Methane can cause dizziness and unconsciousness in confined spaces due to displacement of which gas?

Methane can cause dizziness and unconsciousness in confined spaces due to displacement of which gas?

• A. Oxygen
• B. Nitrogen
• C. Carbon dioxide
• D. Hydrogen

Answer: (A)

In a confined space, the danger from methane comes from reducing the amount of breathable oxygen in the air. Methane isn’t toxic; it simply displaces oxygen, lowering its concentration. When oxygen levels fall, the body doesn’t get enough oxygen (hypoxia), leading first to dizziness and possibly progressing to fainting or unconsciousness as the deficiency worsens. So the gas being displaced is oxygen. Proper ventilation and monitoring are essential in confined spaces to maintain adequate oxygen levels.

In a confined space, the danger from methane comes from reducing the amount of breathable oxygen in the air. Methane isn’t toxic; it simply displaces oxygen, lowering its concentration. When oxygen levels fall, the body doesn’t get enough oxygen (hypoxia), leading first to dizziness and possibly progressing to fainting or unconsciousness as the deficiency worsens. So the gas being displaced is oxygen. Proper ventilation and monitoring are essential in confined spaces to maintain adequate oxygen levels.