Oxygen Flashcards
% nitrogen in air
78
% oxygen in air
21
% inert gas in air
1
When altitude increases what happens to air pressure and density
Air pressure and density decrease
What altitude do effects of exhaustion and sleepiness happen
14000ft
What oxygen is used on aircraft
Aviators
Why is medical not used
Water droplets
Why is technical never used
Contaminated
Cautions for using o2
Open valves slow
Charging too fast causes can overheat and cause explosion
Make sure hands clean & oil free
What are o2 bottles made of
Steel alloys or Kevlar
O2 bottle colour
Dark green
Max capacity of o2 bottle
3200 litres
O2 bottle pressure stored at
1850 psi
What temp is o2 bottle measured at
21 degrees c
How do u work out how full a bottle is
Pressure and temp
Shape of bottle head
Cylinder
What safety device is added to bottle
Disk
What pressure does disk burst
2600 psi
When can you not refill bottle
Pressure under 50psi
What’s the purpose of a thermal compensator
Distribute heat through a large surface area
How is oxygen distributed
Lines and manifolds
Where is the pressure reg located and what does it do
Near oxygen bottles to reduce length of high pressure lines
How is bottle pressure indicated
Direct reading gauge and external pressure gauge located near filling panel
What are the indications of an o2 bottle
Green usually amber when pressure low
Where are masked stored in cockpit
Stowage box
How many masks available in cockpit
4 - 2 for pilot 2 for observes
How do you know when there’s oxygen flow
Flow indicator blinks
What type of mask is an oxygen mask
Full face quick donning mask
How quick can flight crew put mask on
One hand in 5 seconds
What are the operating modes of oxygen masks
Normal
100% o2 which is used above 35000 ft
Emergency
Cabin pressure normally
8000 ft
What altitude does o2 mask auto deploy
14000 ft
Why is there a special tool for opening single stowage boxes
So you don’t activate the whole system
Systems oxygen is supplied with
Chemical and gaseous
Tempteture of decomposition of sodium chlorate
350 degrees
How long does an activated generator produce oxygen for
12-15m
What is the purpose of smoke hood
Provide protection to eyes and lungs
How long do smoke hoods provide a breathable environment
30m
What are the types of masks with portable cylinders
Full face and continuous flow used for first aid
