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  1. What happens if the cockpit oxygen pressure digital readout is below 842 psi?
    This indicates a NO DISPATCH condition
  2. Do the cockpit crew and the passengers share the same emergency oxygen?
    No, the cockpit crew uses a single high pressure O2 cylinder and the cabin passengers use O2 chemical generators
  3. Once the chemical O2 generators are started, can they be shut off?
  4. What is the minimum O2 for a cockpit crew and color displayed?
    • 2 crew: 842 psi, cyan
    • 3 crew: 1150 psi, green
    • No Dispatch: amber
  5. What activates when the flight deck O2 masks are removed from their storage unit?
    • Flow of O2
    • Mask microphone
    • Flight deck speakers
  6. What happens if the TEST/RESET button is pressed while the flight deck O2 masks are not stowed?
    • Stops flow of O2
    • Deactivates mask microphone
    • Deactivates flight deck speakers
  7. What type of oxygen will the quick-donning cockpit crew masks provide?
    • Emergency: Pure oxygen with positive pressure
    • 100%: Pure oxygen at all altitudes
    • Normal: Oxygen/air mixture on demand
  8. During preflight, how would you know if the cockpit crew O2 has been overpressurized?
    The green blow-out disc would be missing on the forward right side of the fuselage
  9. What is the duration for passenger O2?
    12 minutes
  10. What is the duration of the Flight Attendant cylinder?
    30 minutes
  11. What is the duration of the PBE?
    15 minutes
  12. When will the passenger O2 masks deploy automatically?
    AUTO on the Passenger Oxygen knob and cabin altitude between 14,000' and 14,750'
  13. What does the OFF position of the PASSENGER OXYGEN knob do?
    Disables the automatic deployment feature
  14. The caustion message PAX OXY NOT DEPLOYED will appear when?
    Cabin altitude is above 14,200' with passenger oxygen masks not deployed
  15. Can the O2 door dispensing units be opened manually if it fails to automatically deploy?
    Yes, via a Manual Release Tool (MRT) located at each FA station
  16. Selecting the OVRD (Override) position on the PASSENGER OXYGEN knob will do what?
    Deploys the passenger oxygen masks regardless of cabin altitude
  17. What is indicated when the MASK DEPLOYED light is on?
    The passenger and flight attendant oxygen masks have been deployed
  18. How is passenger oxygen supplied?
    Individual chemical oxygen generators located in the passenger service units, lavatories, flight attendant stations, and galley areas
  19. What does the PBE provide?
    Pressurized O2 and protection from smoke, fumes, and fire up to 40,000' for at least 15 minutes
  20. How many portable O2 cylinders are installed in the cabin?
    • 2, one in the FWD section and one in the aft
    • 2 masks per cylinder
  21. What signs automatically illuminate when the oxygen masks drop?
    • PED
  22. Above what altitude must a pilot wear their oxygen mask if the other pilot leaves the cockpit?
Card Set:

E-170/190 Oxygen System
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