORRECT ANS ***Often pull (sag) toward the heat source.
Incendiary device protocol - CORRECT ANS ***An investigator should notify trained personnel (e.g.,
bomb squad) upon finding an unactivated incendiary device.
