Test 3: Oxygen Review Flashcards
Why do we want to fly higher in the atmosphere?
Air is less dense which results in:
- Less fuel burnt
- Decreased drag
- Turbulence and Weather avoided
The lack of OXYGEN going into the BRAIN when we go to higher ALTITUDES is called what?
HYPOXIA
What are the ways of supplying more oxygen to crew and passengers on large aircrafts?
Cabin altitude is kept at 8000ft regardless of cabin alt
increase O2 level in air mixture
supplemental O2
bottled O2
What are the ways of supplying O2 in small to medium aircrafts designed with no pressurization?
SUPPLEMENTAL O2
How do we store GASEOUS oxygen?
GREEN
High Pressure cylinders made of heavy STEEL tanks rated for 1800-1850psi
Newer oxygen cylinders are made up of what?
Lightweight ALUMINUM shell WRAPPED in KEVLAR
What should be clearly marked on any of the cylinders?
AVIATORS BREATHING OXYGEN
When is an oxygen cylinder considered empty?
below 50psi
What is hydrostatic testing?
??
Oxygen system used in aircraft depends on what?
Type and Operation requirements
Explain the simplest form of a CONTINUOUS FLOW SYSTEM
a PRESET flow of O2 exits tank through VALVE passes REGULATOR(reduces pressure) fed into a tank till valve is CLOSED
In a continuous flow system, how is the flow controlled for higher altitudes?
ADJUSTABLE REGULATOR provides variable O2 flow to match the altitude
What is a downside to the CONTINUOUS FLOW SYSTEM?
WASTEFUL when exhaling
This tool allows efficiency by capturing exhaled O2 in a bag while still allowing air to escape through vents
RE-BREATHER MASK
What is a lanyard and what does it do?
A chord that wraps around your head
when pulled ignites the O2 candle and starts O2 flow
What type of O2 system do we use on high performance and transport category systems?
DEMAND FLOW type
In short what is a demand flow type O2 system?
Only delivers O2 when inhaled/demanded
Describe the DEMAND FLOW TYPE?
O2 exits tank, through VALVE passes REGULATOR/REDUCER then through PRESSURE REGULATOR near mask to adjust pressure/flow to user
This component lowers the O2 to 60-85psi
PRESSURE REGULATOR
What type of mask do we use in a DEMAND FLOW TYPE system?
CLOSE FITTING DEMAND
What are the 2 types of REGULATORS?
DILUTED DEMAND
PRESSURE DEMAND
This type of regulator HOLDS BACK the flow until user inhales and DILUTES the pure O2 with cabin air
DILUTER DEMAND
How does the PRESSURE DEMAND type regulator work?
O2 delivered through individual pressure regulator under HIGH PRESSURE then FORCED into users lungs
What is a flow indicator?
a lightweight object/apparatus moved by the flow of O2
verifies it is working
