How long does oxygen flow last on the E-190?

How long does oxygen flow last on the E-190?

• A. 12 minutes
• B. 6 minutes
• C. 10 minutes
• D. 15 minutes

Answer: (A)

Oxygen duration is determined by the design of the onboard oxygen system: the amount of oxygen in the bottles and the regulator flow rate set to provide a continuous supply to each mask. On the E-190, that design yields about 12 minutes of oxygen flow per passenger mask once deployed. This duration is chosen to cover the initial critical period of a depressurization and descent to a safe altitude. So 12 minutes is the specification the system provides. The other time options don’t match the aircraft’s stated oxygen supply duration.

Oxygen duration is determined by the design of the onboard oxygen system: the amount of oxygen in the bottles and the regulator flow rate set to provide a continuous supply to each mask. On the E-190, that design yields about 12 minutes of oxygen flow per passenger mask once deployed. This duration is chosen to cover the initial critical period of a depressurization and descent to a safe altitude. So 12 minutes is the specification the system provides. The other time options don’t match the aircraft’s stated oxygen supply duration.