11.15 Flashcards
Sea level lung pressure
19.6psi
What oxygen do aircraft use and why
Aviator because it’s dry
Why don’t we use medical or technical oxygen
There’s droplets in Medical
Technical oxygen is contaminated
How far should you be from oxygen when smoking
15m
What’s the pressure of o2 bottles
1850psi
When is passenger o2 used
If cabin de pressurises
When are passenger oxygen masks automatically released
Above 14000ft
Where is oxygen stored
Cargo compartment or main equipment centre
Oxygen pressure range
1800-1850 psi but can handle up to 2400psi
What are o2 bottles made of
Made of alluminum but wrapped with Kevlar
How are o2 bottles tested
Hydrostatically tested periodically
What is the shut off valve used for on an o2 bottle
To open or close it
Valve has to be fully open or fully closed
What does the saftey disk do
Burst when pressure is too high - 2600psi
How do bottle indicate their pressure
Direct reading pressure gauge
When does the green saftey disk rupture
When safety device opens
What happens if green disc ruptures
Each bottle read to find out which one triggered the discharge
What’s the purpose of the thermal compensator
Distribute heat through something like a brush with a large surface area
It’s one unit
Why must you not disconnect B-nuts
The whole unit will have to be replaced
How is oxygen distributed
Through lines and manifolds
How is breathing oxygen tape identified
Green band with Black rectangular symbol printed on a white background boarder strip
Where is chemical oxygen generator stored
Overhead psu
What chemical is in an oxygen generator
Sodium chlorate
How many oxygen masks per seat
Extra masks per seat row extra for infants
3 seats 4 masks
How many oxygen masks per seat
Extra masks per seat row extra for infants
3 seats 4 masks
How long does a oxygen generator last for
10-20 minutes of oxygen
What are the one and two step procedures used for
Reduce oxygen pressure
How does one step work
Pressure regulator is mounted on bottle to reduce pressure
How does 2 step work
Pressure regulator mounted on o2 and then after it to reduce pressure further
What is portable oxygen used for and how many people does it supply
Used for emergency and first aid
Supply 2-4 people
What’s a full face mask for
Protection from smoke and dangerous gases
What two type of o2 makes is there
Full face and continuous flow
How is a smoke hood packed and how long does it last
Vacuum packed and lasts 20m
How do you know a leak test has found oxygen
Bubbles indicate a leak
What’s the flow indicator for
To show system is functioning correctly
What is the general colour of a blow out disk
Green
What does oxygen flow control unit do
Reduce o2 pressure to a useable level
Where is oxygen stored in the gaseous system
Bottles
What does the ring line in the cabin do
Connects every psu to flow control unit and transports pressure push
