NAFI CFEI EXAM | QUESTIONS AND ANSWERS | VERIFIED AND
WELL DETAILED ANSWERS | LATEST EXAM UPDATE
The basic methodology of the fire investigation should rely on the use of
a______________________and attention to all relevant details a systematic
a systematic approach c . methodology approach d . g b . approximation
approacheneral approach - ANSWER - a . systematic approach
Absolute Temperature
Absolute A temperature measured in Kelvins ( K ) or Rankines ( R ) .
Accelerant
A fuel or oxidizer , often an ignitible liquid , intentionally used to initiate a fire
or increase the rate of growth or spread of fire .
Accident
ANSWER An unplanned event that interrupts an activity and sometimes causes
injury or damage or a chance occurrence arising from unknown causes ; an
unexpected happening due to carelessness , ignorance , and the like .
Active Fire Protection System
A system that uses moving mechanical or electrical parts to achieve a fire
protection goal .
Active Fire Protection System
A system that uses moving mechanical or electrical parts to achieve a fire
protection goal .
Ambient
Someone's or something's surroundings , especially as they pertain to the local
environment ; for example , ambient air and ambient temperature .
Ampacity
The maximum current , in amperes , that a conductor can carry continuously
under the conditions of use without exceeding its temperature rating .
Ampere
,The unit of electric current that is equivalent to a flow of one coulomb per
second ; one coulomb is defined as 6.24 x 10 ^ 18 electrons .
Arc
A high - temperature luminous electric discharge across a gap or through a
medium such as charred insulation .
Arc Mapping
The systematic evaluation of the electrical circuit configuration spatial
relationship of the circuit components , and identification of electrical arc sites
to assist in the identification of the area of origin and analysis of the fire's
spread .
Arc Site
The location on a conductor with localized damage that resulted from an
electrical arc .
Arcing Through Char
Arcing associated with a matrix of charred material ( e.g. , charred conductor
insulation ) that acts as a semiconductive medium .
Area of Origin
A structure , part of a structure , or general geographic location within a fire
scene , in which the " point of origin " of a fire or explosion is reasonably
believed to be located .
Arrow Pattern
A fire pattern displayed on the cross - section of a burned wooden structural
member
Arson
The crime of maliciously and intentionally , or recklessly , starting a fire . or
causing an explosion .
Autoignition
Initiation of combustion by heat but without a spark or flame .
Autoignition Temperature
The lowest temperature at which a combustible material ignites in air without a
spark or flame .
,Backdraft
A deflagration resulting from the sudden introduction of air into a confined
space containing oxygen - deficient products of incomplete combustion .
Bead
A rounded globule of re - solidified metal at the end of the remains of an
electrical conductor that was caused by arcing and is characterized by a sharp
line of demarcation between the melted and unmelted conductor surfaces .
Blast Pressure Front
The expanding leading edge of an explosion reaction that separates a major
difference in pressure between normal ambient pressure ahead of the front and
potentially damaging high pressure at and behind the front .
BLEVE
Explosions involving vessels that contain liquids under pressure at temperatures
above their atmospheric boiling points .
Bonding
The permanent joining of metallic parts to form an electrically conductive path
that ensures electrical continuity and the capacity to conduct safely any current
likely to be imposed .
British Thermal Unit ( BTU )
The quantity of heat required to raise the temperature of one pound of water one
degree Fahrenheit at the pressure of one atmosphere and temperature of 60
degrees Fahrenheit .
Burning Rate
The at which heat energy is generated by burning .
Calcination of Gypsum
A fire effect realized in gypsum products , including wallboard , as a result of
exposure to heat that drives off free and chemically bound water .
Calorie
The amount of heat necessary to raise 1 gram of water 1 degree Celsius at the
pressure of 1 atmosphere and temperature of 15 degrees Celsius .
Cause
, The circumstances , conditions , or agencies that brought about or resulted in
the fire or explosion incident damage to the property resulting from the fire or
explosion incident , or bodily injury or loss of life resulting from the fire or
explosion incident .
Ceiling Jet
ANSWER - A relatively thin layer of flowing hot gases that develops under a
horizontal surface as a result of plume impingement and the flowing gas being
forced to move horizontally .
Ceiling Layer
A buoyant layer of hot gases and smoke produced by a fire in a compartment
Char
Carbonaceous material that has been burned or pyrolyzed and has a blackened
appearance .
Char Blisters
Convex segments of carbonized material separated by cracks or crevasses that
form on the surface of char , forming on materials such as wood as the result of
pyrolysis or burning .
Clean Burn
A distinct and visible fire effect generally apparent on noncombustible surfaces
after combustible layer ( s ) ( such as soot , paint , and paper ) have been burned
away . The effect may also appear where soot has failed to be deposited because
of high surface temperatures .
