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Chapter 15 Ventilation - Fire Fighter
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105
Other
Undergraduate 1
02/24/2014

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Term
When heat hits a ceiling and begins to spread out and bank down horizontally.
Definition
Mushrooming
Term
Most notably produced gases in a fire.
Definition
Carbon Monoxide and Cyanide
Term
The flow of heated gases produced by the fire.
Definition
Convection
Term
How do you eliminate potential backdraft?
Definition
Placing ventilation as high as possible within the building.
Term
Where should attack crews charge their hoseline?
Definition
Outside the building
Term
When should the ventilation crew ventilate?
Definition
When the attack crew is ready to advance the attack line.
Term
How do you create a positive pressure zone?
Definition
Open windows and doors on the upwind side of the house.
Term
On a cold day what will happen to heat in a high rise?
Definition
there will be a strong updraft
Term
Fire Resistive Construction is made out of what?
Definition
non combustible and limited combustible materials
Term
When fire spreads from floor to floor by a window.
Definition
Leap-frogging (auto-exposure)
Term
Limited combustible or non combustible exterior walls, with wood insides.
Definition
Ordinary construction
Term
An open area inbetween the top floor and the roof.
Definition
Cockloft
Term
3 Tactical priorities for ventilation
Definition
1.Life Safety
2.Fire Containment
3.Property Conservation
Term
How does fire travel?
Definition
Toward a ventilation opening, following the flow of heat and smoke.
Term
thin, light-colored smoke moving lazily out of a building usually indicates...
Definition
a small fire involving ordinary combustibles.
Term
Thick, dark, grey smoke pushing out of a building suggests what...
Definition
an intense fire
Term
What produces a large amount of black, rolling smoke that rises in a column?
Definition
a fire involving petroleum products
Term
limited smoke can indicate...
Definition
that there is a lack of ventilation
Term
When smoke hangs low to the ground on a cool damp day.
Definition
Smoke inversion
Term
How does smoke move when it is really hot?
Definition
Fast
Term
products of combustion that must be removed from the building
Definition
Contaminated atmosphere
Term
Outside air that replaces toxic combustion products in a building
Definition
Clean air
Term
Horizontal vent. is commonly used where?
Definition
Residential Fires, room-and-contents fires, and fires that can be controlled quickly by an attack team
Term
When is H.V. most effective?
Definition
When it goes directly into the room or space with the fire.
Term
H.V. tactics include what?
Definition
Natural and Mechanical methods
Term
What is an easy way to protect rooms from smoke?
Definition
close the door
Term
depends ont he convection currents, wind, and other natural air movements to ventilate.
Definition
Natural Ventilation
Term
Nat.V. can only be used when?
Definition
natural convection currents or wind are adequate.
Term
Nat.V. is often used when what is needeD?
Definition
quick ventilation
Term
What windows do you open first?
Definition
Downwind side
Term
What uses existing or created openings?
Definition
Natural Ventilation
Term
How do you break glass with a ladder?
Definition
Put the tip into the upper half of the glass.
Term
How long is the ladder for a 2nd floor window?
Definition
16 - 20 ft.
Term
Extension ladders are used to break windows on what floor?
Definition
3rd and up
Term
When breaking a window with a ladder what direction do you want the glass to fall?
Definition
Inside the window.
Term
How do you break a window from a roof?
Definition
Attach a halligan to a rope or chain and toss it over the edge to swing into the window. Or use a pike pole to reach down.
Term
How should you treat the opening of a door?
Definition
As a major act of ventilation
Term
When should you open a door for ventilation?
Definition
When an attack team has a charged hose line and is ready to attack.
Term
What can indicate an under ventilated fire?
Definition
Air sucking into a building when you open the door.
Term
3 methods of Mechanical ventilation.
Definition
NP
PPV
Hydraulic
Term
What kind of ventilation uses ejectors?
Definition
NP
Term
Information about HVAC systems should be obtained when?
Definition
Preincident planning surveys
Term
What size are smoke ejectors usually?
Definition
16 - 24 inches
Term
How can you power smoke ejectors?
Definition
Electricity, gasoline, water pressure.
Term
When is NP generally used?
Definition
After an attack
Term
Can NP be used on a roof?
Definition
Yes
Term
When do you clean ejectors?
Definition
After each use
Term
What reduces the effectiveness of an ejector?
Definition
Churning
Term
What is churning?
Definition
when exhausted air is immediately recirculated through a fan.
Term
What kind of motors do ejectors have?
Definition
Explosion proof
Term
Where can you most effectively place a PPV van?
Definition
3 - 4 feet outside the door
Term
When performed properly PPV can...
Definition
push heat and smoke out of the buidling through an exhaust vent on the opposite side of the building.
Term
PPV doesnt work properly when?
Definition
There are too many openings
Term
When using PPV the entry and exit openings should be what size?
Definition
The same
Term
What happens to the fire the first few minutes that PPV has been introduced?
Definition
It gets hotter
Term
What should you check for before placing down a PPV fan?
Definition
Wind direction
Term
Where can fans be placed when ventilating large structures?
Definition
Side by side or one behind the other
Term
Which type of fan requires the most cleaning after each use?
Definition
NP
Term
What are the disadvantages of PPV?
Definition
Unwanted fire spread
Very noisy
Internal Combustion engines (increased carbon monoxide levels)
Term
On some fans, when tipped down what happens?
Definition
the oil sensor will cause it not to start.
Term
How do you use hydraulic ventilation?
Definition
shoot water from a fog stream or broken steam from a smooth bore out a window or a door.
Term
When is Hydraulic ventilation most effective?
Definition
after the fire is under control
Term
If a roof is made of lightweight truss material how do you ventilate it?
Definition
Use an ariel ladder or basket
Term
How many exits are required when working on a roof?
Definition
2 Exits preferably on opposite sides
Term
Does sounding a roof always work?
Definition
No
Term
2 major components of a roof
Definition
support structure

