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
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 1
, Pyrolysis - ANSWER✔✔-The process of thermal decomposition
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.
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 2
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
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 1
, Pyrolysis - ANSWER✔✔-The process of thermal decomposition
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.
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 2
