What range is listed as oxygen safe levels?

What range is listed as oxygen safe levels?

• A. 19.5% to 23.5%
• B. 10% to 12%
• C. 15% to 18%
• D. 25% to 30%

Answer: (A)

Safe oxygen levels are defined to ensure air is breathable and not prone to ignition hazards. Normal ambient air has about 20.9% oxygen, and safety standards for breathable air sit roughly in the range of 19.5% to 23.5%. Staying within this window keeps people breathing comfortably and reduces the risk of fire or explosion that can come with too much oxygen. Falling below 19.5% is oxygen-deficient and can cause dizziness or unconsciousness, while rising above 23.5% makes the environment more fire-prone. So the range 19.5% to 23.5% is the standard for oxygen-safe levels.

Safe oxygen levels are defined to ensure air is breathable and not prone to ignition hazards. Normal ambient air has about 20.9% oxygen, and safety standards for breathable air sit roughly in the range of 19.5% to 23.5%. Staying within this window keeps people breathing comfortably and reduces the risk of fire or explosion that can come with too much oxygen. Falling below 19.5% is oxygen-deficient and can cause dizziness or unconsciousness, while rising above 23.5% makes the environment more fire-prone. So the range 19.5% to 23.5% is the standard for oxygen-safe levels.