11.15 OXYGEN👌🏼 Flashcards
What could happen to passengers if cabin pressure was lost
- passengers suffer from hypoxia
- insufficient oxygen
What cabin pressure should be maintained when cruising
8000ft
What colour are oxygen cylinders
Typically green
Which oxygen type is used in aircraft and why
- Aviators oxygen
- as it is dry
Why is medical oxygen never used on aircraft
- contains water droplets and therefore freezes
Why is technical oxygen never used
- Contaminated therefore not suitable for breathing
What flow systems are used for flight crew
- diluted demand
- constant pressure demand
What pressure is supplied from the oxygen bottles
- 1850 psi
Can we provide 1850 psi straight away to the occupants
No
Where is the flight deck oxygen system located
- avionics or cargo compartment
What are pressure regulators
- regulate pressure to make sure oxygen is not over pressurised or under pressurised
When is the passenger oxygen system active
- when cabin is depressurised
If the cabin is above ———-ft the passenger oxygen system is automatically activated
14000ft
How do you ensure oxygen bottles stay serviceable
- periodically perform a hydrostatic test
What is the function of the shut-off valve
Opens and closes the bottle
If temp or pressure gets too high the safety disc bursts (T or F)
T
When would you use a thermal compensator
- when re-filling and a danger of heat concentration
- distributes heat through brush like surface
Where are the portable oxygen equipment stored
- Cockpit
- near exits and passenger compartment
When would you use a portable oxygen system
Emergency or first-aid
Explain a 2 step process for supply regulation
- high oxygen pressure system that is reduced to intermediate level. Then reduces even further to a usable pressure
Explain a 1 step process for supply regulation
- high pressure system reduced directly to usable pressure
Can flight deck deploy emergency continuous passenger oxygen masks (T or F)
T
Can the passenger oxygen system be opened manually, and with what
Yes with a special tool
2 ways oxygen is supplied to the system
- chemical system
- gaseous system
Explain oxygen generator
- stored in overhead PSU
- 1 person pulls, the whole row activates
- generator filled with sodium chlorate
- provides oxygen until it burns out (up to 20 mins)
- requires replacement
What is the flow control unit for
- reduce oxygen pressure to a usable level
What is the flow control unit for
- reduce oxygen pressure to a usable level
What is the use for the transparent bag on the mask
- to recirculate oxygen
If oxygen cylinder is subjected to high temperature and pressure, what feature is used to protect aircraft and components.
- thermal compensator
- thermal discharged disc
- both
- thermal discharged disc
Which component should be installed when charging oxygen cylinders
- Thermal discharged disc
- Thermal compensator
- Both
- Thermal compensator
Where are the oxygen generators stored
- Passenger service unit (PSU)
