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TCFP FIRE INVESTIGATOR EXAM LATEST 2024/2025
WITH ACTUAL QUESTIONS AND CORRECT VERIFIED
ANSWERS/ALREADY GRADED A+
Is NFPA 921 a guide or a standard? - (answers)It is the Guide for Fire and Explosion Investigations
What are the six steps of the scientific method? - (answers)Recognize the need
Define the problem
Collect the data
Analyze the data
Develop a hypothesis
Test the hypothesis
What step of the scientific method is inductive reasoning? - (answers)Analyze the data
What step of the scientific method is deductive reasoning? - (answers)Test the hypothesis
What are the four parts of the fire tetrahedron? - (answers)Fuel (reducing agent)
Heat
Oxidizing agent
Uninhibited chemical chain reaction
What kind of reaction absorbs energy, an endothermic or an exothermic reaction? -
(answers)Endothermic
What is heat transfer by direct contact called? - (answers)Conduction
What is heat transfer by gas flow / air movement called? - (answers)Convection
What is heat transfer by microwave energy called? - (answers)Radiation
What is a fuel controlled fire? - (answers)A fire that is limited by the amount of combustibles.
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What is a ventilation controlled fire? - (answers)A fire that is limited by the amount of oxygen.
What are the stages of fire growth? - (answers)Ignition
Growth
Flashover
Fully Developed
Decay
What is a flashover? - (answers)The transition phase from growth to fully developed, where all
surfaces reach ignition temperature almost simultaneously.
What is ignition of the underside of the hot gas layer called? - (answers)Flameover or rollover
What factors influence flashover conditions? - (answers)Size of the compartment
Height of ceiling
Ventilation
Amount of fuel
Layout of fuel
Location of fire in the compartment
What are fire patterns? - (answers)The physical manifestation of the affects of fire on materials.
What are the different types of fire patterns on the walls and ceiling? - (answers)Plume Generated
patterns (often V shaped)
Ventilation generated patterns
Hot gas layer patterns (Line of demarcation)
What is spalling? - (answers)The separation of chunks of concrete with explosive force caused by the
expansion of water (moisture) trapped in the concrete as it turns to steam
What is char? - (answers)Pyrolized carbonaceous material
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What is oxidation? - (answers)Physical change in appearance of a material resulting from the
combination of oxygen.
What is alloying? - (answers)Mixing two metals heated then cooled to change their properties. Often
melts at a lower temperature.
What is a clean burn? - (answers)When there was enough heat to burn away all carbon deposits
(soot) on a surface leaving a "clean" surface. Occurs on non-combustible surfaces.
What is soot? - (answers)Elemental carbon produced during incomplete combustion.
What is calcination? - (answers)When chemically bound water is driven out of gypsum walls by the
heat of the fire.
Does a 25 Watt light bulb expand towards the fire or pull inward away from it? - (answers)Bulbs 25
watts or less pull away. Bulbs greater than 25 watts will expand towards the fire.
What causes heat shadowing? - (answers)An object blocking the travel of radiated heat.
What is a dead load? - (answers)The weight of things attached to the building, like flooring, cloumns,
and roof coverings.
What is a live load? - (answers)A load that can move, like people, furniture, wind, water, and snow.
What is compartmentation? - (answers)Design features of a building that limit fire growth to the
room of origin.
What are the five building construction types? - (answers)Type I - Fire resistant
Type II - Non combustible
Type III - Ordinary
Type IV - Heavy timber
Type V - Wood frame
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What is ordinary construction? - (answers)Exterior walls are masonry and frame is wood.
What is wood frame construction? - (answers)Lightweight wood construction, used in apartments,
houses.
What is platform frame construction? - (answers)Each floor is a seperate platform.
What is balloon frame construction? - (answers)The wall studs extend from the foundation to the
roof.
What is Ohm's Law? - (answers)V=IR
(E = I x R)
What is voltage? - (answers)Pressure
What is current? - (answers)Flow
What is resistance? - (answers)Friction, opposition to the flow
What is an overload? - (answers)Power needs exceed the circuit's capacity.
Alternating Current VS Direct Current - (answers)Alternating current - the electrons flow out from
the source and then back to it, alternating directions.
Direct current - electrons flow one way.
Single Phase service - (answers)Residential. Three conductors: Two insulated conductors at 120 V
each, and a bare ground wire.
Three phase system - (answers)Commercial. Four conductors: Three insulated conductors (480, 240,
or 208 V), and a bare ground wire.
