Which of the following can be used to ventilate a confined space?

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Multiple Choice

Which of the following can be used to ventilate a confined space?

Explanation:
Ventilation in a confined space means supplying a breathable atmosphere by introducing fresh air and removing contaminants. Air is the best medium for this because it provides the proper mix of gases and keeps oxygen levels within a safe range. Using only oxygen would raise oxygen concentration, increasing fire risk and other hazards. Using only nitrogen would displace oxygen and create a risk of asphyxiation. Using hydrogen introduces a flammable gas. Therefore, air is the appropriate and safe choice for ventilating a confined space.

Ventilation in a confined space means supplying a breathable atmosphere by introducing fresh air and removing contaminants. Air is the best medium for this because it provides the proper mix of gases and keeps oxygen levels within a safe range. Using only oxygen would raise oxygen concentration, increasing fire risk and other hazards. Using only nitrogen would displace oxygen and create a risk of asphyxiation. Using hydrogen introduces a flammable gas. Therefore, air is the appropriate and safe choice for ventilating a confined space.

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