NAFI Test exam with 100% correct answers {2024
GRADED A}
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 ANSWER a. 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 ANSWER b. 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 ANSWER d. 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 ANSWER b. 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 ANSWER a. 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 ANSWER c. 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 ANSWER c. 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 ANSWER d. 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 ANSWER d. 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 ANSWER a. 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 ANSWER a. 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 ANSWER d. 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 ANSWER c. 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 ANSWER d. 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 ANSWER d. 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 ANSWER d. all of the above
Electrical problems in circuits protected by fuses cannot start a fire.
a. True
b. False - CORRECT ANSWER b. 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 ANSWER d. 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
