MESA Airlines E-175 Study Guide Oxygen system Questions And Answers With Verified Tests

Can the O2 door dispensing units be opened manually if it fails to automatically deploy? - Answer-Yes, via a Manual Release Tool (MRT) located at each FA station Do the cockpit crew and the passengers share the same emergency oxygen? - Answer-No, the cockpit crew uses an O2 cylinder and the cabin passengers use O2 chemical generators During preflight how would you know if the cockpit crew O2 has been over pressurized? - Answer-The green blow-out disc would be missing on the forward right side of the fuselage How many portable O2 cylinders are installed in the cabin? - Answer-2, one in the FWD section and 1 in the AFT section 2 masks per cylinder Once the chemical O2 generators are started can they be shut off? - Answer-No! What activates when the flight deck O2 masks are removed from their storage unit? - Answer-Flow of O2 Mask microphone Flight deck speakers What does the PBE provide? - 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) What happens if the TEST/RESET button is pressed while the flight deck O2 masks are not stowed? - Answer-Stops flow of O2Deactivates mask microphone Deactivates flight deck speakers What is the minimum O2 for a cockpit crew? - Answer-2 crew "Blue for 2" 3 crew "Green for 3" What is the O2 duration for the following? - Answer-Passenger O2 12 min Flight Attendant cylinder 30 min PBE 15 min What type of oxygen will the quick-donning cockpit crew masks provide? - Answer-Emergency Pure oxygen with positive pressure 100% Pure oxygen at all altitudes Normal Oxygen/air mixture (ratio depends on cabin altitude) When will the passenger O2 masks automatically deploy - Answer-Cabin altitude of 14,000 MSL Where can O2 pressure be read? - Answer-MFD 'STATUS' page (corrected for temperature) At the O2 cylinder panel (un-corrected for temperature)