JATC 1A EXAM QUESTIONS WITH
COMPLETE SOLUTIONS
Abandon - Correct Answers -Means leave equipment where it is and get out of the
structure immediately.
Withdraw - Correct Answers -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.
-Siamese valve - Correct Answers -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 - Correct Answers -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 - Correct Answers -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.
-Wye - Correct Answers -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 - Correct Answers -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.
-Clapper valve - Correct Answers -are one way valves used to prevent backflow. These
are common in appliances with multiple intakes (Siamese).
-Reducer - Correct Answers -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 - Correct Answers -can quickly open and close while still minimizing friction
loss when in the open position.
Backdraft - Correct Answers -Heat and product of combustion accumulated inside a
compartment depleting availability oxygen, then oxygen is reintroduced into the
compartment causing rapid combustion.
Flashover - Correct Answers -rapid transition from the growth stage to the fully
developed stage
Smoke Explosion - Correct Answers -Form of fire gas ignition: the ignition of
accumulated flammable products of combustion and air that are within their familable
range.
Rollover - Correct Answers -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.
Dead loads - Correct Answers -weight of the structure, structural members, building
components and any other features permanently attached to the building that is
constant and immobile
Live Loads - Correct Answers -items within a building that are movable but are included
as a permanent part of the structure; merchandise, stock, furnishings, occupants,
firefighter, and the water used for the fire suppression are examples of the live loads (2)
force placed upon a structure by the addition of people, objects or weather.
Impact loads - Correct Answers -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
Describe the special considerations to firefighting that come with construction using
steel beams and members - Correct Answers -The main considerations firefighters
need to have when working in a building with known steel beams as its support
members is, once steel is heated to 1,000 degrees it will start to elongate, ( a 100 foot
steel beam can elongate upto 9 inches). This has pushed out/ Collapsed many building
walls resulting in killing/trapping many firefighters throughout history.
List 9 common building materials - Correct Answers -Wood, Metal, Masonry brick /
stone, Gypsum- drywall, Lath and plaster, Plastic Composite, Glass, Concrete,
Describe balloon frame construction - Correct Answers -is a technique of building a
house separate from the wall and raising a wall into place. This is dangerous for
multiple reasons. The entire wall could detach and fall as one large piece. Balloon frame
construction also does not have the same layers of protection in the wall cavity. There
COMPLETE SOLUTIONS
Abandon - Correct Answers -Means leave equipment where it is and get out of the
structure immediately.
Withdraw - Correct Answers -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.
-Siamese valve - Correct Answers -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 - Correct Answers -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 - Correct Answers -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.
-Wye - Correct Answers -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 - Correct Answers -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.
-Clapper valve - Correct Answers -are one way valves used to prevent backflow. These
are common in appliances with multiple intakes (Siamese).
-Reducer - Correct Answers -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 - Correct Answers -can quickly open and close while still minimizing friction
loss when in the open position.
Backdraft - Correct Answers -Heat and product of combustion accumulated inside a
compartment depleting availability oxygen, then oxygen is reintroduced into the
compartment causing rapid combustion.
Flashover - Correct Answers -rapid transition from the growth stage to the fully
developed stage
Smoke Explosion - Correct Answers -Form of fire gas ignition: the ignition of
accumulated flammable products of combustion and air that are within their familable
range.
Rollover - Correct Answers -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.
Dead loads - Correct Answers -weight of the structure, structural members, building
components and any other features permanently attached to the building that is
constant and immobile
Live Loads - Correct Answers -items within a building that are movable but are included
as a permanent part of the structure; merchandise, stock, furnishings, occupants,
firefighter, and the water used for the fire suppression are examples of the live loads (2)
force placed upon a structure by the addition of people, objects or weather.
Impact loads - Correct Answers -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
Describe the special considerations to firefighting that come with construction using
steel beams and members - Correct Answers -The main considerations firefighters
need to have when working in a building with known steel beams as its support
members is, once steel is heated to 1,000 degrees it will start to elongate, ( a 100 foot
steel beam can elongate upto 9 inches). This has pushed out/ Collapsed many building
walls resulting in killing/trapping many firefighters throughout history.
List 9 common building materials - Correct Answers -Wood, Metal, Masonry brick /
stone, Gypsum- drywall, Lath and plaster, Plastic Composite, Glass, Concrete,
Describe balloon frame construction - Correct Answers -is a technique of building a
house separate from the wall and raising a wall into place. This is dangerous for
multiple reasons. The entire wall could detach and fall as one large piece. Balloon frame
construction also does not have the same layers of protection in the wall cavity. There
