The Emergency Breathing Support System (EBSS) will draw air from which cylinder first?

The Emergency Breathing Support System (EBSS) will draw air from which cylinder first?

• A. Highest cylinder
• B. Lowest cylinder
• C. Either cylinder randomly
• D. Center cylinder

Answer: (B)

The Emergency Breathing Support System is designed to borrow air from a second cylinder when needed, and it prioritizes the cylinder that is physically lowest on the wearer’s back. This lower cylinder provides the most direct, gravity-assisted path to the EBSS flow and is easiest to feed from under typical body positions. If the lower cylinder’s pressure drops or its flow path becomes insufficient, the system will automatically shift to the other cylinder to keep air flowing. So, the EBSS will draw air from the lowest cylinder first.

The Emergency Breathing Support System is designed to borrow air from a second cylinder when needed, and it prioritizes the cylinder that is physically lowest on the wearer’s back. This lower cylinder provides the most direct, gravity-assisted path to the EBSS flow and is easiest to feed from under typical body positions. If the lower cylinder’s pressure drops or its flow path becomes insufficient, the system will automatically shift to the other cylinder to keep air flowing. So, the EBSS will draw air from the lowest cylinder first.