roof covering
Term
Rigid layer on a roof made of wooden boards, plywood sheets, or metal panels.
Definition
roof decking
Term
If one truss fails does the whole section fail?
Definition
Not always, but it is weakened.
Term
A roof supported by bar joists will do what before it collapses?
Definition
Sag
Term
what kind of roof has a parapet wall?
Definition
Flat roof
Term
What is a parapet wall?
Definition
Walls that extend above the roof.
Term
thin, parallel strips of wood
Definition
Lath
Term
Bowstring trusses are usually constructed of wood and spaced how far apart?
Definition
6 - 20 ft.
Term
4 types of vertical ventilation
Definition
Built in
inspection
Primary(expandable)
Secondary(Defensive)
Term
A slit cut with a power tool into a roof used for examination.
Definition
kerf cut
Term
If you are able to after cutting the roof open what size should the hole in the ceiling be?
Definition
The same size as the roof hole. If not use a pike pole to break out as much as possible.
Term
Which cut is good on a flat or sloping roof with plywood decking?
Definition
Louver Cut
Term
What type of roof works well with a triangular cut?
Definition
Metal Roof decking
Term
What type of roof can you use a peak cut on?
Definition
peaked roofs sheeted with plywood
Term
A cut that creates a large opening ahead of the fire to prevent spread.
Definition
Trench Cut
Term
A cut that is made from one exterior wall across to the other.
Definition
Trench cut
Term
What is another name for Trench Cut?
Definition
Strip cut
Term
Which cut is considered a defensive ventilation tactic?
Definition
Trench Cut
Term
On a metal roof, what indicates the seat of the fire?
Definition
Discoloration and Warping
Term
Which cut prevents metal from rolling away.
Definition
Triangle Cut
Term
PPV is least suitable approach for which method?
Definition
Fire and structural void spaces.
Term
How can the TIC be set to help fire fighters search quickly?
Definition
To distinguish small temperature differences.
Term
What is the major benefit of using a TIC?
Definition
It can "see" the image of a person in conditions of total darkness or through smoke.
Term
Can a TIC tell you which way the fire is spreading?
Definition
Yes
Term
On a helmet mounted TIC where is the image shown?
Definition
In front of the users SCBA face piece
Term
When entering a room how do you determine how many walls it has?
Definition
If there is a parallel wall to the left and right it has 5 walls, if there is only 1 parallel wall it has 4 walls.
Term
When do you use search ropes?
Definition
When it is impossible to search a place using just the walls.

Areas with interconnected rooms

Areas with multiple aisles created by counters or storage racks
Term
How many fire fighters should be at the anchor point of a search rope?
Definition
One
Term
Can you let go of the rope and venture off a couple feet to search?
Definition
Depends on the department
Term
Who came up with the "Oriented Search"? and where is he from?
Definition
Skip Coleman

Toledo, Ohio
Term
What is an Oriented Search?
Definition
When a fire officer stays at the door to monitor the situation while the fire fighters search the room.
Term
who calls for an evacuation of a room when the search crew is performing an Oriented Search?
Definition
Fire Officer
Term
When using the Vent-Entry-Search method, what is vent?
Definition
Opening a window where conditions in a room are tenable.
Term
When using the Vent-Entry-Search method, what is entry?
Definition
Entering the window asap after venting and closing the door to shut off oxygen to the fire.
Term
Because Vent-Entry-Search is dangerous, when should you do it?
Definition
In an emergency situation where saving life is possible.
Term
Why is Vent-Entry-Search such a high risk action?
Definition
It places the fire fighter in between the fire and the ventilation hole.
Term
Who tells the fire fighter its okay to do a Vent-Entry-Search?
Definition
IC
Term
When is a secondary search performed?
Definition
When the fire is under control OR extinguished.
Term
When do fire fighters need a hose line when doing a Secondary search?
Definition
When they are in a burned area.
Term
When should a secondary search start?
Definition
As soon as the fire is under control and sufficient resources are available.
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