Chapter 12: Horizontal Ventilation Flashcards
What is the most frequently use form of tactical ventilation?
Horizontal ventilation
Openings in wooden or metal rollup doors are most often made with__________.
Rotary saws
Fire departments also use flexible ducting that is up to__inches in diameter, and is made of smooth, translucent plastic.
24 inches
Flexible ducking allows for smoke to be expelled from affecting apartment without spreading the smoke throughout the rest of the_________.
Structure
Fix windows are often find by__________or casement windows or are stacked with awning or a hopper windows that can be opened.
Double hung
By using______, two or more smoky doctors can be couple to ventilate smoke from basement, attic’s, suspended ceilings, and other confined spaces.
Flexible ducting
Windows that are usually open and close using a small hand crank built into the frame?
Casement windows
Windows that have two more sashes, one of which is fixed in the other or others are movable.
Horizontal sliding windows
These windows, also known as back to the windows, maybe hinged at the top or bottom and may swing in word or outward.
Projected windows
Energy efficient windows are commonly referred to as?
Thermal windows
Regardless of its design or location, a door open for tactical ventilation purposes should be?
Blocked open, but not removed
The most common types of exterior doors use for tactical ventilation purposes are?
- swinging doors
- sliding doors
- overhead type doors
- Roll up doors
Especially constructed, tested, and approved fire rated door assembly designed and installed to prevent fire spread by automatically closing in covering a doorway in a firewall during a fire to block the spread of fire through the door opening.
Fire door
From the standpoint of horizontal ventilation, the most important types of sliding doors are?
Exterior sliding doors and interior sliding fire doors
The most common types of walls that firefighters may have to breach for horizontal ventilation are?
- Stem walls
- interior firewalls
- Exterior walls
The_______, located between the foundation footing in the first floor, make Stan well above the ground if the building occupies a sloping site.
Stem wall
Walls that are rated assemblies designed to reduce the likelihood of horizontal fire spread by compartmentalizing a building with fire resistive separations.
Firewalls
Firewalls must extend the entire width of the building and, in most cases extend up to and above combustible_____.
Roofs
Walls that protect the building and its contents from the elements and supports its roof structure.
Exterior walls
Exterior masonry walls usually range from_____inches or more in thickness, depending upon the material used.
8 to 12 inches
What does the acronym EIFS mean?
Exterior insulation and the finishing system
The EIFS veneer may be as much as___foot thick.
One
Important factors that must be considered an a plan for horizontal ventilation include
- location of the fire
- Wind direction and speed
- Location of ventilation openings
Unprotected side the direction from which the wind is blowing.
Windward
Protected side the direction opposite from which the wind is blowing.
Leeward
When windows are open for tactical ventilation, the exit opening should be ______as large as the inlet opening.In other words, open the windows on the Leeward side fully in those on the Windward side about halfway.
Twice
When breaking a window a fire fighter should have full protective clothing including hand and I protection, and should be?
Upwind and higher than the window
Smoke ejectors are usually set up in the opening on the______side of the building.
Leeward
4PPV, blowers are set up about_feet outside the point of entry into the building so the cone of air they create completely covers the inlet opening.
6 feet
Compared with mechanical smoke ejecta, fog streams are capable of removing___to____times more smoke,Depending on the type and size of the nozzle, the angle of the spray pattern, and the location of the nozzle in relation to the ventelation opening.
Two to four times
What are the disadvantages to hydraulic ventilation?
- An increase in the amount of water damage within the structure
- there will be a drain on available water supply
- In sub freezing temperatures additional ice may form
- The nozzle operator must remain in a hostile environment
- The operation may have to be interrupted each time the operator runs out of breathing air
If I wind speeds are present, and the vertical ventilation is impractical or impossible, delaying ventilation until after the fire is control may be the only_________.
Available option
