NAFI Test exam 2023 with 100% correct answers
The basic methodology of the fire investigation should rely on the use of a ______________________ and attention to all relevant
details.
a. systematic approach
b. approximation approach
c. methodology approach
d. general approach - correct answersa. systematic approach
With few exceptions, the proper methodolgy for a fire or explosion investigation is to first _____________________ then investigate
the cause, circumstances, conditions, or agencies that brought the ignition source, fuel, and oxidant together.
a. determine responsibility
b. determine and establish origin(s)
c. determine if it is a criminal action
d. all of the above - correct answersb. determine and establish origin(s)
The process of determining the origin, cause, development, and responsibility as well as the failure analysis of a fire or explosion is
the definition of _________________________.
a. fire investigation
b. fire scene reconstruction
c. fire evaluation
d. fire analysis - correct answersd. fire analysis
The process of determining the origin, cause, and responsibility for a fire or explosion is ___________________________.
a. fire analysis
b. fire investigation
c. fire scene survey
d. fire evaluation - correct answersb. fire investigation
The _____________________ is the systematic pursite of knowledge involving the recognition and formulation of a problem, the
collection of data through observation and experiment, and the formulation and testing of a hypothesis.
a. scientific method
b. scientific examination
c. scientific survey
d. scientific theory - correct answersa. scientific method
____________________ are the visible or measurable physical effects that remain after a fire. These include thermal effects on
materials, such as charring, oxidation, consumption of combustibles, smoke and soot deposits, distortion, melting, color changes,
changes in character of materials, structural collapse, and other effects.
a. Fire arrows
b. Fire pointers
c. Fire patterns
d. Flammable patterns - correct answersc. Fire patterns
Distortion, breakage, deterioration, or other fault in an item, component, system, assembly, or structure that results in unsatisfactory
performance of the function for which it was designed is called ________________.
a. broken
b. distorted
c. failure
d. faulty - correct answersc. failure
Vehicle fire inspections may present many other situations that pose safety hazards to the investigator. These can include:
a. fuel leaks
b. expelled lubricants
c. electrical energy stored in the battery
d. all of the above - correct answersd. all of the above
The burn or damage patterns remaining on the body panels and in the interior of the vehicle are primarily used to locate the
______________________.
a. origin of the fire
b. potential ignition sources
c. fuel loads
d. all of the above - correct answersd. all of the above
A wide variety of materials and substances may serve as the first materials ignited in motor vehicle fires. These include engine fuels;
transmission,·power steering, and brake fluids; coolants; lubricants; and the vehicle interior materials or cargo. Once a fire is started,
any of these materials may contribute as a secondary fuel, affecting the fire growth rate and the ultimate damage sustained.
, a. True
b. False - correct answersa. True
Solid fuels are less common than liquids and gasses as the first materials ignited in motor vehicle fires. The exception would be
scenarios where overloaded wiring or smoking materials are possible ignition sources or where the vehicle is subject to an exposure
fire.
a. True
b. False - correct answersa. True
In most instances, the sources of ignition energy in motor vehicle fires are the same as those associated with structural fires, arcs,
overloaded wiring, open flames, and smoking materials. There are, however, some unique sources that should be considered, such
as the hot surfaces of the:
a. catalytic converter
b. turbocharger
c. manifold
d. all of the above - correct answersd. all of the above
When the engine is not running, the primary source of electrical energy in a motor vehicle is the _____________________.
a. alternator
b. distributor
c. battery
d. fuel pump - correct answersc. battery (can also be other components)
14. When the ignition is off and the vehicle is not running, vehicle circuits having a+ 12 volt potential will still supply current from
______________ to ______________.
a. battery to starter
b. battery to alternator
c. battery to ignition
d. all of the above - correct answersd. all of the above
When the ignition is off and the vehicle is not running, vehicle circuits will still supply current to _____________.
a. clock
b. lights
c. power door locks
d. all of the above - correct answersd. all of the above (clock is not listed)
Protection of electrical circuits in motor vehicles is provided by:
a. fuses
b. circuitbreakers
c. fusible links
d. all of the above - correct answersd. all of the above
Electrical problems in circuits protected by fuses cannot start a fire.
a. True
b. False - correct answersb. False
The most common open flame in a carburated vehicle fire is:
a. lighted match
b. pilot flames or operating burners
c. catalytic converter
d. a backfire through the carburator - correct answersd. a backfire through the carburetor (bad question)
There are two basic fuel systems used in gasoline powered motor vehicles:
a. vacuum/low pressure carbureted system
b. high pressure fuel injected system
c. both a & b
d. neither a or b - correct answersc. both a & b
The flash point of gasoline is approximately _____.
a. 100* F
b. 212* F
c. -45* F
d. 25* F - correct answersc. -45* F
Compared to gasoline, brake fluid is a higher flash point liquid.
a. True
b. False - correct answersa. True
Gasoline will normally not ignite on a hot surface but requires a(n) __________ for ignition.
