SOG 17-01 Ventilation

Question 1

SOG 17-01 Ventilation

Definition- Flow path-

Answer 1

the movement of heat and smoke from the higher pressure within the fire area toward the lower-Pressure, generally unless the thermal layering is disturbed, blocked, etc, hot air will travel out on top and cool air will travel in on the bottom

Question 2

SOG 17-01 Ventilation

Definition- Fuel limited- the heat release rate (the amount of energy released over time) of the fire is limited primarily be the chemical and physical characteristics of the available fuels. indicators may include (4)

Answer 2

• an incipient or early growth fire
• high neutral plane (smoke Layer)
• Better visibility
• relatively low temperatures

Question 3

SOG 17-01 Ventilation

Definition- Hydraulic-

Answer 3

using water flow to draw the air out of a structure

Question 4

SOG 17-01 Ventilation

Mechanical Ventilation- using machinery and/or devices to assist in the movement of air, examples may includes (2)

Answer 4

• positive pressure

- Building systems

Question 5

SOG 17-01 Ventilation

Natural ventilation- allowing air to naturally to move without any assistance, examples may include

Answer 5

• Wind
• opening windows
• Creating openings at the highest point of the structure

Question 6

SOG 17-01 Ventilation

Definitions- tactical Ventilation

Answer 6

is planned , systemic, and coordinated removal of heat, smoke and fire gases, and their replacement with cooler fresh air

Question 7

SOG 17-01 Ventilation

definition- Vent limited- a fire in which the heat release rate and fire growth are regulated by the available oxygen within the space, indicators may include

Answer 7

• fire beyond incipient stage
• mid to low neutral plane ( smoke layering)
• flames exiting a window or door
• air being drawn into the fire when door is opened
• increased tempuatures but will be decaying stage
• common back draft

Question 8

SOG 17-01 Ventilation

Definition- Ventilation profile

Answer 8

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

Question 9

SOG 17-01 Ventilation

The following should be considered when determining a structured Ventilation profile (9)

Answer 9

• existing and or potential flow-paths
• the location and stage of the fire
• fuel or vent limited
• wind direction
• smoke conditions, volume, velocity, density, colour
• exposures
• rescue or suppression
• building layout and construction
• integrated Ventilation system

Question 10

SOG 17-01 Ventilation

Closing an open door to a structure immediately upon arrival

Answer 10

until these is a tactical advantage to opening it

Question 11

SOG 17-01 Ventilation

Personnel shall decide on Ventilation tactics, natural, mechanical, or hydraulic consider the following when choosing your tactical plan for ventilation (4)

Answer 11

• tactics that complement the incident action plan
• the location of personnel committee to interior operations
• occupant location
• how tactics may affect flow-paths, fire behaviour and operational frames

Question 12

SOG 17-01 Ventilation

Suppression and ventilation tactics shall be controlled,, communicated and coordinated

Answer 12

personnel shall be advised of the changes to the Ventilation profile or conditions as a result of tactical ventilation