After the second-stage regulator, the O2 pressure in the low-pressure system is typically in which range?

After the second-stage regulator, the O2 pressure in the low-pressure system is typically in which range?

• A. 4-8 psi
• B. 14-16 psi
• C. 20-22 psi
• D. 28-30 psi

Answer: (B)

After the second-stage regulator, the gas is in the low-pressure system and needs a stable, modest pressure to feed the flowmeters and vaporizers. For oxygen, this low-pressure output is typically around 14–16 psi. This level is high enough to push gas through the flowmeters reliably but low enough to keep the system safe and controllable. The other ranges are not representative: 4–8 psi is too low to drive the flowmeters effectively, 20–22 psi is higher than the usual oxygen low-pressure output, and 28–30 psi corresponds more to the low-pressure range seen with nitrous oxide rather than oxygen.

After the second-stage regulator, the gas is in the low-pressure system and needs a stable, modest pressure to feed the flowmeters and vaporizers. For oxygen, this low-pressure output is typically around 14–16 psi. This level is high enough to push gas through the flowmeters reliably but low enough to keep the system safe and controllable. The other ranges are not representative: 4–8 psi is too low to drive the flowmeters effectively, 20–22 psi is higher than the usual oxygen low-pressure output, and 28–30 psi corresponds more to the low-pressure range seen with nitrous oxide rather than oxygen.