Fire Investigator - master for TCFP test ? Questions & Answers
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Fire Investigator - master for TCFP
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Fire Investigator - Master For TCFP
Is NFPA 921 a guide or a standard? - ANSWERSIt is the Guide for Fire and Explosion Investigations
What are the six steps of the scientific method? - ANSWERSRecognize the need
Define the problem
Collect the data
Analyze the data
Develop a hypothesis
Test the hypothesis
What step of the sc...
Fire Investigator - master for TCFP test ?
Questions & Answers
Is NFPA 921 a guide or a standard? - ANSWERSIt is the Guide for Fire and Explosion
Investigations
What are the six steps of the scientific method? - ANSWERSRecognize 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? - ANSWERSAnalyze the data
What step of the scientific method is deductive reasoning? - ANSWERSTest the
hypothesis
What are the four parts of the fire tetrahedron? - ANSWERSFuel (reducing agent)
Heat
Oxidizing agent
Uninhibited chemical chain reaction
What kind of reaction absorbs energy, an endothermic or an exothermic reaction? -
ANSWERSEndothermic
What is heat transfer by direct contact called? - ANSWERSConduction
What is heat transfer by gas flow / air movement called? - ANSWERSConvection
What is heat transfer by microwave energy called? - ANSWERSRadiation
What is a fuel controlled fire? - ANSWERSA fire that is limited by the amount of
combustibles.
What is a ventilation controlled fire? - ANSWERSA fire that is limited by the amount of
oxygen.
What are the stages of fire growth? - ANSWERSIgnition
Growth
Flashover
Fully Developed
Decay
,What is a flashover? - ANSWERSThe 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? - ANSWERSFlameover or
rollover
What factors influence flashover conditions? - ANSWERSSize of the compartment
Height of ceiling
Ventilation
Amount of fuel
Layout of fuel
Location of fire in the compartment
What are fire patterns? - ANSWERSThe physical manifestation of the affects of fire on
materials.
What are the different types of fire patterns on the walls and ceiling? - ANSWERSPlume
Generated patterns (often V shaped)
Ventilation generated patterns
Hot gas layer patterns (Line of demarcation)
What is spalling? - ANSWERSThe 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? - ANSWERSPyrolized carbonaceous material
What is oxidation? - ANSWERSPhysical change in appearance of a material resulting
from the combination of oxygen.
What is alloying? - ANSWERSMixing two metals heated then cooled to change their
properties. Often melts at a lower temperature.
What is a clean burn? - ANSWERSWhen 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? - ANSWERSElemental carbon produced during incomplete combustion.
What is calcination? - ANSWERSWhen 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? -
ANSWERSBulbs 25 watts or less pull away. Bulbs greater than 25 watts will expand
towards the fire.
,What causes heat shadowing? - ANSWERSAn object blocking the travel of radiated
heat.
What is a dead load? - ANSWERSThe weight of things attached to the building, like
flooring, cloumns, and roof coverings.
What is a live load? - ANSWERSA load that can move, like people, furniture, wind,
water, and snow.
What is compartmentation? - ANSWERSDesign features of a building that limit fire
growth to the room of origin.
What are the five building construction types? - ANSWERSType I - Fire resistant
Type II - Non combustible
Type III - Ordinary
Type IV - Heavy timber
Type V - Wood frame
What is ordinary construction? - ANSWERSExterior walls are masonry and frame is
wood.
What is wood frame construction? - ANSWERSLightweight wood construction, used in
apartments, houses.
What is platform frame construction? - ANSWERSEach floor is a seperate platform.
What is balloon frame construction? - ANSWERSThe wall studs extend from the
foundation to the roof.
What is Ohm's Law? - ANSWERSV=IR
(E = I x R)
What is voltage? - ANSWERSPressure
What is current? - ANSWERSFlow
What is resistance? - ANSWERSFriction, opposition to the flow
What is an overload? - ANSWERSPower needs exceed the circuit's capacity.
Alternating Current VS Direct Current - ANSWERSAlternating current - the electrons
flow out from the source and then back to it, alternating directions.
Direct current - electrons flow one way.
Single Phase service - ANSWERSResidential. Three conductors: Two insulated
conductors at 120 V each, and a bare ground wire.
, Three phase system - ANSWERSCommercial. Four conductors: Three insulated
conductors (480, 240, or 208 V), and a bare ground wire.
What is the difference between grounding and bonding? - ANSWERSGrounding
connects the system to the earth (ground). Bonding connects to systems together so
the charge stays the same between them.
What is overcurrent protection? - ANSWERSA 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? - ANSWERSHot - black or red
Neutral - gray or white
Ground - bare or green
What are some methods of electrical heat production? - ANSWERSResistance heating
Short circuit
Ground fault
Parting Arc
Excessive current
What is the difference between and arc and a spark? - ANSWERSSparks are thrown
metal particles
Arcs are brief discharges of electricity
What is arc tracking? - ANSWERSArc following salts, dusts, or liquids along a path.
What is arc mapping? - ANSWERSMapping out of electrical damage in a circuit.
What is static electricity? - ANSWERSA stationary charge caused by movement of one
object against another. Lighting is a static disharge.
What are the five conditions nessecery for Static Arc Ignition? - ANSWERSA Means of
static generation
A means of accumulating and maintaining the charge
A static discharge with sufficient energy
A fuel source
Coexistence of the arc and fuel source
Name two fuel gasses: - ANSWERSLP (liquid petroleum)
Natural gas
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