Fire Investigator - master for TCFP
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What is spalling? - Correct Answer-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? - Correct Answer-Pyrolized carbonaceous material
What is oxidation? - Correct Answer-Physical change in appearance of a material
resulting from the combination of oxygen.
What is alloying? - Correct Answer-Mixing two metals heated then cooled to change
their properties. Often melts at a lower temperature.
What is a clean burn? - Correct Answer-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? - Correct Answer-Elemental carbon produced during incomplete
combustion.
What are the four parts of the fire tetrahedron? - Correct Answer-Fuel (reducing agent)
Heat
Oxidizing agent
Uninhibited chemical chain reaction
What kind of reaction absorbs energy, an endothermic or an exothermic reaction? -
Correct Answer-Endothermic
What is heat transfer by direct contact called? - Correct Answer-Conduction
What is heat transfer by gas flow / air movement called? - Correct Answer-Convection
What is heat transfer by microwave energy called? - Correct Answer-Radiation
,What is a fuel controlled fire? - Correct Answer-A fire that is limited by the amount of
combustibles.
What is a ventilation controlled fire? - Correct Answer-A fire that is limited by the amount
of oxygen.
What are the stages of fire growth? - Correct Answer-Ignition
Growth
Flashover
Fully Developed
Decay
What is a flashover? - Correct Answer-The transition phase from growth to fully
developed, where all surfaces reach ignition temperature almost simultaneously.
Is NFPA 921 a guide or a standard? - Correct Answer-It is the Guide for Fire and
Explosion Investigations
What are the six steps of the scientific method? - Correct Answer-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? - Correct Answer-Analyze the
data
What step of the scientific method is deductive reasoning? - Correct Answer-Test the
hypothesis
What is ignition of the underside of the hot gas layer called? - Correct Answer-
Flameover or rollover
What factors influence flashover conditions? - Correct Answer-Size of the compartment
Height of ceiling
Ventilation
Amount of fuel
Layout of fuel
Location of fire in the compartment
What are fire patterns? - Correct Answer-The physical manifestation of the affects of fire
on materials.
,What are the different types of fire patterns on the walls and ceiling? - Correct Answer-
Plume Generated patterns (often V shaped)
Ventilation generated patterns
Hot gas layer patterns (Line of demarcation)
What is calcination? - Correct Answer-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? - Correct
Answer-Bulbs 25 watts or less pull away. Bulbs greater than 25 watts will expand
towards the fire.
What causes heat shadowing? - Correct Answer-An object blocking the travel of
radiated heat.
What is a dead load? - Correct Answer-The weight of things attached to the building,
like flooring, cloumns, and roof coverings.
What is a live load? - Correct Answer-A load that can move, like people, furniture, wind,
water, and snow.
What is compartmentation? - Correct Answer-Design features of a building that limit fire
growth to the room of origin.
What are the five building construction types? - Correct Answer-Type I - Fire resistant
Type II - Non combustible
Type III - Ordinary
Type IV - Heavy timber
Type V - Wood frame
What is ordinary construction? - Correct Answer-Exterior walls are masonry and frame
is wood.
What is wood frame construction? - Correct Answer-Lightweight wood construction,
used in apartments, houses.
What is platform frame construction? - Correct Answer-Each floor is a seperate
platform.
What is balloon frame construction? - Correct Answer-The wall studs extend from the
foundation to the roof.
What is Ohm's Law? - Correct Answer-V=IR
(E = I x R)
What is voltage? - Correct Answer-Pressure
, What is current? - Correct Answer-Flow
What is resistance? - Correct Answer-Friction, opposition to the flow
What is an overload? - Correct Answer-Power needs exceed the circuit's capacity.
Alternating Current VS Direct Current - Correct Answer-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 - Correct Answer-Residential. Three conductors: Two insulated
conductors at 120 V each, and a bare ground wire.
Three phase system - Correct Answer-Commercial. Four conductors: Three insulated
conductors (480, 240, or 208 V), and a bare ground wire.
What is the difference between grounding and bonding? - Correct Answer-Grounding
connects the system to the earth (ground). Bonding connects to systems together so
the charge stays the same between them.
What is overcurrent protection? - Correct Answer-A device that protects the system
from excess current. Includes:
Circuit breakers
Plug fuses
Type S fuses
Time delay fuses
Cartridge fuses
What are the colors of residential wires? - Correct Answer-Hot - black or red
Neutral - gray or white
Ground - bare or green
What are some methods of electrical heat production? - Correct Answer-Resistance
heating
Short circuit
Ground fault
Parting Arc
Excessive current
What is the difference between and arc and a spark? - Correct Answer-Sparks are
thrown metal particles
Arcs are brief discharges of electricity
What is arc tracking? - Correct Answer-Arc following salts, dusts, or liquids along a
path.
