NAFI CFEI Study Guide With Complete
Solutions.
Evidence - Demonstrative - Answer Tangible items; see, touch, smell, hear.
Evidence - Documentary - Answer Written form; business records, banking,
calendars, phone records, fire reports, etc...
Evidence - Testimonial - Answer Competent live witness speaking under oath; two
types; fact and expert
Evidence - illustrative - Answer Photos, sketches, maps, diagrams. Modes are
frequently used at trial.
Evidence - illustravtive - Answer Photos and Videos; what, why, how, when
Evidence collection - Answer Document in place, document the collection, use
proper container, (flag, bag, & tag)
Evidence - collection - Answer Fuel gas powered tools outside the perimeter. Find
out where tools were refuels.
Heat transfer - Answer Conduction, convection, radiation
Interviews - Answer Purpose of the interview; prepare for the interview, document
the interview
Vehicle Fires - Answer Sparks from an aluminum wheel are not a competent ignition
source.
Vehicle Fires - Answer The most common source of an open flame in a vehicle is an
exhaust system backfire out of a carburetor.
Vehicle Fires - Answer Carburetor backfire leaves a distinct pattern on the hood.
Vehicle Fires - Answer Two basic fuel systems: vacuum/low pressure carbureted
system, and high-pressure, fuel injected system.
Vehicle Fires - Answer Loose battery connections; not over-current protected; loose
connections can result in intermittent arcing.
Vehicle Fires - Answer Power steering fluid: Flashpoint 347-356*F, autoignition 680-
720*F.
Vehicle Fires - Answer Automatic Transmission Fluid: Flashpoint 302-536*F,
autoignition 626-716*F.
Vehicle Fires - Answer Overcharging a battery does not cause it to explode.
Explosions - Answer Low order damage: characterized by walls bulge out or laid
down, virtually intact, next to the structure. roofs slightly left.
, NAFI CFEI Study Guide With Complete
Solutions.
Explosions - Answer High order damage: shattering of the structure, producing small
debris pieces.
Explosions - Answer Post blast effects: burned debris away-fire preceded, unburned
the debris away-no fire.
Explosions - Answer Dust explosions: most often occur in confined areas of relatively
wide dispersal.
Explosions - Answer Search 1.5 times further than the farthest piece of debris.
Fire effects/ fire patterns - Answer Char shrinks as it forms. More reliable for
evaluating fire spread, deduce the direction based on depth, large shiny blisters
(alligatoring) is not evidence of the use of an accelerant.
Fire effects/fire patterns - Answer Spalling: loss of surface material due to cracking,
breaking, chipping, breakdown in surface tensile strength, moisture present in the
concrete, may appear lighter in color.
Fire effects/fire patterns - Answer Crazed glass: caused by rapid cooling.
Fire effects/fire patterns - Answer Light bulbs 25W or more "pull" (gases expand and
bubble out); 25W or less contain a vacuum and can pull in.
Fire effects/fire patterns - Answer Annealing (softening) of springs may provide clues
concerning direction, duration, and intensity.
Fire effects/fire patterns - Answer Saddle burns - A U-shaped burn pattern found on
the top of floor joists, caused by fire burning down through the floor. Often, a saddle
burn is caused by a burning liquid on the floor or radiant heat from a material close to
the floor. Saddle burns display deep charring.
Fire effects/fire patterns - Answer Inverted cone burns are indicative of the vertical
flame plume not reaching the ceiling, short-lived fires with a low HRR
Fire effects/fire patterns - Answer Melting Temperatures: Copper 1981*F; Aluminum
1220*F; Steel 2760*F
Heat Sources - Answer Mechanical: converted to heat when two materials rub
against each other and create friction.
Chemical: chemical reaction; exothermic and endothermic.
Electrical: Converted to heat energy; flowing through a conductor.
Nuclear: splitting the nucleus of an atom into two smaller nuclei (nuclear fission)
Solutions.
Evidence - Demonstrative - Answer Tangible items; see, touch, smell, hear.
Evidence - Documentary - Answer Written form; business records, banking,
calendars, phone records, fire reports, etc...
Evidence - Testimonial - Answer Competent live witness speaking under oath; two
types; fact and expert
Evidence - illustrative - Answer Photos, sketches, maps, diagrams. Modes are
frequently used at trial.
Evidence - illustravtive - Answer Photos and Videos; what, why, how, when
Evidence collection - Answer Document in place, document the collection, use
proper container, (flag, bag, & tag)
Evidence - collection - Answer Fuel gas powered tools outside the perimeter. Find
out where tools were refuels.
Heat transfer - Answer Conduction, convection, radiation
Interviews - Answer Purpose of the interview; prepare for the interview, document
the interview
Vehicle Fires - Answer Sparks from an aluminum wheel are not a competent ignition
source.
Vehicle Fires - Answer The most common source of an open flame in a vehicle is an
exhaust system backfire out of a carburetor.
Vehicle Fires - Answer Carburetor backfire leaves a distinct pattern on the hood.
Vehicle Fires - Answer Two basic fuel systems: vacuum/low pressure carbureted
system, and high-pressure, fuel injected system.
Vehicle Fires - Answer Loose battery connections; not over-current protected; loose
connections can result in intermittent arcing.
Vehicle Fires - Answer Power steering fluid: Flashpoint 347-356*F, autoignition 680-
720*F.
Vehicle Fires - Answer Automatic Transmission Fluid: Flashpoint 302-536*F,
autoignition 626-716*F.
Vehicle Fires - Answer Overcharging a battery does not cause it to explode.
Explosions - Answer Low order damage: characterized by walls bulge out or laid
down, virtually intact, next to the structure. roofs slightly left.
, NAFI CFEI Study Guide With Complete
Solutions.
Explosions - Answer High order damage: shattering of the structure, producing small
debris pieces.
Explosions - Answer Post blast effects: burned debris away-fire preceded, unburned
the debris away-no fire.
Explosions - Answer Dust explosions: most often occur in confined areas of relatively
wide dispersal.
Explosions - Answer Search 1.5 times further than the farthest piece of debris.
Fire effects/ fire patterns - Answer Char shrinks as it forms. More reliable for
evaluating fire spread, deduce the direction based on depth, large shiny blisters
(alligatoring) is not evidence of the use of an accelerant.
Fire effects/fire patterns - Answer Spalling: loss of surface material due to cracking,
breaking, chipping, breakdown in surface tensile strength, moisture present in the
concrete, may appear lighter in color.
Fire effects/fire patterns - Answer Crazed glass: caused by rapid cooling.
Fire effects/fire patterns - Answer Light bulbs 25W or more "pull" (gases expand and
bubble out); 25W or less contain a vacuum and can pull in.
Fire effects/fire patterns - Answer Annealing (softening) of springs may provide clues
concerning direction, duration, and intensity.
Fire effects/fire patterns - Answer Saddle burns - A U-shaped burn pattern found on
the top of floor joists, caused by fire burning down through the floor. Often, a saddle
burn is caused by a burning liquid on the floor or radiant heat from a material close to
the floor. Saddle burns display deep charring.
Fire effects/fire patterns - Answer Inverted cone burns are indicative of the vertical
flame plume not reaching the ceiling, short-lived fires with a low HRR
Fire effects/fire patterns - Answer Melting Temperatures: Copper 1981*F; Aluminum
1220*F; Steel 2760*F
Heat Sources - Answer Mechanical: converted to heat when two materials rub
against each other and create friction.
Chemical: chemical reaction; exothermic and endothermic.
Electrical: Converted to heat energy; flowing through a conductor.
Nuclear: splitting the nucleus of an atom into two smaller nuclei (nuclear fission)
