NAFI CFEI Latest Update 2026 | Exam Prep | High-
Yield Review Guide
1. What is the primary heat transfer mechanism for fire spread in pre-flashover
conditions?
Conduction
Chemical reaction
Radiation
Convection
2. If a fire investigation team arrives at a scene without knowing the size and
complexity of the incident, how might this affect their investigation?
They would be able to gather more evidence.
It could lead to inadequate resource allocation and hinder the
investigation's effectiveness.
It would have no impact on the investigation.
They could proceed without any issues.
3. An increase in ventilation in a fire that is in the decay stage can result in a
deflagration called a: (122)
rollover.
flashover.
flameover.
backdraft.
,4. A fire condition where oxygen rushes into the fire compartment causing
instantaneous re-ignition of the confined fire gases...
Flameover
Backdraft
Flashover
Rollover
5. In a fire investigation, if a witness reports that a room suddenly erupted in
flames after a period of intense heat, what fire phenomenon might this
indicate, and why?
Flashover, because it occurs when the temperature of combustibles
reaches their auto-ignition point due to convective heat.
Smoke explosion, because it suggests a buildup of flammable gases.
Backdraft, because it indicates a sudden influx of oxygen.
Fireball, because it indicates an explosion of fuel vapors.
6. Which type of reasoning is used to test hypotheses?
Inductive
Deductive
Stochastic
Deterministic
7. Another name for a temporal chain of events is a _____ _.
cause-and-effect chart
evidentiary track
, timeline
crime log
8. Describe how flame-retardants influence the process of pyrolysis in treated
materials.
Flame-retardants have no impact on pyrolysis.
Flame-retardants slow down or inhibit the pyrolysis process, making
it less likely for the material to ignite.
Flame-retardants only affect the combustion phase, not pyrolysis.
Flame-retardants accelerate the pyrolysis process, leading to quicker
ignition.
9. What is the effect of flame-retardants on materials in relation to ignition?
They have no effect on ignition.
They cause materials to ignite more easily.
They reduce the likelihood of ignition.
They increase the rate of combustion.
10. Describe the purpose of a timeline in the context of fire investigations.
A timeline is a tool for analyzing chemical reactions in combustion.
A timeline is used to graphically depict events related to a fire or
explosion in chronological order, helping investigators understand
the sequence of occurrences.
A timeline is a representation of the physical layout of a fire scene.
A timeline is a method for predicting future fire incidents based on
past data.
Yield Review Guide
1. What is the primary heat transfer mechanism for fire spread in pre-flashover
conditions?
Conduction
Chemical reaction
Radiation
Convection
2. If a fire investigation team arrives at a scene without knowing the size and
complexity of the incident, how might this affect their investigation?
They would be able to gather more evidence.
It could lead to inadequate resource allocation and hinder the
investigation's effectiveness.
It would have no impact on the investigation.
They could proceed without any issues.
3. An increase in ventilation in a fire that is in the decay stage can result in a
deflagration called a: (122)
rollover.
flashover.
flameover.
backdraft.
,4. A fire condition where oxygen rushes into the fire compartment causing
instantaneous re-ignition of the confined fire gases...
Flameover
Backdraft
Flashover
Rollover
5. In a fire investigation, if a witness reports that a room suddenly erupted in
flames after a period of intense heat, what fire phenomenon might this
indicate, and why?
Flashover, because it occurs when the temperature of combustibles
reaches their auto-ignition point due to convective heat.
Smoke explosion, because it suggests a buildup of flammable gases.
Backdraft, because it indicates a sudden influx of oxygen.
Fireball, because it indicates an explosion of fuel vapors.
6. Which type of reasoning is used to test hypotheses?
Inductive
Deductive
Stochastic
Deterministic
7. Another name for a temporal chain of events is a _____ _.
cause-and-effect chart
evidentiary track
, timeline
crime log
8. Describe how flame-retardants influence the process of pyrolysis in treated
materials.
Flame-retardants have no impact on pyrolysis.
Flame-retardants slow down or inhibit the pyrolysis process, making
it less likely for the material to ignite.
Flame-retardants only affect the combustion phase, not pyrolysis.
Flame-retardants accelerate the pyrolysis process, leading to quicker
ignition.
9. What is the effect of flame-retardants on materials in relation to ignition?
They have no effect on ignition.
They cause materials to ignite more easily.
They reduce the likelihood of ignition.
They increase the rate of combustion.
10. Describe the purpose of a timeline in the context of fire investigations.
A timeline is a tool for analyzing chemical reactions in combustion.
A timeline is used to graphically depict events related to a fire or
explosion in chronological order, helping investigators understand
the sequence of occurrences.
A timeline is a representation of the physical layout of a fire scene.
A timeline is a method for predicting future fire incidents based on
past data.
