WorksheetsChapter 13 - Ventilation
Total questions: 25
Worksheet time: 13mins
What are Negative-Pressure fans called?
PPV Fans
Smoke Ejectors
Blowers
Fans
What type of ventilation occurs when fans are used to force air into a space to displace smoke?
Positive-Pressure Ventilation
Smoke Ejectors
Negative-Pressure Fans
Blowers
What cut works well on metal roofs because it prevents the decking from rolling away?
Kerf Cut
Rectangular Cut
Triangular Cut
Trench Cut
Where should the ventilation opening NEVER be made?
On the Leeward side
At the top of the roof
Directly above the fire
Between the Firefighter and the escape route
What is the main problem with using doorways as ventilation openings?
It compromises Firefighter entry and exit
It obstructs the flow of air
It produces high volume air flow
It restricts the flow of the air flow
What type of ventilation uses large fans and hydraulic ventilation?
Natural Ventilation
Positive-Pressure Ventilation
Mechanical Ventilation
Negative-Pressure Ventilation
What cut can create a large opening quickly and is particularly suitable for a flat or sloping roof with plywood decking?
Kerf Cut
Rectangular Cut
Triangular Cut
Trench Cut
What ventilation can Firefighters use when they need a quick or immediate ventilation?
Natural Ventilation
Mechanical Ventilation
Positive-Pressure Ventilation
Negative-Pressure Ventilation
What is a wall to wall, defensive vertical ventilation tactic that can be used to stop the progress of a large fire?
Kerf Cut
Rectangular Cut
Triangular Cut
Trench Cut
What do some roofs, especially truss roofs do when they are about to collapse?
Will not give a warning
Will give a warning
Will stay strong
Will show signs of collapse
What are the three major roof components?
A Support Structure
Roof Decking
Roof Covering
All of the above
What does a fire around the vents, melting snow and evaporating or steaming water mean?
Fire is starting to burn in the attic
Imminent Collapse
Roof is Stable
Nothing is wrong
In a heated high-rise building, on a cold day there will be what?
A Strong Downdraft
A strong updraft
Laterally Smoke Movement
No effect at all
As a fire progresses and grows, it produces smoke, heat, and toxic gases. What are these called?
Products of Smoke
Products of Smoldering
Products of Combustion
Products of Steam
What is a free standing wall that extends above the normal roof line on a flat roof called?
Parapet wall
Fire Wall
Partition Wall
Party Wall
Hydraulic ventilation is most useful for clearing smoke and heat out of a room because it creates what?
Low-Pressure in front of the nozzle
Creates water damage
High-Pressure behind the nozzle
Low-Pressure behind the nozzle
What fans are powered by internal combustion engines and can increase carbon monoxide levels if they run for a significant period of time after the fire is extinguished?
Positive-Pressure Fans
Negative-Pressure Fans
Smoke Ejectors
Blowers
When breaking window glass for ventilation purposes, where should the Firefighter's hands be located?
Below the point of contact
At the highest point on the tool
Where ever is most comfortable
Above or to the side of the window
If it is safe to do so, where should ventilation operations be performed?
In front of the fire
Beside the fire
As close to the fire as possible
At the other end of the structure
When is Horizontal Ventilation most effective?
When the opening goes to another space within the structure
When the opening goes into the stairwell
When the opening goes directly into the room of involvement
When the opening goes past the attack team
What are the two main types of ventilation used by Firefighters?
Vertical & Mechanical
Horizontal & Mechanical
Vertical & Hydraulic
Vertical & Horizontal
How far apart should the two parallel cuts be made when performing a Trench Cut?
1 to 3 feet
2 to 4 feet
3 to 5 feet
4 to 6 feet
What is the most important concern to Firefighters when using Positive-Pressure Ventilation?
The fire dying down
The fire spreading
Smoke build-up in the room
The fan running out of gas
A Backdraft occurs when smoke, heat, and gases accumulate with a rich supply or partially burned fuels and are suddenly introduced to what?
a flame
Increased temperatures
Clean air
Open fuels
What happens when one connection of a truss roof fails?
The truss relies on the next truss to help support the load
The truss has no effect to it
The truss continues to support the load
The truss loses its ability to support the load
