Flow path
What is the term for the process of removing smoke, heat, and toxic gases from a building and replacing them with cooler, cleaner, and more oxygen-enriched air?
Ventilation
The interface exists at a vent, such as a doorway or window opening is the
neutral plane
If a roof must be cut to provide a ventilation opening what is the recommended minimum size of the opening?
4x4
What is the term for the weather- resistant surface of a roof
Roof covering
Which type of structure, used in roof supports, is composed of relatively small and lightweight components in a series of triangles?
A truss
Which undesirable effect can occur if windows on the upwind side are opened in a horizontal ventilation situation?
Fire may be forced into unevolved areas of the structure
What is the greatest danger to fire fighters performing vertical ventilation?
Roof collapse
which type of ventilation openings can be used to stop fire spread in long narrow buildings, such as strip malls?
Trench
What are gusset plates?
Component-connecting plates made of wood or lightweight metal
What is the construction feature called in which there are vertical channels in the exterior walls from foundation to attic, allowing rapid, unchecked vertical fire spread?
Balloon frame
what is it called if air is immediately drawn back into the building because of an incomplete sealed smoke ejector?
Recirculation
where does the water come from in hydraulic ventilation?
A standard fire hose line
A kerf cut is a
A cut only as wide as the saw blade used for inspection
Freestanding walls that extend above the normal roofline are called
parapet walls
Which roof type is generally found in commercial structures because it creates large open spans without requiring the use of columns?
Curved
Which type of operation is needed to alleviate flashover condistions?
Transitional fire attack
If the fire is in structural void spaces, positive- pressure ventilation should not be used until crews are in place and _____ is/ are available.
access to the space
Structural supports
The factors to consider when determining when and where to ventilate include the size of the fire, the stage of combustion, the location of the fire in a building, and the:
available ventilation options
Modern wood- frame construction uses a technique that builds one floor at a time and inserts a plate between each floor that acts as a fire stop. What is this technique called?
Platform- frame
What is the phenomenon called in which smoke hangs low to the ground on a cool day with very little wind?
Smoke inversion
When setting a smoke ejector up in a window, in part of the window should it be placed, or does it matter?
in the upper part of the opening
The factors to consider when determining when and where to ventilate include the size of the fire, the stage of combustion, the location of the fire in a building, and the
available ventilation options
What is it called if air immediately drawn back into the building because of an incompletely sealed smoke ejection?
Recirculation
What is caused by temperature differences inside and outside a building?
Stack effect