FIRE INVESTIGATOR FINAL EXAM
WITH CORRECT SOLURIONS
Fire Investigation - ANS >> the process of determining the origin, cause, and
development of a fire or explosion
Standard - ANS >> a document which contains mandatory provisions
Guide - ANS >> a document that is advisory or informative in nature and contains only
nonmandatory provisions
NFPA 921 - ANS >> Guide for fire and explosion investigations
NFPA 033 - ANS >> Standard for professional qualifications for fire investigator
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NFPA 031 - ANS >> Standard for professional qualifications for fire inspector and plan
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examiner
NFPA 70 - ANS >> National Electric Code (NEC)
Steps to investigate a fire - ANS >> . Receive the assignment
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2. Prepare for the investigation
3. Conduct the investigation
4. Collect and preserve evidence
5. Analyze the incident
6. Draw conclusions
7. Report
Scientific Method - ANS >> the systematic pursuit of knowledge
Steps to the scientific method - ANS >> . Recognize of the need to use the scientific
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method
2. Define the problem
3. Collect Data
4. Analyze the Data
5. Develop a Hypothesis or Hypotheses
6. Test the Hypothesis
(7. Select a Final Hypothesis)
(8. Report)
Scene safety assessment - ANS >> inspection to determine whether the scene is safe
to enter or what steps would be necessary to render the scene safe
, What is the first thing we do when we arrive on scene? - ANS >> Scene safety
assessment
Hypothesis certainty - ANS >> Probable
Possible
Suspected
Fire - ANS >> a rapid oxidation resulting in the evolution of heat and light
Fire Triangle - ANS >> The three components required to initiate combustion - heat,
fuel, and oxygen
Fire tetrahedron - ANS >> The four components required to sustain combustion - heat,
fuel, oxygen, and uninhibited chemical chain reaction
Pyrolysis - ANS >> decomposition of a material into simpler molecular compounds by
the effects of heat
Vaporization - ANS >> heating liquids to produce ignitable vapors
Specific Gravity - ANS >> The density of a substance in comparison to water
What are the three states of matter? - ANS >> Solid, liquid, and gas.
In which phase does fire occur? - ANS >> Gas phase.
probable - ANS >> More likely true than not (>50% likely).
possible - ANS >> Feasible; often used when two hypotheses have the same level of
certainty.
suspected - ANS >> When the opinion does not qualify as an expert opinion.
What are the two types of combustion? - ANS >> Flaming and smoldering/glowing.
What are the characteristics of LPG? - ANS >> Colorless, odorless, non-toxic.
Flammable range .5 - 5%. Vapor density .88 (will sink).
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What are the characteristics of propane? - ANS >> Colorless, odorless, non-toxic.
Flammable range 2 - 0%. Vapor density .55 (will sink).
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What are the characteristics of natural gas? - ANS >> Colorless, odorless, non-toxic.
Flammable range 5 - 5%. Vapor density 0.68 (will float).
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WITH CORRECT SOLURIONS
Fire Investigation - ANS >> the process of determining the origin, cause, and
development of a fire or explosion
Standard - ANS >> a document which contains mandatory provisions
Guide - ANS >> a document that is advisory or informative in nature and contains only
nonmandatory provisions
NFPA 921 - ANS >> Guide for fire and explosion investigations
NFPA 033 - ANS >> Standard for professional qualifications for fire investigator
zx
NFPA 031 - ANS >> Standard for professional qualifications for fire inspector and plan
zx
examiner
NFPA 70 - ANS >> National Electric Code (NEC)
Steps to investigate a fire - ANS >> . Receive the assignment
zx
2. Prepare for the investigation
3. Conduct the investigation
4. Collect and preserve evidence
5. Analyze the incident
6. Draw conclusions
7. Report
Scientific Method - ANS >> the systematic pursuit of knowledge
Steps to the scientific method - ANS >> . Recognize of the need to use the scientific
zx
method
2. Define the problem
3. Collect Data
4. Analyze the Data
5. Develop a Hypothesis or Hypotheses
6. Test the Hypothesis
(7. Select a Final Hypothesis)
(8. Report)
Scene safety assessment - ANS >> inspection to determine whether the scene is safe
to enter or what steps would be necessary to render the scene safe
, What is the first thing we do when we arrive on scene? - ANS >> Scene safety
assessment
Hypothesis certainty - ANS >> Probable
Possible
Suspected
Fire - ANS >> a rapid oxidation resulting in the evolution of heat and light
Fire Triangle - ANS >> The three components required to initiate combustion - heat,
fuel, and oxygen
Fire tetrahedron - ANS >> The four components required to sustain combustion - heat,
fuel, oxygen, and uninhibited chemical chain reaction
Pyrolysis - ANS >> decomposition of a material into simpler molecular compounds by
the effects of heat
Vaporization - ANS >> heating liquids to produce ignitable vapors
Specific Gravity - ANS >> The density of a substance in comparison to water
What are the three states of matter? - ANS >> Solid, liquid, and gas.
In which phase does fire occur? - ANS >> Gas phase.
probable - ANS >> More likely true than not (>50% likely).
possible - ANS >> Feasible; often used when two hypotheses have the same level of
certainty.
suspected - ANS >> When the opinion does not qualify as an expert opinion.
What are the two types of combustion? - ANS >> Flaming and smoldering/glowing.
What are the characteristics of LPG? - ANS >> Colorless, odorless, non-toxic.
Flammable range .5 - 5%. Vapor density .88 (will sink).
zx zx zx
What are the characteristics of propane? - ANS >> Colorless, odorless, non-toxic.
Flammable range 2 - 0%. Vapor density .55 (will sink).
zx zx
What are the characteristics of natural gas? - ANS >> Colorless, odorless, non-toxic.
Flammable range 5 - 5%. Vapor density 0.68 (will float).
zx
