Can non-flammable gases be used in confined spaces?

Non-flammable gases can indeed be used in confined spaces, but only with the necessary precautions such as appropriate ventilation and monitoring. This is crucial because even non-flammable gases can displace oxygen or create other hazardous conditions in confined spaces. For example, if there is insufficient ventilation, the levels of oxygen can drop to dangerous levels, posing a risk of asphyxiation for personnel working in those areas. Additionally, monitoring ensures that personnel are aware of any changes in gas concentration, which provides an extra layer of safety.

The other options do not address the inherent risks associated with working in confined spaces. Using non-flammable gases without any precautions fails to recognize the potential for oxygen depletion, while suggesting that lighting conditions can mitigate risks ignores the dynamics of gas behavior in confined areas. Furthermore, stating that non-flammable gases can always cause an explosion is inaccurate, as these gases do not present an explosive hazard in the same way flammable gases do, but rather, the focus should be on the appropriate safety measures that must always be followed.