FAA Aviation Mechanic General (AMG)Ground Operations and ServicingMedium
A shop receives a shipment of compressed oxygen cylinders for servicing aircraft oxygen systems. Which storage practice is correct?
- ACoat cylinder valves lightly with grease to prevent corrosion and ease connection
- BStore oxygen cylinders near acetylene cylinders to save space, as both are inert gases
- CStore oxygen cylinders horizontally on the floor to prevent tipping
- DStore oxygen cylinders upright, secured, and separated from flammable gases and oil/grease
Show answer & explanationAnswer & explanation
Correct answer: D. Store oxygen cylinders upright, secured, and separated from flammable gases and oil/grease
Compressed oxygen cylinders must be stored upright, secured against tipping, and kept away from flammable materials, oil, and grease, since oxygen dramatically accelerates combustion and can cause explosive reactions with hydrocarbons. Acetylene is flammable, not inert, and should never be stored with oxygen; grease on oxygen fittings is a serious explosion hazard.
Why the other options are wrong
- A. Grease or oil in contact with oxygen can cause spontaneous combustion or explosion.
- B. Acetylene is highly flammable, not inert, and must not be stored with oxygen.
- C. Cylinders should be stored upright and secured, not horizontally on the floor.
Oxygen Cylinder Storage/Handling
Compressed oxygen must be stored upright and secured, away from flammable materials, oil, and grease due to its strong oxidizing properties.
- Oxygen supports combustion violently; never mix with oil/grease
- Store away from flammable gases like acetylene
- Cylinders secured upright to prevent valve damage if they fall
Memory trick: Oxygen loves fire — keep it clean, upright, and alone.