The basic methodology of the fire investigation should rely on the use of a ______________________ and attention to all relevant
details.
a. systematic approach
b. approximation approach
c. methodology approach
d. general approach - correct answersa. systematic approach
With few exceptions, the proper methodolgy for a fire or explosion investigation is to first _____________________ then investigate
the cause, circumstances, conditions, or agencies that brought the ignition source, fuel, and oxidant together.
a. determine responsibility
b. determine and establish origin(s)
c. determine if it is a criminal action
d. all of the above - correct answersb. determine and establish origin(s)
The process of determining the origin, cause, development, and responsibility as well as the failure analysis of a fire or explosion is
the definition of _________________________.
a. fire investigation
b. fire scene reconstruction
c. fire evaluation
d. fire analysis - correct answersd. fire analysis
The process of determining the origin, cause, and responsibility for a fire or explosion is ___________________________.
a. fire analysis
b. fire investigation
c. fire scene survey
d. fire evaluation - correct answersb. fire investigation
The _____________________ is the systematic pursite of knowledge involving the recognition and formulation of a problem, the
collection of data through observation and experiment, and the formulation and testing of a hypothesis.
a. scientific method
b. scientific examination
c. scientific survey
d. scientific theory - correct answersa. scientific method
____________________ are the visible or measurable physical effects that remain after a fire. These include thermal effects on
materials, such as charring, oxidation, consumption of combustibles, smoke and soot deposits, distortion, melting, color changes,
changes in character of materials, structural collapse, and other effects.
a. Fire arrows
b. Fire pointers
c. Fire patterns
d. Flammable patterns - correct answersc. Fire patterns
Distortion, breakage, deterioration, or other fault in an item, component, system, assembly, or structure that results in unsatisfactory
performance of the function for which it was designed is called ________________.
a. broken
b. distorted
c. failure
d. faulty - correct answersc. failure
Vehicle fire inspections may present many other situations that pose safety hazards to the investigator. These can include:
a. fuel leaks
b. expelled lubricants
c. electrical energy stored in the battery
d. all of the above - correct answersd. all of the above
The burn or damage patterns remaining on the body panels and in the interior of the vehicle are primarily used to locate the
______________________.
a. origin of the fire
b. potential ignition sources
c. fuel loads
d. all of the above - correct answersd. all of the above
A wide variety of materials and substances may serve as the first materials ignited in motor vehicle fires. These include engine fuels;
transmission,·power steering, and brake fluids; coolants; lubricants; and the vehicle interior materials or cargo. Once a fire is started,
any of these materials may contribute as a secondary fuel, affecting the fire growth rate and the ultimate damage sustained.
, a. True
b. False - correct answersa. True
Solid fuels are less common than liquids and gasses as the first materials ignited in motor vehicle fires. The exception would be
scenarios where overloaded wiring or smoking materials are possible ignition sources or where the vehicle is subject to an exposure
fire.
a. True
b. False - correct answersa. True
In most instances, the sources of ignition energy in motor vehicle fires are the same as those associated with structural fires, arcs,
overloaded wiring, open flames, and smoking materials. There are, however, some unique sources that should be considered, such
as the hot surfaces of the:
a. catalytic converter
b. turbocharger
c. manifold
d. all of the above - correct answersd. all of the above
When the engine is not running, the primary source of electrical energy in a motor vehicle is the _____________________.
a. alternator
b. distributor
c. battery
d. fuel pump - correct answersc. battery (can also be other components)
14. When the ignition is off and the vehicle is not running, vehicle circuits having a+ 12 volt potential will still supply current from
______________ to ______________.
a. battery to starter
b. battery to alternator
c. battery to ignition
d. all of the above - correct answersd. all of the above
When the ignition is off and the vehicle is not running, vehicle circuits will still supply current to _____________.
a. clock
b. lights
c. power door locks
d. all of the above - correct answersd. all of the above (clock is not listed)
Protection of electrical circuits in motor vehicles is provided by:
a. fuses
b. circuitbreakers
c. fusible links
d. all of the above - correct answersd. all of the above
Electrical problems in circuits protected by fuses cannot start a fire.
a. True
b. False - correct answersb. False
The most common open flame in a carburated vehicle fire is:
a. lighted match
b. pilot flames or operating burners
c. catalytic converter
d. a backfire through the carburator - correct answersd. a backfire through the carburetor (bad question)
There are two basic fuel systems used in gasoline powered motor vehicles:
a. vacuum/low pressure carbureted system
b. high pressure fuel injected system
c. both a & b
d. neither a or b - correct answersc. both a & b
The flash point of gasoline is approximately _____.
a. 100* F
b. 212* F
c. -45* F
d. 25* F - correct answersc. -45* F
Compared to gasoline, brake fluid is a higher flash point liquid.
a. True
b. False - correct answersa. True
Gasoline will normally not ignite on a hot surface but requires a(n) __________ for ignition.
