Understanding Emergency Oxygen Masks on Airplanes

The video explains how emergency oxygen masks on airplanes work without storing oxygen. Instead, they use chemical oxygen generators that produce oxygen on demand. The process is triggered by pulling the mask, which releases a safety pin and creates a spark to start the chemical reaction. This reaction decomposes sodium chlorate into oxygen and table salt. The oxygen supply lasts about 30 minutes, enough to descend to a breathable altitude.

What is the primary role of oxygen in the context of fire?

• To extinguish the fire

• To fuel the fire

• To cool down the fire

• To prevent the fire from spreading

What do emergency oxygen masks on airplanes connect to?

• Oxygen tanks

• Ventilation systems

• Chemical oxygen generators

• Air filters

How is the oxygen flow initiated in an emergency oxygen mask?

• By pressing a button

• By pulling the mask towards you

• By turning a knob

• By blowing into the mask

What happens when the safety pin of the generator is released?

• The mask inflates

• A spark is created to start a chemical reaction

• A chemical reaction is stopped

• The generator is deactivated

What is the main by-product of the chemical reaction in the oxygen generator?

• Water vapor

• Carbon dioxide

• Table salt

• Nitrogen

How long do the oxygen generators typically provide oxygen?

• 10 minutes

• 30 minutes

• 1 hour

• 2 hours