IAAI CFI STUDY QUESTIONS AND VERIFIED QUESTIONS UPDATED
2024/2025
A liquid with a flash point ABOVE 100F - Combustible Liquid
If the current flowing out from an electrical panel is 12.5 amps, and it then flows through an electrical
load of 1500 watts, what is the amperage of the remaining current flow of the return circuit? - 12.5
If a hair dryer draws 8.3amps (in a home with 120-volt service), what is the wattage?
*Power (P) = current (I) x voltage (V)
Watts = amps x volts - 1000
The year of the first edition of NFPA 1033 - 1987
The recommended distance for securing the perimeter of a blast scene
*That is, the distance from the furthest debris - 1.5 times
What temperature in the upper gas layer causes the onset of Flashover? - 1100°F
The temperature at which copper melts - 1960°F
The measurement of the radiant heat flux (from gas layer to the floor) that indicates the onset of
flashover - 2 W/cm2
The voltage between the two hot wires at the service entrance cables in most single-family residences
in the United States (single-phase service with three wires) - 240 volts
The revision cycle for NFPA 921 (timespan) - 3 years
The flash point of power steering fluid - 350°F
In high-pressure fuel-injected vehicles, this is the typical range of pressure that is used to pump fuel
from a fuel tank - 35-70 p.s.i.
The lower explosive and upper explosive limit of natural gas (methane)? - 5 and 17
The ignition temperature of power steering fluid - 680°F
Any substance that can undergo combustion - Fuel
,Two factors or situations leading to a fire that may show the nature of the incident responsibility. -
Act or Omission
This concept should not be included in a summary report of findings. - Additional Investigative
Recommendations
A law that may govern the fire investigation of a boat - Admiralty Law
A type of device in a vehicle, which can cause an electrical overload to factory installed wiring - After-
market Equipment
Evidence of smoke or soot in the lungs, bronchi, and trachea is one of the most significant factors in
confirming that, at the time of the fire, the victim was WHAT? - Alive and Breathing
Those who have the responsibility for monitoring safety conditions at the fire or explosion scene - All
Team Members
The melting temperature of aluminum - 1220°F
Which one of these is NOT considered a competent ignition source?
Metal-to-metal sparks,
Aluminum-to-pavement sparks,
Metal-to-pavement sparks,
Motor bearing sparks - Aluminum-to-pavement sparks
A meaningful analysis of a fire requires an understanding of the fire growth, the total heat released,
and WHAT? - Heat Release Rate
What does he term AFCI stand for? And, the "A" specifically represents what? - Arc-fault circuit
interrupter
The organization that develops standard methods for testing materials - ASTM
Initiation of combustion by heat but without a spark or flame - Auto-ignition
A deflagration resulting from the sudden introduction of air into a confined space containing oxygen-
deficient products of incomplete combustion - Backdraft
An explosion caused by a combination of combustible materials heated to the ignition point and a
sudden introduction of oxygen to support combustion - Backdraft
A boat device that owners fail to keep clean, which is a frequent cause of engine compartment fires on
boats - Backfire Flame Arrestor
A device on a fluorescent light fixture that transforms the voltage from normal household voltage to a
higher voltage - Ballast
, The starter motor draws its energy from this source - Battery
The burden of proof in a criminal trial - Beyond a Reasonable Doubt
The component that controls temperature in many heat-producing appliances - Bimetallic
Thermostats
This may occur when the vapor pressure of a liquid exceeds atmospheric pressure
*And this is the most common mechanical explosion - BLEVE
The temperature or point at which the vapor pressure of a liquid equals the external pressure applied
- Boiling Point
The process of electrically connecting two or more conductive objects - Bonding
Most engine fires typically penetrate the interior compartment at this location of the vehicle - Bottom
Passenger Side of the Windshield
An investigator can closely examine this component of a cord to determine if it was plugged into a
receptacle - Brass Prongs (male ends)
The chemical and physical changes that occur in gypsum wallboard surfaces during a fire - Calcination
A narcotic gas that one might be exposed to in the fire - Carbon Monoxide
The levels of this toxin dissipate over time after removal from the fire environment. - Carbon
Monoxide
This toxic condition does NOT cause a cherry-pink coloration to the skin of the fire victim and is NOT
visible on all skin types - Carbon Monoxide Poisoning
This occurrence is the most common open-flame ignition source in non-fuel injected vehicles -
Carburetor Backfire
When the fire plume reaches the ceiling of a room and moves laterally along the ceiling - Ceiling jet
An item in the home that burns at a peak HRR of 3000-5000kW, which is hotter than a pool of gasoline
or a polyurethane chair - Christmas Tree
This occurs when intense radiated heat or direct flame contacts a surface during the fire, burning away
deposits - Clean Burn
This is a fire effect to furniture that does NOT provide the investigators with clues concerning the type
of ignition source, but can show fire spread and intensity - Collapsed Furniture Springs
2024/2025
A liquid with a flash point ABOVE 100F - Combustible Liquid
If the current flowing out from an electrical panel is 12.5 amps, and it then flows through an electrical
load of 1500 watts, what is the amperage of the remaining current flow of the return circuit? - 12.5
If a hair dryer draws 8.3amps (in a home with 120-volt service), what is the wattage?
