Which gas is used for aircraft servicing?

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Multiple Choice

Which gas is used for aircraft servicing?

Explanation:
The gas used for aircraft servicing is gaseous oxygen. Aircraft oxygen systems are designed to deliver breathable oxygen through regulators and distribution lines that expect a gas, not a liquid or a mixed gas. Gaseous oxygen from a service cart can be stored, regulated, and delivered safely to masks and outlets without the cryogenic handling, venting, and rapid expansion hazards that liquid oxygen would entail. Oxygen-enriched air isn’t used because it would raise the oxygen level and increase fire risk, and compressed air isn’t suitable because it isn’t breathable oxygen. Hence, gaseous oxygen is the appropriate form for servicing the aircraft’s oxygen system.

The gas used for aircraft servicing is gaseous oxygen. Aircraft oxygen systems are designed to deliver breathable oxygen through regulators and distribution lines that expect a gas, not a liquid or a mixed gas. Gaseous oxygen from a service cart can be stored, regulated, and delivered safely to masks and outlets without the cryogenic handling, venting, and rapid expansion hazards that liquid oxygen would entail. Oxygen-enriched air isn’t used because it would raise the oxygen level and increase fire risk, and compressed air isn’t suitable because it isn’t breathable oxygen. Hence, gaseous oxygen is the appropriate form for servicing the aircraft’s oxygen system.

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