BA

Question 1

Air composition (inhaled)

Answer 1

Nitrogen 79%
Oxygen 21%
Carbon Dioxide 0.04% (Trace)

Question 2

Air composition (Exhaled)

Answer 2

Nitrogen 79%
Oxygen 17%
Carbon Dioxide 4%

Question 3

What is HOTS?

Answer 3

High air temperatures
Oxygen deficiency
Toxic atmospheres
Smoke concentration

Question 4

how many litres of air does a fully charged BA cylinder contain?

Answer 4

6.8L x 300 BAR = 2040L of compressed dry air

Question 5

What is the actual working duration whilst using a BA?

Answer 5

6.8 x 300 BAR = 2040L
2040L / 60 = 34 mins
34 - 10 mins Decon/safety
= 24 mins
= 20 mins FF time

Question 6

8 Expectations of a BA operator

Answer 6

• work in teams of 2 at-least
• select a designated fire ground channel on portable radios
• Deposit BA Tally tags at a BA entry prior to entering a building.
• Enter correct and relevant details on BA Tally Tag.
• Report to the BA entry and collect their BA tally tags on exiting the fire/incident. There must be a separate record for re-entry.
• Check timeout/low air periodically.
• Exit the fireground accompanied by at least 1 other member of the team when the cylinder pressure gauge of their BA reaches a pre-determined level, or the cylinder low air warning operates.
• Proceed towards the sound of a full alarm or distress signal.
• All crews will withdraw immediately upon the operation of the evacuation alarm.
• Use guidelines on the instruction of the IC.
• Report to BA Service after collecting BA tally tags from BA entry