17- 01 Ventilation Flashcards Preview

Sec. 4 Standard Operating Guidelines > 17- 01 Ventilation > Flashcards

Flashcards in 17- 01 Ventilation Deck (19)
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1
Q

What is considered a mainstay of fire control?

A

controlling the air

2
Q

What is the limiting factor in the involved fuel’s heat release rate?

A

available air

3
Q

How can fire control be gained and maintained? (2)

A
  1. limiting ventilation

2. controlling flowpaths

4
Q

What may change fire behaviour drastically in regards to ventilation? (3)

A
  1. exiting occupants
  2. changes in structural integrity
  3. FF ops
5
Q

What is flowpath?

A

movement of heat/ smoke from higher pressure- lower pressure

6
Q

What is fuel limited?

A

the heat- release rate (amount of energy released over time) is limited primarily by chemical/ physical characteristics of available fuels

7
Q

What are key indicators of fuel limited fires? (4)

A
  1. incipient/ early growth fire
  2. high neutral plane (smoke layer)
  3. better visibility
  4. relatively low temperatures
8
Q

What is hydraulic ventilation?

A

using water flow to draw air out of structure

9
Q

What are examples of mechanical ventilation? (2)

A
  1. PPV

2. building systems

10
Q

What are different types of ventilation? (3)

A
  1. hydraulic
  2. mechanical
  3. natural
11
Q

What are examples of natural ventilation? (3)

A
  1. wind
  2. opening windows
  3. creating openings at highest point of structure
12
Q

What is tactical ventilation? (6)

A

planned, systematic, coordinated removal of heat, smoke, fire gases and replacement with cooler fresh air

13
Q

What is vent limited?

A

a fire in which heat release rate and fire growth are regulated by available O2 w/i space

14
Q

What are indicators of vent limited fire? (7)

A
  1. fire is beyond incipient stage
  2. mid-low neautral plane
  3. poor visibility
  4. flames exiting windows/ doors
  5. air being drawn into fire when door opened
  6. increased temps
  7. all common backdraft indicators
15
Q

What is ventilation profile?

A

ventilation points showing flow paths of heat and smoke out of structure as well as any air movement into structure

16
Q

What should be considered when determining a structures ventilation profile? (9)

A
  1. existing/ potential flow-paths
  2. location and stage of fire
  3. fuel or vent limited
  4. wind direction
  5. smoke conditions (volume, velocity, density and colour)
  6. exposures
  7. rescue or suppression
  8. building layout/ construction
  9. integrated ventilation systems
17
Q

What considerations should be made in regards to doors and ventilation? (3)

A
  1. front door consdered as part of overall ventilation strategy
  2. closing door to structure will help control heat- release rate of fire
  3. consider door control tactics during hose advancement
18
Q

What are considerations for choosing tactical plan for ventilation? (4)

A
  1. tactics complement incident action plan
  2. location of interior operations personnel
  3. occupant location
  4. how tactics may affect flow-path, fire behaviour, operational time frames
19
Q

What SOGs can be considered extensions of this SOG? (3)

A
  1. SOG 17-02 PPV
  2. SOG 17-03 PPA
  3. SOG 17-04 High Rise Ventilation

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