NFPA 921 EXAM 2025 QUESTIONS
AND ANSWERS
1033 - ....ANSWER ...-NFPA _______________ is a standard that is designed to
establish the minimum JPRs for service as a fire investigator.
Five - ....ANSWER ...-Most NFPA revision cycles have ________ distinct steps.
Deductive Reasoning - ....ANSWER ...-A process of the fire investigator using his
or her own knowledge and skills to challenge or test the hypothesis analytically.
Inductive Reasoning - ....ANSWER ...-The form of reasoning distinguished by the
investigator developing a hypothesis based on the empirical data to explain the events of
the incident.
1. Recognize the Need
2. Define the Problem
3. Collect Data
4. Analyze the Data
5. Develop a Hypothesis
6. Test the Hypothesis - ....ANSWER ...-The steps of the Scientific Method
Pyrolysis - ....ANSWER ...-The process of thermal decomposition
....FOR STUDY PURPOSES...©️2025 ALL RIGHTS RESERVED... 1
, Pyrolysis - ....ANSWER ...-________________ is seen when wood, heated
sufficiently, breaks down the vapors and char.
Vaporization - ....ANSWER ...-For liquids to burn, they must be heated to produce
ignitable mixtures in air through a process known as _______________________.
Combustion - ....ANSWER ...-For a __________________ to occur, four
components must be present.
Fuel - ....ANSWER ...-The material that will be reduced or consumed during the
combustion process.
Oxidizing Agent - ....ANSWER ...-Most fires require an __________________
____________ to support the combustion process.
Heat - ....ANSWER ...-_________________ provides the energy needed to create
and ignite vapors produced from the fuel source.
Uninhibited Chemical Chain Reaction - ....ANSWER ...-One element of the fire
tetrahedron, this provides for the combination and interaction of the other elements.
Thermal Decomposition - ....ANSWER ...-When an irreversible changes occurs in
either solids or liquids, it is called _____________ ____________________.
Premixed Burning - ....ANSWER ...-A flame where the fuel and oxidizer are mixed
prior to combustion.
Diffusion Flame Burning - ....ANSWER ...-A flame in which the fuel and air mix
together at the region of combustion.
....FOR STUDY PURPOSES...©️2025 ALL RIGHTS RESERVED... 2
AND ANSWERS
1033 - ....ANSWER ...-NFPA _______________ is a standard that is designed to
establish the minimum JPRs for service as a fire investigator.
Five - ....ANSWER ...-Most NFPA revision cycles have ________ distinct steps.
Deductive Reasoning - ....ANSWER ...-A process of the fire investigator using his
or her own knowledge and skills to challenge or test the hypothesis analytically.
Inductive Reasoning - ....ANSWER ...-The form of reasoning distinguished by the
investigator developing a hypothesis based on the empirical data to explain the events of
the incident.
1. Recognize the Need
2. Define the Problem
3. Collect Data
4. Analyze the Data
5. Develop a Hypothesis
6. Test the Hypothesis - ....ANSWER ...-The steps of the Scientific Method
Pyrolysis - ....ANSWER ...-The process of thermal decomposition
....FOR STUDY PURPOSES...©️2025 ALL RIGHTS RESERVED... 1
, Pyrolysis - ....ANSWER ...-________________ is seen when wood, heated
sufficiently, breaks down the vapors and char.
Vaporization - ....ANSWER ...-For liquids to burn, they must be heated to produce
ignitable mixtures in air through a process known as _______________________.
Combustion - ....ANSWER ...-For a __________________ to occur, four
components must be present.
Fuel - ....ANSWER ...-The material that will be reduced or consumed during the
combustion process.
Oxidizing Agent - ....ANSWER ...-Most fires require an __________________
____________ to support the combustion process.
Heat - ....ANSWER ...-_________________ provides the energy needed to create
and ignite vapors produced from the fuel source.
Uninhibited Chemical Chain Reaction - ....ANSWER ...-One element of the fire
tetrahedron, this provides for the combination and interaction of the other elements.
Thermal Decomposition - ....ANSWER ...-When an irreversible changes occurs in
either solids or liquids, it is called _____________ ____________________.
Premixed Burning - ....ANSWER ...-A flame where the fuel and oxidizer are mixed
prior to combustion.
Diffusion Flame Burning - ....ANSWER ...-A flame in which the fuel and air mix
together at the region of combustion.
....FOR STUDY PURPOSES...©️2025 ALL RIGHTS RESERVED... 2
