NAFI CFEI OFFICIAL EXAM LATEST 2025 WITH CORRECT
QUESTIONS AND DETAILED ANSWERS/ALREADY
GRADED A+
true - CORRECT ANSWER-Combustion may continue with available oxygen
concentrations lower than 1 percent.
a.True
b.False
true - CORRECT ANSWER-The way structures react in a fire often influence how
the fire grows and spreads as well as how theymaintain their structural integrity
during the fire. Therefore, the fire investigator should considerthe type of
structure and method of construction when completing the analysis of fire growth
and spread as a part of their fire investigation.
a.True
b.False
all of the above - CORRECT ANSWER-Which of the following can be defined as a
fuel gas?
a.Natural gas
,b.Liquefied petroleum gas
c.Manufactured gases
d. all of the above
all of the above - CORRECT ANSWER-Prior to conducting an on scene
investigation many things should be identified, including:
a.Date and time of incident
b.Size and complexity of the incident
c.Purpose of the investigation
d.All of the above
false - CORRECT ANSWER-Materials which have been properly treated with
flame-retardants will not undergo pyrolysis andfor this reason will not ignite.
a.True
b.False
empirical - CORRECT ANSWER-Data that is based on observation or experience
and can be verified is called:
a.Anecdotal data
b.Empirical data
c.Qualitative data
d.Categorical data
,true - CORRECT ANSWER-Inductive reasoning is when all available empirical
data is analyzed using the investigator's experience, training, knowledge and
expertise.
a.True
b.False
deductive reasoning - CORRECT ANSWER-Testing of a hypothesis by comparing
the investigators hypothesis to all known facts is using____________ reasoning.
a.Deductive
b.Inductive
c.Both A and B
d.Neither A or B
true - CORRECT ANSWER-Probable cause is not needed to obtain an
administrative search warrant.
a.True
b.False
conduction - CORRECT ANSWER-Heat transfer to another body or within a body
by direct contact is called:
a.Conduction.
b.Convection.
c.Radiation.
d.Pyrolysis.
, true - CORRECT ANSWER-Fuses and circuit breakers provide protection against
electrical short circuits, ground/earth faults,and load currents that might be
damaging (i.e. overloads) to the building electrical system.Properly functioning
circuit protection may allow the elimination of the buildings wiring system as a
potential cause of the fire.
a.True
b.False
false - CORRECT ANSWER-In pre-flashover conditions the primary heat transfer
mechanism for fire spread through a
compartment is radiation.
a.True
b.False
false - CORRECT ANSWER-In a compartment, flashover occurs because
convective heat energy raises combustible to their auto-ignition temperature.
a.True
b.False
true - CORRECT ANSWER-Luminescent flame temperatures are dependant on
the fuel to oxygen ratio.
a.True
b.False
QUESTIONS AND DETAILED ANSWERS/ALREADY
GRADED A+
true - CORRECT ANSWER-Combustion may continue with available oxygen
concentrations lower than 1 percent.
a.True
b.False
true - CORRECT ANSWER-The way structures react in a fire often influence how
the fire grows and spreads as well as how theymaintain their structural integrity
during the fire. Therefore, the fire investigator should considerthe type of
structure and method of construction when completing the analysis of fire growth
and spread as a part of their fire investigation.
a.True
b.False
all of the above - CORRECT ANSWER-Which of the following can be defined as a
fuel gas?
a.Natural gas
,b.Liquefied petroleum gas
c.Manufactured gases
d. all of the above
all of the above - CORRECT ANSWER-Prior to conducting an on scene
investigation many things should be identified, including:
a.Date and time of incident
b.Size and complexity of the incident
c.Purpose of the investigation
d.All of the above
false - CORRECT ANSWER-Materials which have been properly treated with
flame-retardants will not undergo pyrolysis andfor this reason will not ignite.
a.True
b.False
empirical - CORRECT ANSWER-Data that is based on observation or experience
and can be verified is called:
a.Anecdotal data
b.Empirical data
c.Qualitative data
d.Categorical data
,true - CORRECT ANSWER-Inductive reasoning is when all available empirical
data is analyzed using the investigator's experience, training, knowledge and
expertise.
a.True
b.False
deductive reasoning - CORRECT ANSWER-Testing of a hypothesis by comparing
the investigators hypothesis to all known facts is using____________ reasoning.
a.Deductive
b.Inductive
c.Both A and B
d.Neither A or B
true - CORRECT ANSWER-Probable cause is not needed to obtain an
administrative search warrant.
a.True
b.False
conduction - CORRECT ANSWER-Heat transfer to another body or within a body
by direct contact is called:
a.Conduction.
b.Convection.
c.Radiation.
d.Pyrolysis.
, true - CORRECT ANSWER-Fuses and circuit breakers provide protection against
electrical short circuits, ground/earth faults,and load currents that might be
damaging (i.e. overloads) to the building electrical system.Properly functioning
circuit protection may allow the elimination of the buildings wiring system as a
potential cause of the fire.
a.True
b.False
false - CORRECT ANSWER-In pre-flashover conditions the primary heat transfer
mechanism for fire spread through a
compartment is radiation.
a.True
b.False
false - CORRECT ANSWER-In a compartment, flashover occurs because
convective heat energy raises combustible to their auto-ignition temperature.
a.True
b.False
true - CORRECT ANSWER-Luminescent flame temperatures are dependant on
the fuel to oxygen ratio.
a.True
b.False
