With a Level A suit, the SCBA is worn inside the PPE.

With a Level A suit, the SCBA is worn inside the PPE.

• A. Worn outside the PPE
• B. Worn inside the PPE
• C. Attached to the belt only
• D. Not used with Level A suit

Answer: (B)

With a Level A suit, the breathing air must come from an independent source that remains inside the protective barrier. Wearing the SCBA inside the PPE ensures any potential gaps or seams stay sealed, and the suit stays under positive pressure, which helps keep contaminants from entering the breathing zone. This arrangement is what provides the highest level of protection when hazards are unknown or highly toxic. Wearing the SCBA outside the PPE would expose the breathing air path to the external environment and could allow contaminated air to breach the suit’s seals. Simply attaching the SCBA to the belt misses the full integrated system and positive-pressure protection the Level A ensemble requires. And Level A is defined by using this independent air supply inside the suit, not by omitting the SCBA.

With a Level A suit, the breathing air must come from an independent source that remains inside the protective barrier. Wearing the SCBA inside the PPE ensures any potential gaps or seams stay sealed, and the suit stays under positive pressure, which helps keep contaminants from entering the breathing zone. This arrangement is what provides the highest level of protection when hazards are unknown or highly toxic.

Wearing the SCBA outside the PPE would expose the breathing air path to the external environment and could allow contaminated air to breach the suit’s seals. Simply attaching the SCBA to the belt misses the full integrated system and positive-pressure protection the Level A ensemble requires. And Level A is defined by using this independent air supply inside the suit, not by omitting the SCBA.