NAFI CFEI Exam Study Guide with complete
i,- i,- i,- i,- i,- i,- i,-
solutions | Latest 2025/2026 Update. i,- i,- i,- i,-
Fire
i,-i,-A rapid oxidation process, which is a chemical reaction
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
resulting in the evolution of light and heat in varying intensities
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
Fire Plume
i,- Creation of hot gases by fire; the hot gases rise
i,-i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
above the fire itself
i,- i,- i,-
Flame Spread Classified as concurrent or counterflow:
i,- i,-i,- i,- i,- i,- i,- i,- i,-
concurrent-(wide-aided flame spread) occurs when flame spread i,- i,- i,- i,- i,- i,- i,-
direction is the same as the gas flow or wind direction;
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
counterflow-(opposed flame spread) occurs where the flame i,- i,- i,- i,- i,- i,- i,-
spread direction is counter to or opposed to the gas flow
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
Heat a form of energy characterized by vibration of
i,-i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
molecules and capable of initiating and supporting chemical
i,- i,- i,- i,- i,- i,- i,- i,-
changes and changes of state i,- i,- i,- i,-
Ignition Temperature Minimum temperature a substance
i,- i,-i,- i,- i,- i,- i,- i,-
should attain in order to ignite under specific test conditions
i,- i,- i,- i,- i,- i,- i,- i,- i,-
,Lower Explosive Limit (LEL)
i,- The minimum percentage of fuel i,- i,- i,-i,- i,- i,- i,- i,- i,- i,-
in air (by volume) in which combustion can occur
i,- i,- i,- i,- i,- i,- i,- i,-
Upper Explosive Limit
i,- The maximum percentage of fuel in air i,- i,-i,- i,- i,- i,- i,- i,- i,- i,- i,-
in which combustion can occur
i,- i,- i,- i,-
Melting Point Phase change; the material changes from a
i,- i,-i,- i,- i,- i,- i,- i,- i,- i,- i,-
solid to a liquid with no change in the chemical structure of the
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
material (melting candle wax) i,- i,- i,-
Pyrolysis A process in which material is decomposed, or
i,-i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
broken down, into simpler molecular compounds by the effects
i,- i,- i,- i,- i,- i,- i,- i,- i,-
of heat alone; pyrolysis often precedes combustion
i,- i,- i,- i,- i,- i,-
Specific Gravity (Vapor Density)
i,- The ratio of the average i,- i,- i,-i,- i,- i,- i,- i,- i,- i,-
molecular weight of a gas or vapor to the average molecular
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
weight of air i,- i,-
Specific Gravity The ratio of the mass of a given volume of a
i,- i,-i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
substance to the mass of an equal volume of water at a
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
temperature of 4*C i,- i,-
Combustible Liquid i,- i,-i,- i,- Flash Point @ or above 100°F i,- i,- i,- i,- i,-
, Flammable Liquid i,- i,-i,- i,- Flash Point less than 100°F i,- i,- i,- i,-
Ignitable Liquid i,- i,-i,- i,- Both combustible and flammable liquids are
i,- i,- i,- i,- i,- i,-
ignitable liquids.i,-
Evidence - Demonstrative
i,- i,- i,-i,- i,- Tangible items; see, touch, smell, i,- i,- i,- i,- i,-
hear.
Evidence - Documentary
i,- i,-Written form; business records, i,-i,- i,- i,- i,- i,- i,-
banking, calendars, phone records, fire reports, etc...
i,- i,- i,- i,- i,- i,-
Evidence - Testimonial
i,- Competent live witness speaking
i,- i,-i,- i,- i,- i,- i,- i,-
under oath; two types; fact and expert
i,- i,- i,- i,- i,- i,-
Evidence - illustrative
i,- Photos, sketches, maps, diagrams.
i,- i,-i,- i,- i,- i,- i,- i,-
Modes are frequently used at trial.
