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 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.
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 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 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
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 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.
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 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 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
