TCFP Fire Investigator Questions with
Complete Solutions
What causes heat shadowing? An object blocking the travel of radiated heat.
What is a dead load? The weight of things attached to the building, like flooring, cloumns,
and roof coverings.
What is a live load? A load that can move, like people, furniture, wind, water, and snow.
What is compartmentation? Design features of a building that limit fire growth to the
room of origin.
What are the five building construction types? Type I - Fire resistant
Type II - Non combustible
Type III - Ordinary
Type IV - Heavy timber
Type V - Wood frame
,What is ordinary construction? Exterior walls are masonry and frame is wood.
What is wood frame construction? Lightweight wood construction, used in apartments,
houses.
What is platform frame construction? Each floor is a seperate platform.
What is balloon frame construction? The wall studs extend from the foundation to the
roof.
What is Ohm's Law? V=IR
(E = I x R)
What is voltage? Pressure
What is current? Flow
,What is resistance? Friction, opposition to the flow
What is an overload? Power needs exceed the circuit's capacity.
Alternating Current VS Direct Current 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 Residential. Three conductors: Two insulated conductors at 120 V
each, and a bare ground wire.
Three phase system Commercial. Four conductors: Three insulated conductors (480, 240,
or 208 V), and a bare ground wire.
What is the difference between grounding and bonding? 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? 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? Hot - black or red
Neutral - gray or white
Ground - bare or green
What are some methods of electrical heat production? Resistance heating
Short circuit
Ground fault
Parting Arc
Excessive current
Complete Solutions
What causes heat shadowing? An object blocking the travel of radiated heat.
What is a dead load? The weight of things attached to the building, like flooring, cloumns,
and roof coverings.
What is a live load? A load that can move, like people, furniture, wind, water, and snow.
What is compartmentation? Design features of a building that limit fire growth to the
room of origin.
What are the five building construction types? Type I - Fire resistant
Type II - Non combustible
Type III - Ordinary
Type IV - Heavy timber
Type V - Wood frame
,What is ordinary construction? Exterior walls are masonry and frame is wood.
What is wood frame construction? Lightweight wood construction, used in apartments,
houses.
What is platform frame construction? Each floor is a seperate platform.
What is balloon frame construction? The wall studs extend from the foundation to the
roof.
What is Ohm's Law? V=IR
(E = I x R)
What is voltage? Pressure
What is current? Flow
,What is resistance? Friction, opposition to the flow
What is an overload? Power needs exceed the circuit's capacity.
Alternating Current VS Direct Current 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 Residential. Three conductors: Two insulated conductors at 120 V
each, and a bare ground wire.
Three phase system Commercial. Four conductors: Three insulated conductors (480, 240,
or 208 V), and a bare ground wire.
What is the difference between grounding and bonding? 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? 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? Hot - black or red
Neutral - gray or white
Ground - bare or green
What are some methods of electrical heat production? Resistance heating
Short circuit
Ground fault
Parting Arc
Excessive current
