What is the function of the oxygen masks present in the Demo Equipment Pouch?

The oxygen masks present in the Demo Equipment Pouch serve the primary function of providing supplemental oxygen to passengers in the event of a cabin depressurization or when the cabin air quality is compromised. This is crucial for maintaining passenger safety and comfort, as it ensures that individuals can continue to breathe easily in situations where regular cabin air may be insufficient due to decreased atmospheric pressure or other airborne toxins.

In an emergency scenario, the oxygen masks are deployed automatically or manually, and it is vital for passengers to be aware of their proper use, which is often demonstrated during safety briefings by flight attendants. By familiarizing passengers with these procedures, airlines help to ensure a quick and effective response during critical situations.

The other answer choices do not accurately reflect the intended use of the oxygen masks. While cooling the cabin temperature, testing the air filtration system, and serving medical emergencies may be considerations in aviation safety, they do not pertain to the specific role of the oxygen masks in providing supplemental oxygen to passengers. Thus, the focus on oxygen delivery underscores the importance of respiratory safety in flight.