PPV

Question 1

Define ventilation

Answer 1

Removal of heated air, smoke and other airbourne contaminents from a structure or location and replace it with cleaner cooler air

Question 2

What are the phases of ventilation

Answer 2

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)

Question 3

What level can lincoln work off?

Answer 3

Phase 1

Question 4

How far should the fan be placed away?

Answer 4

2m if possible

Question 5

What are the forced ventilation types

Answer 5

1. Positive pressure - using the fan
2. Negative pressure - using the branch using the venturi principle 3.
3. Mechanical - using a system already in place such as factory vents

Question 6

What are the asvantages of PPV

Answer 6

1. Replenish the O2 and reduce carbon monoxide levels
2. Control temp and humidity
3. Remove moisture, dust and other airbourne contaminents
4. Improved vis and aids navigation
5. Restricts fire and smoke damage to property

Question 7

What do you open first

Answer 7

Open exhaust

Question 8

Name 3 reasons why PPV not working

Answer 8

1. Is the area too big?
2. Is the exhaust vent too big?
3. Is the fan working to maximum efficiency?
4. Is the path from the fan to exhaust vent obstructed?
5. Is sequential ventilation needed?

Question 9

When should PPV not be used?

Answer 9

If its showing signs and symptoms of a backdraught

Question 10

Name some health and safety points

Answer 10

1. Is user competent
2. Dont use on stairs
3. Use ear defenders
4. Visors down
5. Solid ground
6. Dont refuel when in use
7. Dont move it once in use
8. Dont start it if it looks damaged