If a confined space has an oxygen content of 20.9%, what can you infer?

If a confined space has an oxygen content of 20.9%, what can you infer?

• A. Oxygen content is too high to enter
• B. Oxygen content is too low to enter
• C. Confined space is safe to enter
• D. The oxygen content must always be 10%

Answer: (C)

The oxygen content in the air is generally considered safe for human breathing at approximately 20.9%. This is comparable to the normal atmospheric oxygen concentration at sea level. When a confined space has an oxygen level of 20.9%, it is indicative that the environment does not present any immediate risks related to oxygen deficiency, as it lies within the acceptable range for safe breathing conditions. Higher or lower oxygen levels can pose significant health risks. Levels below approximately 19.5% could potentially lead to asphyxiation, while levels above around 23.5% may present a fire hazard. Thus, the oxygen content being at 20.9% signifies a breathable atmosphere that falls within safety guidelines. The notion that oxygen content could be too high or low to enter is unfounded in this context, as the levels stated do not deviate from those deemed healthy. Likewise, stating that the oxygen content must always be 10% is incorrect, as it does not pertain to established safety standards or normal atmospheric conditions.

The oxygen content in the air is generally considered safe for human breathing at approximately 20.9%. This is comparable to the normal atmospheric oxygen concentration at sea level. When a confined space has an oxygen level of 20.9%, it is indicative that the environment does not present any immediate risks related to oxygen deficiency, as it lies within the acceptable range for safe breathing conditions.

Higher or lower oxygen levels can pose significant health risks. Levels below approximately 19.5% could potentially lead to asphyxiation, while levels above around 23.5% may present a fire hazard. Thus, the oxygen content being at 20.9% signifies a breathable atmosphere that falls within safety guidelines.

The notion that oxygen content could be too high or low to enter is unfounded in this context, as the levels stated do not deviate from those deemed healthy. Likewise, stating that the oxygen content must always be 10% is incorrect, as it does not pertain to established safety standards or normal atmospheric conditions.