MESA Airlines E-175 Study Guide (Oxygen system)2023/2024 latest update

MESA Airlines E-175 Study Guide (Oxygen system) Where can O2 pressure be read? - correct answer MFD 'STATUS' page (corrected for temperature) At the O2 cylinder panel (un-corrected for temperature) Do the cockpit crew and the passengers share the same emergency oxygen? - correct answer No, the cockpit crew uses an O2 cylinder and the cabin passengers use O2 chemical generators Once the chemical O2 generators are started can they be shut off? - correct answer No! What is the minimum O2 for a cockpit crew? - correct answer 2 crew "Blue for 2" 3 crew "Green for 3" What activates when the flight deck O2 masks are removed from their storage unit? - correct answer Flow of O2 Mask microphone Flight deck speakers What happens if the TEST/RESET button is pressed while the flight deck O2 masks are not stowed? - correct answer Stops flow of O2 Deactivates mask microphone Deactivates flight deck speakers What type of oxygen will the quick-donning cockpit crew masks provide? - correct answer Emergency Pure oxygen with positive pressure 100% Pure oxygen at all altitudes Normal Oxygen/air mixture (ratio depends on cabin altitude) During preflight how would you know if the cockpit crew O2 has been over pressurized? - correct answer The green blow-out disc would be missing on the forward right side of the fuselage What is the O2 duration for the following? - correct answer Passenger O2 12 min Flight Attendant cylinder 30 min PBE 15 min When will the passenger O2 masks automatically deploy - correct answer Cabin altitude of 14,000 MSL Can the O2 door dispensing units be opened manually if it fails to automatically deploy? - correct answer Yes, via a Manual Release Tool (MRT) located at each FA station What does the PBE provide? - correct answer Pressurized O2 and protection from smoke, fumes, and fire up to 41,000 ft. for at least 15 minutes Blue indication: Good Pink indication: Bad Vacuum loss: Bad (even with a blue indication) How many portable O2 cylinders are installed in the cabin? - correct answer 2, one in the FWD section and 1 in the AFT section 2 masks per cylinder