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TCFP FIRE INVESTIGATOR EXAM/TCFP FIRE INVESTIGATOR EXAM PREPARATION/
TCFP FIRE INVESTIGATOR PRACTICE EXAM ACTUAL EXAM 250 QUESTIONS AND
CORRECT DETAILED ANSWERS 2025/2026 (100% VERIFIED ANSWERS) |A+GRADE
Fire resistant construction is what type of construction - ......Answer........Type I
Noncombustible construction is what type of construction - ......Answer........Type ii
Ordinary construction is what type of construction - ......Answer........Type iii
Heavy timber construction is what type of construction - ......Answer........Type iv
Wood frame construction is what type of construction - ......Answer........Type v
Platform frame construction - ......Answer........Each floor is a separate platform
Balloon frame construction - ......Answer........Wall studs extend from basement to roof
with no fire stops
Ohm's law - ......Answer........V=ir
Alternating current vs direct current - ......Answer........Ac the electrons flow out from the
source and then back to it. Dc electrons flow one way.
Single phase service - ......Answer........Residential. 3 conductors: 2 insulated conductors
at 120 v each and a bare ground wire.
3 phase service - ......Answer........Commercial. 4 conductors: (480, 240 or 208 v) and a
bare ground wire.
What is the difference between grounding and bonding? - ......Answer........Grounding
connects the system to the earth. Bonding connects two systems together, so the charge
stays the same between them.
Overcurrent protection - ......Answer........A device that protects the system from excess
current such as circuit breakers, plug fuses and time delay
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What are the colors of residential wires? - ......Answer........Hot - black or red neutral - gray
or white ground - bare or green
Black or red wire in residential - ......Answer........Hot
Gray or white wire in residential - ......Answer........Neutral
Green or bare wire in residential - ......Answer........Ground
Flashpoint - ......Answer........The minimum temperature at which liquid releases enough
vapors to form an ignitable mixture with air near the liquids surface.
Fire point - ......Answer........Temperature at which a liquid fuel produces sufficient vapors
to support combustion once the fuel is ignited. The fire point is usually a few degrees
above the flash point.
Pyrolysis - ......Answer........Fuel is chemically changed to flammable vapors
Classification of fires - ......Answer........A, b, c, d, k
Class a fire - ......Answer........Ordinary combustible material such as paper or wood
Class b fire - ......Answer........Involves flammable and combustible liquids and gases such
as gasoline or oil
Class c fire - ......Answer........Energized electrical equipment
Class d fire - ......Answer........Involves combustible metals such as aluminum, magnesium
and sodium
Class k fire - ......Answer........Involves oil and greases used for commercial kitchens
Ceiling jet - ......Answer........Horizontal mushrooming of hot gases and flames across the
ceiling.
Explosions are either _______ or _________. - ......Answer........Mechanical or chemical
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Mechanical explosions - ......Answer........Result of an increase in pressure inside a
confined container
Chemical explosions - ......Answer........Involve rapid, exothermic reactions in which
ignition source initiates the explosion.
Deflagration - ......Answer........Slower reactions and generally fueled by diffused gases or
dust suspended in the air under normal pressure.
Detonation - ......Answer........Most associated with high explosives in which the solid fuel
and the oxidizer for the fuel are under great pressure
Damage resulting from an explosion is classified as either - ......Answer........Low order or
high order
Low order damage - ......Answer........Walls may bulge away from the explosion or fall
outward
High order damage - ......Answer........Structure or structural members are shattered or
splintered
Voltage - ......Answer........Electrical force that causes a charge to move through a
conductor
Series circuit - ......Answer........Circuit configuration in which current flows in one path
through all the components.
Parallel circuit - ......Answer........Circuit configuration in which different components in the
circuit receive current from different pathways
Ampacity - ......Answer........Current carrying capacity of conductors or equipment
expressed in amperes
TCFP FIRE INVESTIGATOR EXAM/TCFP FIRE INVESTIGATOR EXAM PREPARATION/
TCFP FIRE INVESTIGATOR PRACTICE EXAM ACTUAL EXAM 250 QUESTIONS AND
CORRECT DETAILED ANSWERS 2025/2026 (100% VERIFIED ANSWERS) |A+GRADE
Fire resistant construction is what type of construction - ......Answer........Type I
Noncombustible construction is what type of construction - ......Answer........Type ii
Ordinary construction is what type of construction - ......Answer........Type iii
Heavy timber construction is what type of construction - ......Answer........Type iv
Wood frame construction is what type of construction - ......Answer........Type v
Platform frame construction - ......Answer........Each floor is a separate platform
Balloon frame construction - ......Answer........Wall studs extend from basement to roof
with no fire stops
Ohm's law - ......Answer........V=ir
Alternating current vs direct current - ......Answer........Ac the electrons flow out from the
source and then back to it. Dc electrons flow one way.
Single phase service - ......Answer........Residential. 3 conductors: 2 insulated conductors
at 120 v each and a bare ground wire.
3 phase service - ......Answer........Commercial. 4 conductors: (480, 240 or 208 v) and a
bare ground wire.
What is the difference between grounding and bonding? - ......Answer........Grounding
connects the system to the earth. Bonding connects two systems together, so the charge
stays the same between them.
Overcurrent protection - ......Answer........A device that protects the system from excess
current such as circuit breakers, plug fuses and time delay
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What are the colors of residential wires? - ......Answer........Hot - black or red neutral - gray
or white ground - bare or green
Black or red wire in residential - ......Answer........Hot
Gray or white wire in residential - ......Answer........Neutral
Green or bare wire in residential - ......Answer........Ground
Flashpoint - ......Answer........The minimum temperature at which liquid releases enough
vapors to form an ignitable mixture with air near the liquids surface.
Fire point - ......Answer........Temperature at which a liquid fuel produces sufficient vapors
to support combustion once the fuel is ignited. The fire point is usually a few degrees
above the flash point.
Pyrolysis - ......Answer........Fuel is chemically changed to flammable vapors
Classification of fires - ......Answer........A, b, c, d, k
Class a fire - ......Answer........Ordinary combustible material such as paper or wood
Class b fire - ......Answer........Involves flammable and combustible liquids and gases such
as gasoline or oil
Class c fire - ......Answer........Energized electrical equipment
Class d fire - ......Answer........Involves combustible metals such as aluminum, magnesium
and sodium
Class k fire - ......Answer........Involves oil and greases used for commercial kitchens
Ceiling jet - ......Answer........Horizontal mushrooming of hot gases and flames across the
ceiling.
Explosions are either _______ or _________. - ......Answer........Mechanical or chemical
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Mechanical explosions - ......Answer........Result of an increase in pressure inside a
confined container
Chemical explosions - ......Answer........Involve rapid, exothermic reactions in which
ignition source initiates the explosion.
Deflagration - ......Answer........Slower reactions and generally fueled by diffused gases or
dust suspended in the air under normal pressure.
Detonation - ......Answer........Most associated with high explosives in which the solid fuel
and the oxidizer for the fuel are under great pressure
Damage resulting from an explosion is classified as either - ......Answer........Low order or
high order
Low order damage - ......Answer........Walls may bulge away from the explosion or fall
outward
High order damage - ......Answer........Structure or structural members are shattered or
splintered
Voltage - ......Answer........Electrical force that causes a charge to move through a
conductor
Series circuit - ......Answer........Circuit configuration in which current flows in one path
through all the components.
Parallel circuit - ......Answer........Circuit configuration in which different components in the
circuit receive current from different pathways
Ampacity - ......Answer........Current carrying capacity of conductors or equipment
expressed in amperes
