Which respirator system has a continuous supply of air from outside the confined space?

Which respirator system has a continuous supply of air from outside the confined space?

• A. Self-Contained Breathing Apparatus
• B. Supplied Air Respirator
• C. Powered Air-Purifying Respirator
• D. Escape-Only Respirator

Answer: (B)

In confined-space work, the air you breathe must come from outside the space to avoid contaminant exposure. A supplied-air respirator delivers a continuous flow of breathable air through a hose connected to an external air source, so the wearer’s air supply stays clean regardless of the space’s atmosphere. This external, steady supply is what makes it the right choice. By comparison, a self-contained breathing apparatus carries air on the wearer and is limited by the cylinder’s duration, a powered air-purifying respirator relies on filtered ambient air, and an escape-only respirator is intended for quick exit, not ongoing work inside.

In confined-space work, the air you breathe must come from outside the space to avoid contaminant exposure. A supplied-air respirator delivers a continuous flow of breathable air through a hose connected to an external air source, so the wearer’s air supply stays clean regardless of the space’s atmosphere. This external, steady supply is what makes it the right choice. By comparison, a self-contained breathing apparatus carries air on the wearer and is limited by the cylinder’s duration, a powered air-purifying respirator relies on filtered ambient air, and an escape-only respirator is intended for quick exit, not ongoing work inside.