A person in a confined space will consume approximately how much air per hour?

• A. 1.0 m³/hour
• B. 0.50 m³/hour
• C. 0.75 m³/hour
• D. 1.5 m³/hour

Answer: (C)

The average consumption of air by a person in a confined space is typically estimated to be around 0.75 cubic meters per hour. This figure is based on the average metabolic activity of a resting adult, who breathes at a rate that leads to a certain volume of air intake. Understanding this metric is crucial in the context of confined spaces, as it informs safety procedures related to ventilation and the potential for hazardous environments.

In forms of work or areas where multiple individuals may be present, estimating air consumption becomes essential for ensuring that adequate breathable air is available, reducing the risk of suffocation or exposure to toxic gases. Proper ventilation systems should be designed and implemented according to the expected number of occupants and this air consumption rate to maintain a safe working environment.

The other options reflect varying rates, but none align closely with the accepted average figure for a resting adult in a confined space. This highlights the importance of using accurate metrics for effective safety planning and risk assessment.