Questions And Answers Rated A+ New
Update Assured Satisfaction
What is spalling? - Correct Answer-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? - Correct Answer-Pyrolized carbonaceous material
What is oxidation? - Correct Answer-Physical change in appearance of a material
resulting from the combination of oxygen.
What is alloying? - Correct Answer-Mixing two metals heated then cooled to change
their properties. Often melts at a lower temperature.
What is a clean burn? - Correct Answer-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? - Correct Answer-Elemental carbon produced during incomplete
combustion.
What are the four parts of the fire tetrahedron? - Correct Answer-Fuel (reducing agent)
Heat
Oxidizing agent
Uninhibited chemical chain reaction
What kind of reaction absorbs energy, an endothermic or an exothermic reaction? -
Correct Answer-Endothermic
What is heat transfer by direct contact called? - Correct Answer-Conduction
What is heat transfer by gas flow / air movement called? - Correct Answer-Convection
What is heat transfer by microwave energy called? - Correct Answer-Radiation
,What is a fuel controlled fire? - Correct Answer-A fire that is limited by the amount of
combustibles.
What is a ventilation controlled fire? - Correct Answer-A fire that is limited by the amount
of oxygen.
What are the stages of fire growth? - Correct Answer-Ignition
Growth
Flashover
Fully Developed
Decay
What is a flashover? - Correct Answer-The transition phase from growth to fully
developed, where all surfaces reach ignition temperature almost simultaneously.
Is NFPA 921 a guide or a standard? - Correct Answer-It is the Guide for Fire and
Explosion Investigations
What are the six steps of the scientific method? - Correct Answer-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? - Correct Answer-Analyze the
data
What step of the scientific method is deductive reasoning? - Correct Answer-Test the
hypothesis
What is ignition of the underside of the hot gas layer called? - Correct Answer-
Flameover or rollover
What factors influence flashover conditions? - Correct Answer-Size of the compartment
Height of ceiling
Ventilation
Amount of fuel
Layout of fuel
Location of fire in the compartment
What are fire patterns? - Correct Answer-The physical manifestation of the affects of fire
on materials.
,What are the different types of fire patterns on the walls and ceiling? - Correct Answer-
Plume Generated patterns (often V shaped)
Ventilation generated patterns
Hot gas layer patterns (Line of demarcation)
What is calcination? - Correct Answer-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? - Correct
Answer-Bulbs 25 watts or less pull away. Bulbs greater than 25 watts will expand
towards the fire.
What causes heat shadowing? - Correct Answer-An object blocking the travel of
radiated heat.
What is a dead load? - Correct Answer-The weight of things attached to the building,
like flooring, cloumns, and roof coverings.
What is a live load? - Correct Answer-A load that can move, like people, furniture, wind,
water, and snow.
What is compartmentation? - Correct Answer-Design features of a building that limit fire
growth to the room of origin.
What are the five building construction types? - Correct Answer-Type I - Fire resistant
Type II - Non combustible
Type III - Ordinary
Type IV - Heavy timber
Type V - Wood frame
What is ordinary construction? - Correct Answer-Exterior walls are masonry and frame
is wood.
What is wood frame construction? - Correct Answer-Lightweight wood construction,
used in apartments, houses.
What is platform frame construction? - Correct Answer-Each floor is a seperate
platform.
What is balloon frame construction? - Correct Answer-The wall studs extend from the
foundation to the roof.
What is Ohm's Law? - Correct Answer-V=IR
(E = I x R)
What is voltage? - Correct Answer-Pressure
, What is current? - Correct Answer-Flow
What is resistance? - Correct Answer-Friction, opposition to the flow
What is an overload? - Correct Answer-Power needs exceed the circuit's capacity.
Alternating Current VS Direct Current - Correct Answer-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 - Correct Answer-Residential. Three conductors: Two insulated
conductors at 120 V each, and a bare ground wire.
Three phase system - Correct Answer-Commercial. Four conductors: Three insulated
conductors (480, 240, or 208 V), and a bare ground wire.
What is the difference between grounding and bonding? - Correct Answer-Grounding
connects the system to the earth (ground). Bonding connects to systems together so
the charge stays the same between them.
What is overcurrent protection? - Correct Answer-A device that protects the system
from excess current. Includes:
Circuit breakers
Plug fuses
Type S fuses
Time delay fuses
Cartridge fuses
What are the colors of residential wires? - Correct Answer-Hot - black or red
Neutral - gray or white
Ground - bare or green
What are some methods of electrical heat production? - Correct Answer-Resistance
heating
Short circuit
Ground fault
Parting Arc
Excessive current
What is the difference between and arc and a spark? - Correct Answer-Sparks are
thrown metal particles
Arcs are brief discharges of electricity
What is arc tracking? - Correct Answer-Arc following salts, dusts, or liquids along a
path.
