Ch 9 Ventilation Flashcards
What does ventilation mean? pg 230
As the process of removing the toxic products of combustion and replacing them with fresh air.
What are the two main reasons for performing ventilation? Pg 230
Venting for fire and venting for life
The venting of windows is called what? Pg 234
Horizontal ventilation
Ventilation of roof and topside is called what? Pg 234
Vertical ventilation
What is considered mechanical ventilation? Pg 234
Opening windows
What is considered natural ventilation? Pg 240
Opening doors, windows, or skylight
What is considered mechanical ventilation? Pg 240
Involves hose lines, portable fans or building ventilation systems.
How do you create a Venturi effect from a window using a nozzle with a fog stream? Pg 240
30-35 degree pattern with a nozzle distance to window of 6-8 feet optimum
What does churning mean? Pg 241
Results in some air from the outside being drawn into the building around the side of the fan, only to be blown out again through the fan
positive pressure ventilation fan is set up how many feet from the desired opening? Pg 242
8-12 feet away
What is a mushroom effect? Pg 244
When restrained from rising, it spreads out horizontally and then starts to bank down.
What is considered total ventilation? Pg 247
Includes venting all windows and other horizontal openings as well as roof ventilation.
What are the two old style flat roofs? Pg 247
Standard flat roof and inverted roof
What is considered a standard flat roof? Pg 247
Where the main roof joist are right at the roof level and with the roof boards nailed directly to the joist.
What is a inverted roof? Pg 247
Where the roof boards are nailed to a framework of 2x4s raised several feet above the main roof joist.
What is a kerf cut? Pg 250
Triangular opening or a short narrow slit that is only the width of the blade or chain
What are insulspan panels? Pg 256
Are made of styrofoam insulation sandwiched between two layers of oriented strand board, creating a very effective insulating material.
What is a trench cut? Pg 257
Is a specialized cut used to create a firebreak along the surface of the roof
One hand line for every how many feet of trench should be positioned on the roof on the safe side of the trench? Pg 261
15-20 feet
Never allow a spinning blade or chain to get more than how many inches above the roof? Pg 262
6 inches
What should be your guide when deciding to break or open a window for ventilation from the inside? p. 234
Heat
What should be vented first when you encounter a flat roof building? p. 249
Stairs and windows
From which location must firefighters enter the building when PPV is being used? p. 243
Location of the fan
How must the fire be reached if it has entered the second cockloft when a rain roof is present? p. 256
From above
Which apartment should be forced when creating an area of refuge during a fire incident? p. 233
One on the same side of the hall as the fire apartment
What material is sandwiched in the center of the Insulpan panels? p. 256
Styrofoam
What material is sandwiched in the center of the Insulpan panels? p. 256
Styrofoam
What is probably the greatest danger to firefighters engaged in roof ventilation? p. 261
Fellow firefighters
Who serves as the eyes and ears of the Incident Commander? p. 263
Roof team
How much of the window opening does “textbook ventilation” of double hung windows create during ventilation? p. 231
One-half
What was used to create the pitch of the inverted roof? p. 254
Upright posts
What is the minimum size team that is needed when you encounter a working fire on the top floor of any
large-area flat-roof building? p. 248
Four
What must be done to make operating in a building with fire in the void spaces more doable? p. 247
Total ventilation
At what angle do the 2X4s in the inverted roof join the top plate? p. 255
90
What is the minimum width that the trench cut should be made? p. 259
3 feet
How are the rows of uprights typically spaced on the inverted roof? p. 254
4 ft on center
What is the best tool to use when breaching the glazed windows? p. 238
Circular saw
How should the flat roof NOT be accessed? p. 249
Interior stairs
Generally, what must be coupled with horizontal ventilation for a life hazard?
p. 234
Rescue effort
What can be used to determine the location of pipe chases in a structure?
p. 246
Soil pipes on the roof
What is most efficient way to prevent the horizontal spread of heated gas during a fire? p. 244
Vertical ventilation
What is the key factor when distinguishing between venting
for life and venting for fire? p. 231
Timing of the ventilation
Which weather condition is particularly important to consider when deciding between horizontal and vertical ventilation? p. 238
Wind
What maximum size should each area be cut when making an 8X8 foot hole in the roof for ventilation? p. 251
4X4 foot
What is best suited for cutting the Insulpan panels? p. 257
Chainsaw
What size hole should result when creating an inspection hole in the roof? p. 250
8- to 10-inch
