Which statement best describes the primary difference between level B and level C chemical protective garments?

• A. Chemical permeation resistance
• B. Level of respiratory protection
• C. Thermal protection
• D. Visibility

Answer: (B)

The key difference between these two levels is the respiratory protection they provide. Level B uses a supplied-air respirator or self-contained breathing apparatus, delivering a high level of protection even in atmospheres that may be hazardous or oxygen-deficient. Level C relies on an air-purifying respirator, which protects only as long as the ambient oxygen is sufficient and the contaminants can be filtered effectively. So, the primary distinction is the type and level of respiratory protection, with Level B offering greater protection to the lungs and breathing air.