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SKCFTC JATC 1A STUDY QUESTIONS
SKCFTC JATC 1A STUDY QUESTIONS
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SKCFTC JATC 1A STUDY QUESTIONSBackdraft - Answers- Introduction of oxygen into a compartment of low oxygen, high
heat, smoldering fire, and high fuel vapor concentrations can yield a fire of explosive
force called a Backdraft.
Flashover - Answers- Flashover is the transition between the growth and fully
developed fire stages characterized by rapidly changing conditions in the compartment
from burning of materials first ignited to involvement of all the exposed combustible
surfaces in the compartment.
Smoke Explosion - Answers- Form of fire gas ignition; the ignition of accumulated
flammable products of combustion and air that are within their flammable range.
Rollover - Answers- A condition where the un-burned fire gases that have accumulated
at the top of a compartment ignite and flames propagate through the hot-gas layer or
across the ceiling
Dead Load - Answers- the weight of the building itself and any equipment permanently
attached or built in.
Live Loads - Answers- Live Loads are any loads other than dead loads, they are
indeterminate and estimated based on the projected use of the building and such
variables as snow, wind, or rain.
Impact loads - Answers- Impact loads are loads which are delivered in a short time. A
load which the structure might resist, if delivered as a static load over time, may cause
collapse if delivered as an impact load.
Special considerations to firefighting that come with construction using steel beams and
members. - Answers- When steel is heated it elongates and can actually push out load-
bearing walls and cause collapse. A 50 foot beam may elongate by as much as 4 inches
when heated to about 1000 degrees F. If the steel is restrained from movement at the
ends, it buckles and fails somewhere in the middle.
Describe balloon frame construction - Answers- A construction method using long
continuous studs that run from the sill plate (located on the foundation) to the roof eave
line. All intermediate floor structures are attached to the studs. Requires the use of long
lumber and generally lacks any type of fire stopping within the wall cavities.
The studs run 2 or more stories high. Fire can spread through all the interconnected
spaces from the cellar to the attic and across the ceiling.
Before emergency incidents, fire departments should take what steps to protect
firefighters from the hazards associated with trusses? - Answers- • Conduct pre-
incident planning and inspections to identify structures that contain truss construction
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