TCFP FIRE INVESTIGATOR EXAM LATEST 2024/2025
WITH ACTUAL QUESTIONS AND CORRECT VERIFIED
ANSWERS/ALREADY GRADED A+
Is NFPA 921 a guide or a standard? - (answers)It is the Guide for Fire and Explosion Investigations
What are the six steps of the scientific method? - (answers)Recognize the need
Define the problem
Collect the data
Analyze the data
Develop a hypothesis
Test the hypothesis
What step of the scientific method is inductive reasoning? - (answers)Analyze the data
What step of the scientific method is deductive reasoning? - (answers)Test the hypothesis
What are the four parts of the fire tetrahedron? - (answers)Fuel (reducing agent)
Heat
Oxidizing agent
Uninhibited chemical chain reaction
What kind of reaction absorbs energy, an endothermic or an exothermic reaction? -
(answers)Endothermic
What is heat transfer by direct contact called? - (answers)Conduction
What is heat transfer by gas flow / air movement called? - (answers)Convection
What is heat transfer by microwave energy called? - (answers)Radiation
What is a fuel controlled fire? - (answers)A fire that is limited by the amount of combustibles.
, 2
What is a ventilation controlled fire? - (answers)A fire that is limited by the amount of oxygen.
What are the stages of fire growth? - (answers)Ignition
Growth
Flashover
Fully Developed
Decay
What is a flashover? - (answers)The transition phase from growth to fully developed, where all
surfaces reach ignition temperature almost simultaneously.
What is ignition of the underside of the hot gas layer called? - (answers)Flameover or rollover
What factors influence flashover conditions? - (answers)Size of the compartment
Height of ceiling
Ventilation
Amount of fuel
Layout of fuel
Location of fire in the compartment
What are fire patterns? - (answers)The physical manifestation of the affects of fire on materials.
What are the different types of fire patterns on the walls and ceiling? - (answers)Plume Generated
patterns (often V shaped)
Ventilation generated patterns
Hot gas layer patterns (Line of demarcation)
What is spalling? - (answers)The separation of chunks of concrete with explosive force caused by the
expansion of water (moisture) trapped in the concrete as it turns to steam
What is char? - (answers)Pyrolized carbonaceous material
, 3
What is oxidation? - (answers)Physical change in appearance of a material resulting from the
combination of oxygen.
What is alloying? - (answers)Mixing two metals heated then cooled to change their properties. Often
melts at a lower temperature.
What is a clean burn? - (answers)When there was enough heat to burn away all carbon deposits
(soot) on a surface leaving a "clean" surface. Occurs on non-combustible surfaces.
What is soot? - (answers)Elemental carbon produced during incomplete combustion.
What is calcination? - (answers)When chemically bound water is driven out of gypsum walls by the
heat of the fire.
Does a 25 Watt light bulb expand towards the fire or pull inward away from it? - (answers)Bulbs 25
watts or less pull away. Bulbs greater than 25 watts will expand towards the fire.
What causes heat shadowing? - (answers)An object blocking the travel of radiated heat.
What is a dead load? - (answers)The weight of things attached to the building, like flooring, cloumns,
and roof coverings.
What is a live load? - (answers)A load that can move, like people, furniture, wind, water, and snow.
What is compartmentation? - (answers)Design features of a building that limit fire growth to the
room of origin.
What are the five building construction types? - (answers)Type I - Fire resistant
Type II - Non combustible
Type III - Ordinary
Type IV - Heavy timber
Type V - Wood frame
, 4
What is ordinary construction? - (answers)Exterior walls are masonry and frame is wood.
What is wood frame construction? - (answers)Lightweight wood construction, used in apartments,
houses.
What is platform frame construction? - (answers)Each floor is a seperate platform.
What is balloon frame construction? - (answers)The wall studs extend from the foundation to the
roof.
What is Ohm's Law? - (answers)V=IR
(E = I x R)
What is voltage? - (answers)Pressure
What is current? - (answers)Flow
What is resistance? - (answers)Friction, opposition to the flow
What is an overload? - (answers)Power needs exceed the circuit's capacity.
Alternating Current VS Direct Current - (answers)Alternating current - the electrons flow out from
the source and then back to it, alternating directions.
Direct current - electrons flow one way.
Single Phase service - (answers)Residential. Three conductors: Two insulated conductors at 120 V
each, and a bare ground wire.
Three phase system - (answers)Commercial. Four conductors: Three insulated conductors (480, 240,
or 208 V), and a bare ground wire.
