1
Q
Define ventilation
A
Removal of heated air, smoke and other airbourne contaminents from a structure or location and replace it with cleaner cooler air
2
Q
What are the phases of ventilation
A
Phase 1 - Post fire once the fire has been completely extinguished
Phase 2 - fire has been controlled but not extinguished (defensive)
Phase 3 - Before control of fire (offensive)
3
Q
What level can lincoln work off?
A
Phase 1
4
Q
How far should the fan be placed away?
A
2m if possible
5
Q
What are the forced ventilation types
A
- Positive pressure - using the fan
- Negative pressure - using the branch using the venturi principle 3.
- Mechanical - using a system already in place such as factory vents
6
Q
What are the asvantages of PPV
A
- Replenish the O2 and reduce carbon monoxide levels
- Control temp and humidity
- Remove moisture, dust and other airbourne contaminents
- Improved vis and aids navigation
- Restricts fire and smoke damage to property
7
Q
What do you open first
A
Open exhaust
8
Q
Name 3 reasons why PPV not working
A
- Is the area too big?
- Is the exhaust vent too big?
- Is the fan working to maximum efficiency?
- Is the path from the fan to exhaust vent obstructed?
- Is sequential ventilation needed?
9
Q
When should PPV not be used?
A
If its showing signs and symptoms of a backdraught
10
Q
Name some health and safety points
A
- Is user competent
- Dont use on stairs
- Use ear defenders
- Visors down
- Solid ground
- Dont refuel when in use
- Dont move it once in use
- Dont start it if it looks damaged