Combustible
Capable of undergoing combustion
Combustible Gas Indicator
Combustible An instrument that samples air and indicates whether there are
ignitible vapors or gases present
Combustible Liquid
Any liquid that has a closed - cup flash point at or above 37.8 degrees Celsius (
100 degrees Fahrenheit )
Combustion
WELL DETAILED ANSWERS | LATEST EXAM UPDATE
The basic methodology of the fire investigation should rely on the use of
a______________________and attention to all relevant details a systematic
a systematic approach c . methodology approach d . g b . approximation
approacheneral approach - ANSWER - a . systematic approach
Absolute Temperature
Absolute A temperature measured in Kelvins ( K ) or Rankines ( R ) .
Accelerant
A fuel or oxidizer , often an ignitible liquid , intentionally used to initiate a fire
or increase the rate of growth or spread of fire .
Accident
ANSWER An unplanned event that interrupts an activity and sometimes causes
injury or damage or a chance occurrence arising from unknown causes ; an
unexpected happening due to carelessness , ignorance , and the like .
Active Fire Protection System
A system that uses moving mechanical or electrical parts to achieve a fire
protection goal .
Active Fire Protection System
A system that uses moving mechanical or electrical parts to achieve a fire
protection goal .
Ambient
Someone's or something's surroundings , especially as they pertain to the local
environment ; for example , ambient air and ambient temperature .
Ampacity
The maximum current , in amperes , that a conductor can carry continuously
under the conditions of use without exceeding its temperature rating .
Ampere
,The unit of electric current that is equivalent to a flow of one coulomb per
second ; one coulomb is defined as 6.24 x 10 ^ 18 electrons .
Arc
A high - temperature luminous electric discharge across a gap or through a
medium such as charred insulation .
Arc Mapping
The systematic evaluation of the electrical circuit configuration spatial
relationship of the circuit components , and identification of electrical arc sites
to assist in the identification of the area of origin and analysis of the fire's
spread .
Arc Site
The location on a conductor with localized damage that resulted from an
electrical arc .
Arcing Through Char
Arcing associated with a matrix of charred material ( e.g. , charred conductor
insulation ) that acts as a semiconductive medium .
Area of Origin
A structure , part of a structure , or general geographic location within a fire
scene , in which the " point of origin " of a fire or explosion is reasonably
believed to be located .
Arrow Pattern
A fire pattern displayed on the cross - section of a burned wooden structural
member
Arson
The crime of maliciously and intentionally , or recklessly , starting a fire . or
causing an explosion .
Autoignition
Initiation of combustion by heat but without a spark or flame .
Autoignition Temperature
The lowest temperature at which a combustible material ignites in air without a
spark or flame .
,Backdraft
A deflagration resulting from the sudden introduction of air into a confined
space containing oxygen - deficient products of incomplete combustion .
Bead
A rounded globule of re - solidified metal at the end of the remains of an
electrical conductor that was caused by arcing and is characterized by a sharp
line of demarcation between the melted and unmelted conductor surfaces .
Blast Pressure Front
The expanding leading edge of an explosion reaction that separates a major
difference in pressure between normal ambient pressure ahead of the front and
potentially damaging high pressure at and behind the front .
BLEVE
Explosions involving vessels that contain liquids under pressure at temperatures
above their atmospheric boiling points .
Bonding
The permanent joining of metallic parts to form an electrically conductive path
that ensures electrical continuity and the capacity to conduct safely any current
likely to be imposed .
British Thermal Unit ( BTU )
The quantity of heat required to raise the temperature of one pound of water one
degree Fahrenheit at the pressure of one atmosphere and temperature of 60
degrees Fahrenheit .
Burning Rate
The at which heat energy is generated by burning .
Calcination of Gypsum
A fire effect realized in gypsum products , including wallboard , as a result of
exposure to heat that drives off free and chemically bound water .
Calorie
The amount of heat necessary to raise 1 gram of water 1 degree Celsius at the
pressure of 1 atmosphere and temperature of 15 degrees Celsius .
Cause
, The circumstances , conditions , or agencies that brought about or resulted in
the fire or explosion incident damage to the property resulting from the fire or
explosion incident , or bodily injury or loss of life resulting from the fire or
explosion incident .
Ceiling Jet
ANSWER - A relatively thin layer of flowing hot gases that develops under a
horizontal surface as a result of plume impingement and the flowing gas being
forced to move horizontally .
Ceiling Layer
A buoyant layer of hot gases and smoke produced by a fire in a compartment
Char
Carbonaceous material that has been burned or pyrolyzed and has a blackened
appearance .
Char Blisters
Convex segments of carbonized material separated by cracks or crevasses that
form on the surface of char , forming on materials such as wood as the result of
pyrolysis or burning .
Clean Burn
A distinct and visible fire effect generally apparent on noncombustible surfaces
after combustible layer ( s ) ( such as soot , paint , and paper ) have been burned
away . The effect may also appear where soot has failed to be deposited because
of high surface temperatures .
Combustible
Capable of undergoing combustion
Combustible Gas Indicator
Combustible An instrument that samples air and indicates whether there are
ignitible vapors or gases present
Combustible Liquid
Any liquid that has a closed - cup flash point at or above 37.8 degrees Celsius (
100 degrees Fahrenheit )
Combustion
