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17- A220 O2 and Emergency Equipment Questions with Detailed Verified Answers

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17- A220 O2 and Emergency Equipment Questions with Detailed Verified Answers

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17- A220 O2 and Emergency Equipment
Questions with Detailed Verified Answers

Question: Name the three different oxygen systems onboard the A220

Ans✅ ✅: Flight Deck Oxygen, Cabin Oxygen and portable oxygen.

Question: What microphones disable and enable once the mask
stowage box doors are
opened?

Ans✅ ✅: The headset and handset microphones are inhibited, and the oxygen mask
microphone is automatically enabled.

Question: What is the function of the N/100% oxygen supply lever in N
(Normal)?

Ans✅ ✅: The regulator supplies a mixture of oxygen and cabin air to the mask.

At 35000ft the air inlet on the regulator closes and 100% pure oxygen will

be delivered regardless of selector position.

Question: What are the two functions of the O2 PRESS TO TEST AND
RESET control lever?

Ans✅ ✅: It allows the testing of oxygen flow without removing the mask. It also
closes the flow of oxygen after usage and resets the microphone to enable headset
communication.

Question: What is the location of the overboard discharge indicator?

Ans✅ ✅: Located on the lower left side of the fuselage by the ground

servicing panel.

Question: What is the normal cylinder pressure for the cabin oxygen
system?

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