*Power (P) = current (I) x voltage (V)
Watts = amps x volts - 1000
The year of the first edition of NFPA 1033 - 1987
The recommended distance for securing the perimeter of a blast scene
*That is, the distance from the furthest debris - 1.5 times
What temperature in the upper gas layer causes the onset of Flashover? - 1100°F
The temperature at which copper melts - 1960°F
The measurement of the radiant heat flux (from gas layer to the floor) that indicates the onset of
flashover - 2 W/cm2
The voltage between the two hot wires at the service entrance cables in most single-family residences
in the United States (single-phase service with three wires) - 240 volts
The revision cycle for NFPA 921 (timespan) - 3 years
The flash point of power steering fluid - 350°F
In high-pressure fuel-injected vehicles, this is the typical range of pressure that is used to pump fuel
from a fuel tank - 35-70 p.s.i.
The lower explosive and upper explosive limit of natural gas (methane)? - 5 and 17
The ignition temperature of power steering fluid - 680°F
Any substance that can undergo combustion - Fuel
,Two factors or situations leading to a fire that may show the nature of the incident responsibility. -
Act or Omission
This concept should not be included in a summary report of findings. - Additional Investigative
Recommendations
A law that may govern the fire investigation of a boat - Admiralty Law
A type of device in a vehicle, which can cause an electrical overload to factory installed wiring - After-
market Equipment
Evidence of smoke or soot in the lungs, bronchi, and trachea is one of the most significant factors in
confirming that, at the time of the fire, the victim was WHAT? - Alive and Breathing
Those who have the responsibility for monitoring safety conditions at the fire or explosion scene - All
Team Members
The melting temperature of aluminum - 1220°F
Which one of these is NOT considered a competent ignition source?
Metal-to-metal sparks,
Aluminum-to-pavement sparks,
Metal-to-pavement sparks,
Motor bearing sparks - Aluminum-to-pavement sparks
A meaningful analysis of a fire requires an understanding of the fire growth, the total heat released,
and WHAT? - Heat Release Rate
What does he term AFCI stand for? And, the "A" specifically represents what? - Arc-fault circuit
interrupter
The organization that develops standard methods for testing materials - ASTM
Initiation of combustion by heat but without a spark or flame - Auto-ignition
A deflagration resulting from the sudden introduction of air into a confined space containing oxygen-
deficient products of incomplete combustion - Backdraft
An explosion caused by a combination of combustible materials heated to the ignition point and a
sudden introduction of oxygen to support combustion - Backdraft
A boat device that owners fail to keep clean, which is a frequent cause of engine compartment fires on
boats - Backfire Flame Arrestor
A device on a fluorescent light fixture that transforms the voltage from normal household voltage to a
higher voltage - Ballast
, The starter motor draws its energy from this source - Battery
The burden of proof in a criminal trial - Beyond a Reasonable Doubt
The component that controls temperature in many heat-producing appliances - Bimetallic
Thermostats
This may occur when the vapor pressure of a liquid exceeds atmospheric pressure
*And this is the most common mechanical explosion - BLEVE
The temperature or point at which the vapor pressure of a liquid equals the external pressure applied
- Boiling Point
The process of electrically connecting two or more conductive objects - Bonding
Most engine fires typically penetrate the interior compartment at this location of the vehicle - Bottom
Passenger Side of the Windshield
An investigator can closely examine this component of a cord to determine if it was plugged into a
receptacle - Brass Prongs (male ends)
The chemical and physical changes that occur in gypsum wallboard surfaces during a fire - Calcination
A narcotic gas that one might be exposed to in the fire - Carbon Monoxide
The levels of this toxin dissipate over time after removal from the fire environment. - Carbon
Monoxide
This toxic condition does NOT cause a cherry-pink coloration to the skin of the fire victim and is NOT
visible on all skin types - Carbon Monoxide Poisoning
This occurrence is the most common open-flame ignition source in non-fuel injected vehicles -
Carburetor Backfire
When the fire plume reaches the ceiling of a room and moves laterally along the ceiling - Ceiling jet
An item in the home that burns at a peak HRR of 3000-5000kW, which is hotter than a pool of gasoline
or a polyurethane chair - Christmas Tree
This occurs when intense radiated heat or direct flame contacts a surface during the fire, burning away
deposits - Clean Burn
This is a fire effect to furniture that does NOT provide the investigators with clues concerning the type
of ignition source, but can show fire spread and intensity - Collapsed Furniture Springs
