SOG Section 17 Ventilation

Question 1

17-01 VENTILATION
Personnel should be aware at all time that fire behavior may chance drastically due to the creation of opening in the structure by?(3)

Answer 1

1. Exiting occupants
2. Structural integrity failure due to the impact of heat
3. Firefighting actions

Question 2

17-01 VENTILATION

What are the factors in determining a ventilation profile?(6)

Answer 2

1. Existing and potential flow-paths
2. The location and stage of the fire
3. Fuel or vent limited
4. Wind direction
5. Smoke conditions: volume, velocity, density and colour
6. Exposures

Question 3

17-01 VENTILATION

What must be considered when deciding on ventilation tactics (natural, mechanical, or hydraulic)?(4)

Answer 3

1. ventilation tactics that compliment the incident action plan
2. the location of personnel committed to interior operations
3. occupant location
4. how tactics may affect flow-paths, fire behavior and operational time

Question 4

17-02 POSITIVE PRESSURE VENTILATION

What a must be considered during PPV?(6)

Answer 4

1. ensure fire is under control
2. fan operations shall be coordinated with interior personnel
3. fan placement shall cover entire inlet
4. exhaust locations should be created as necessary to ensure controlled smoke removal
5. an ongoing risk assessment shall be conducted
6. discounting the use of the fan when checking for extention

Question 5

17-02 POSITIVE PRESSURE VENTILATION

What document is SOG 17-02 PPV to be used in conjunction with?

Answer 5

SOG 3-24 structure fires
SOG 17-01 ventilation
training manual section 17

Question 6

17-03 POSITIVE PRESSURE ATTACK

What criteria are to be met when considering PPA?((6)

Answer 6

1. 360 complete
2. confirm victims are protected in place or removed from potential flow-paths
3. fire location is determined
4. the fire does not involve the structure
5. exhaust outlet should be at least equal to inlet
6. minimum two crews on scene

Question 7

17-03 POSITIVE PRESSURE ATTACK

What tactical considerations should be made

Answer 7

1. crew are ready with charged hose line
2. attack is being conducted from upwind to downwind
3. no class B chemicals or potential for dust explosion
4. exhaust outlet exposures are protected
5. exhaust outlet is monitored
6. consider extension into void space after PPA, shut down fan until no extension is determined
7. creating additional openings will create additional flow paths, making PPA ineffective