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JATC 1B CONT. QUESTIONS AND ANSWERS
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JATC 1B CONT. QUESTIONS AND ANSWERS
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JATC 1B CONT. QUESTIONS AND ANSWERSDefine Abandon - Answers- An immediate and rapid exit from the hazadous zone or
structure. This may require sacrificing or discarding equipment in order to facilitate the
immediate and rapid exit.
Define Withdraw - Answers- This is a planned or orderly withdrawal/removal of
firefighters from the hazardous zone or structure. Firefighters generally should exit as a
company or team with all hose, tools and equipment.
What tactical objectives are expected for an interior fire attack - Answers- Direct Attack,
Check for extension, primary search of the fire room and hydraulic ventilation
5 limiting factors of a fire stream reach - Answers- gravity, water velocity, fire stream
pattern, water droplet friction with air, and wind.
define WYE - Answers- Wye is a hose appliance with a single female intake and two
male outlets. Wyes with gates are called gated wyes. Most common is 2 1/2" to 1 3/4"
outlets
define Adapter - Answers- an adapter is a fitting use for connecting hose couplings of
the same inside diameter but that have different thread types. most common are double
male and double females.
define Siamese - Answers- an adapter that looks similar to a wye, but has two female
inlets and a single male outlet. They are used to provide larger quantities of water at
lower friction loss
define gate valve - Answers- controls the flow of water by a baffle that is moved by a
handle and screw arrangement. The baffle moves up and down as the valve is rotated.
commonly used to control the water flow from a hydrant
define appliance - Answers- an appliance is any piece of hardware used in conjunction
with fire hose for the purpose of delivering water
define clapper valve - Answers- a clapper valve is used in Siamese appliances and
pump piping to allow water to flow in only one direction. The clapper is a flat disc that is
hinged at the top or one side and that swings in a door-like manner. They prevent water
from flowing into unused ports.
define reducer - Answers- a reducer is an adapter used to attach a smaller hose to a
larger hose. The larger threads being on the female end and the smaller threads on the
male end.
, define ball valve - Answers- controls the flow of water in pumper discharges and gated
wyes. Ball valves are open when the handle is in line with the hose and closed when it
is at a right angle to the hose.
define balloon frame construction - Answers- common method used for constructing
wood fram residential building between 1800s to mid 1950s. It consists of long
continuous studs that run from the foundation to the roof eave line. This creates wall
cavities between the studs that are open from the ground floor to the attic. Lacking fire
blocks a fire in the basement can extent to the attic through this channel.
Type 1 construction - Answers- also known as fire-restive construction. Consists of
mainly reinforced concrete with structural members that are protected by blown-on
insulation or automatic sprinklers.
Type 2 construction - Answers- also known as noncombustible construction made of
the same materials of type 1 except the structural components lack the insulation or
other protection of type 1 construction
Type 3 construction - Answers- known as ordinary construction. The exterior walls and
structural members are made of noncombustible materials such as concrete blocks or
clay blocks.
Type 4 construction - Answers- Known as Heavy timber construction, requires that
exterior and interior walls and their interior walls and their associated structural
members be made on noncombustible or limited combustion materials
Type 5 construction - Answers- Know as wood frame construction. the exterior walls,
bearing walls, floors, roofs and supports are made completely or partially of wood.
commonly used to construct the typical single family residence.
List 9 common building materials - Answers- wood, masonry, metals, reinforced
concrete, gypsum, lath and plaster, glass/fiberglass, plastic, composite materials
Steel exposed to high temperatures, at or over 1000 degrees will - Answers- lengthen,
or elongate and can buckle or fail is restrained from movement at the ends
Define Backdraft - Answers- an instantaneous explosion of superheated gases that
occur when oxygen is introduced into an oxygen-depleted confined space. This
combustion that was stalled resumes in an explosive manner when oxygen is
reintroduced.
Define Flashover - Answers- Flashover is a stage of a fire at which all objects within a
compartment have been heated to their ignition temperature and flames breakout
almost at once over the surface of all objects in the space. Flashover is the rapid
transition between the growth and fully developed fire stages but is not a specific event
such as ignition.
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