Oxygen Systems Flashcards
When is the O2 mask microphone activated?
When the left hand O2 mask door is opened
The boom microphone may be reactivated with the O2 mask out of its storage cabinet by doing what?
Closing the left O2 mask door and pushing RESET
What type of O2 mask is available in the crew rest areas?
Dixie cup style drop down masks and walk around bottles
Selecting RESET on the SUPRNMRY OXY switch will shutoff O2 flow to the Dixie-cup style masks only if the cabin altitude is below what?
12,000’
Supernumerary oxygen masks will automatically deploy if what conditions exist?
The SUPRNMRY OXY switch is in NORM and the cabin reaches 14,000’
While operating at flight levels above FL___ the Captain or FO will don and utilize their oxygen masks.
410
What is the function of the reset switch position of the supernumerary oxygen switch on the overhead panel?
Closes flow control unit electrically only in lavatory and crew rest areas when cabin altitude below 12,000’
The validity of the oxygen duration tables are based on which of the following assumptions?
Lavatory and crew rest oxygen is shutoff when supernumeraries return to seats
How many portable oxygen bottles are installed on the Freighter?
5
How many portable oxygen bottles are installed on the BCF?
8
During the preflight check of the crew oxygen mask, a pressure decrease of more than __ psi may indicate the crew oxygen cylinder shutoff valve is closed and oxygen is unavailable.
100
Oxygen flowing to the crew oxygen mask is indicated by?
Yellow cross in oxygen flow indicator on the oxygen mask panel
Quick donning full face diluter-demand type masks are located at which crew positions?
Captain, FO, First observer
Quick donning, diluter-demand oxygen masks are installed in which positions?
All supernumerary seat positions
During preflight, the NORMAL/100% switch on the O2 mask should be set to what?
100%
