Which component connects the cylinder and regulators to the facepiece and delivers air at low pressure?

Which component connects the cylinder and regulators to the facepiece and delivers air at low pressure?

• A. Low-pressure hose.
• B. High-pressure line.
• C. Battery pack.
• D. Visor.

Answer: (A)

Air in an SCBA must be delivered to the facepiece at a breathable, low pressure after it’s been regulated. The component that carries this air from the regulators to the facepiece is the low‑pressure hose. It provides the path for the air that has been reduced from cylinder pressure to a safe breathing level, supplying the mask as you move. The high-pressure line, in contrast, carries air from the cylinder to the regulators at very high pressure and does not route air to the facepiece. The battery pack and visor are not involved in delivering breathing air.

Air in an SCBA must be delivered to the facepiece at a breathable, low pressure after it’s been regulated. The component that carries this air from the regulators to the facepiece is the low‑pressure hose. It provides the path for the air that has been reduced from cylinder pressure to a safe breathing level, supplying the mask as you move.

The high-pressure line, in contrast, carries air from the cylinder to the regulators at very high pressure and does not route air to the facepiece. The battery pack and visor are not involved in delivering breathing air.