i,- i,- i,- i,- i,-
Evidence - illustravtive
i,- i,- i,-i,- i,- Photos and Videos; what, why, how, i,- i,- i,- i,- i,- i,-
when
Evidence collectioni,- Document in place, document the i,-i,- i,- i,- i,- i,- i,- i,-
collection, use proper container, (flag, bag, & tag)
i,- i,- i,- i,- i,- i,- i,-
i,- i,- i,- i,- i,- i,- i,-
solutions | Latest 2025/2026 Update. i,- i,- i,- i,-
Fire
i,-i,-A rapid oxidation process, which is a chemical reaction
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
resulting in the evolution of light and heat in varying intensities
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
Fire Plume
i,- Creation of hot gases by fire; the hot gases rise
i,-i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
above the fire itself
i,- i,- i,-
Flame Spread Classified as concurrent or counterflow:
i,- i,-i,- i,- i,- i,- i,- i,- i,-
concurrent-(wide-aided flame spread) occurs when flame spread i,- i,- i,- i,- i,- i,- i,-
direction is the same as the gas flow or wind direction;
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
counterflow-(opposed flame spread) occurs where the flame i,- i,- i,- i,- i,- i,- i,-
spread direction is counter to or opposed to the gas flow
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
Heat a form of energy characterized by vibration of
i,-i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
molecules and capable of initiating and supporting chemical
i,- i,- i,- i,- i,- i,- i,- i,-
changes and changes of state i,- i,- i,- i,-
Ignition Temperature Minimum temperature a substance
i,- i,-i,- i,- i,- i,- i,- i,-
should attain in order to ignite under specific test conditions
i,- i,- i,- i,- i,- i,- i,- i,- i,-
,Lower Explosive Limit (LEL)
i,- The minimum percentage of fuel i,- i,- i,-i,- i,- i,- i,- i,- i,- i,-
in air (by volume) in which combustion can occur
i,- i,- i,- i,- i,- i,- i,- i,-
Upper Explosive Limit
i,- The maximum percentage of fuel in air i,- i,-i,- i,- i,- i,- i,- i,- i,- i,- i,-
in which combustion can occur
i,- i,- i,- i,-
Melting Point Phase change; the material changes from a
i,- i,-i,- i,- i,- i,- i,- i,- i,- i,- i,-
solid to a liquid with no change in the chemical structure of the
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
material (melting candle wax) i,- i,- i,-
Pyrolysis A process in which material is decomposed, or
i,-i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
broken down, into simpler molecular compounds by the effects
i,- i,- i,- i,- i,- i,- i,- i,- i,-
of heat alone; pyrolysis often precedes combustion
i,- i,- i,- i,- i,- i,-
Specific Gravity (Vapor Density)
i,- The ratio of the average i,- i,- i,-i,- i,- i,- i,- i,- i,- i,-
molecular weight of a gas or vapor to the average molecular
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
weight of air i,- i,-
Specific Gravity The ratio of the mass of a given volume of a
i,- i,-i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
substance to the mass of an equal volume of water at a
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
temperature of 4*C i,- i,-
Combustible Liquid i,- i,-i,- i,- Flash Point @ or above 100°F i,- i,- i,- i,- i,-
, Flammable Liquid i,- i,-i,- i,- Flash Point less than 100°F i,- i,- i,- i,-
Ignitable Liquid i,- i,-i,- i,- Both combustible and flammable liquids are
i,- i,- i,- i,- i,- i,-
ignitable liquids.i,-
Evidence - Demonstrative
i,- i,- i,-i,- i,- Tangible items; see, touch, smell, i,- i,- i,- i,- i,-
hear.
Evidence - Documentary
i,- i,-Written form; business records, i,-i,- i,- i,- i,- i,- i,-
banking, calendars, phone records, fire reports, etc...
i,- i,- i,- i,- i,- i,-
Evidence - Testimonial
i,- Competent live witness speaking
i,- i,-i,- i,- i,- i,- i,- i,-
under oath; two types; fact and expert
i,- i,- i,- i,- i,- i,-
Evidence - illustrative
i,- Photos, sketches, maps, diagrams.
i,- i,-i,- i,- i,- i,- i,- i,-
Modes are frequently used at trial.
i,- i,- i,- i,- i,-
Evidence - illustravtive
i,- i,- i,-i,- i,- Photos and Videos; what, why, how, i,- i,- i,- i,- i,- i,-
when
Evidence collectioni,- Document in place, document the i,-i,- i,- i,- i,- i,- i,- i,-
collection, use proper container, (flag, bag, & tag)
i,- i,- i,- i,- i,- i,- i,-
