JATC 1A UPDATED ACTUAL Questions and CORRECT Answers
Abandon Means leave equipment where it is and get out of the structure immediately.
Withdraw Means grab the equipment and exit the structure to reform strategy. Abandon is a
term used for emergency exit whereas withdraw is usually a change in strategy
causing the exit.
-Wye is an appliance that give the ability to connect 2 1 ¾ hoses to a 2 1/2. It is
commonly used for the drop the wye evolution to have hose reach an upper floor
without having to lay hose all the way up the stairs and along the building. It is
also can be used for the valve to turn flow on or off.
-Adapter hose is used to connect the same size hose that have mismatched threading or lack of
thread. This encompasses double male or double female fittings as well as
threaded to storz.
-Siamese valve have 2 inlets and one output. We mostly carry a Siamese with two 1 ¾ to combine
into a 2 ½ output. These can help overcome friction loss when LDH is not available
or practical.
, -Gate valve controls flow between sections of hose or on a hydrant (2 ½ connection) . It is
used on hydrants to allow for another connection to be made without having to
shut down the hydrant. It can also be used to variably reduce flow.
-Appliance Any piece of hardware used in conjunction with fire hose to control the flow or
change the pathway is an _ _. Some frequently used appliances include valves,
fittings, and intake strainers.
-Clapper valve are one way valves used to prevent backflow. These are common in appliances
with multiple intakes (Siamese).
-Reducer connects a smaller hose to a larger hose. This is useful in cases where you need
higher pressure farther from the pump. By dropping the width of the hose it in
turn adds pressure to the water flow.
-Ball valve can quickly open and close while still minimizing friction loss when in the open
position.
Backdraft Heat and product of combustion accumulated inside a compartment depleting
availability oxygen, then oxygen is reintroduced into the compartment causing
rapid combustion.
Flashover rapid transition from the growth stage to the fully developed stage
Smoke Explosion Form of fire gas ignition: the ignition of accumulated flammable products of
combustion and air that are within their familable range.
Rollover A condition where the unburned fire gases that have accumulated at the top of a
compartment ignite and flames propagate through the hot-gas layer or across the
ceiling.
Abandon Means leave equipment where it is and get out of the structure immediately.
Withdraw Means grab the equipment and exit the structure to reform strategy. Abandon is a
term used for emergency exit whereas withdraw is usually a change in strategy
causing the exit.
-Wye is an appliance that give the ability to connect 2 1 ¾ hoses to a 2 1/2. It is
commonly used for the drop the wye evolution to have hose reach an upper floor
without having to lay hose all the way up the stairs and along the building. It is
also can be used for the valve to turn flow on or off.
-Adapter hose is used to connect the same size hose that have mismatched threading or lack of
thread. This encompasses double male or double female fittings as well as
threaded to storz.
-Siamese valve have 2 inlets and one output. We mostly carry a Siamese with two 1 ¾ to combine
into a 2 ½ output. These can help overcome friction loss when LDH is not available
or practical.
, -Gate valve controls flow between sections of hose or on a hydrant (2 ½ connection) . It is
used on hydrants to allow for another connection to be made without having to
shut down the hydrant. It can also be used to variably reduce flow.
-Appliance Any piece of hardware used in conjunction with fire hose to control the flow or
change the pathway is an _ _. Some frequently used appliances include valves,
fittings, and intake strainers.
-Clapper valve are one way valves used to prevent backflow. These are common in appliances
with multiple intakes (Siamese).
-Reducer connects a smaller hose to a larger hose. This is useful in cases where you need
higher pressure farther from the pump. By dropping the width of the hose it in
turn adds pressure to the water flow.
-Ball valve can quickly open and close while still minimizing friction loss when in the open
position.
Backdraft Heat and product of combustion accumulated inside a compartment depleting
availability oxygen, then oxygen is reintroduced into the compartment causing
rapid combustion.
Flashover rapid transition from the growth stage to the fully developed stage
Smoke Explosion Form of fire gas ignition: the ignition of accumulated flammable products of
combustion and air that are within their familable range.
Rollover A condition where the unburned fire gases that have accumulated at the top of a
compartment ignite and flames propagate through the hot-gas layer or across the
ceiling.
