Which item is included in Level A protection but not in Level B protection?

• A. Positive pressure SCBA
• B. Inner gloves
• C. Hooded clothing
• D. Totally encapsulated chemical- and vapor-protective suit

Answer: (D)

Protection levels differ by how completely the worker is sealed from the environment. Level A uses a fully encapsulating, gas- and vapor-tight suit worn with a self-contained breathing apparatus, providing total protection of skin and respiratory system from hazardous vapors and chemicals. Level B offers high-level protection with chemical-resistant clothing and a hood plus a respirator, but it is not gas-tight and does not envelop the wearer inside a sealed suit. Because of that, the item that belongs to Level A but not Level B is the totally encapsulated chemical- and vapor-protective suit. Inner gloves and hooded clothing can appear in both configurations, and the breathing apparatus is common to Level A and can be used in Level B, so these are not exclusive to Level A.