What should be checked on a respirator before each use?

Before using a respirator, it is crucial to inspect it for any cracks or signs of wear. This is because the integrity of the respirator's materials is essential in ensuring that it can effectively filter out harmful substances and fit snugly against the face. If there are cracks, tears, or other forms of degradation, the respirator may not provide a proper seal, which can lead to contaminated air entering and compromising respiratory protection. Regular checks for wear help ensure that the equipment remains effective and safe to use throughout its intended lifespan.

The other options, while they may have their own importance in certain contexts, do not directly impact the immediate functionality and safety of the respirator before use. For instance, examining the volume of air capacity is not a typical inspection since respirators are generally rated for specific use rather than inspected for air capacity each time. The color of the straps is not relevant to the respirator’s effectiveness, and while the manufacturer label provides important information about the product, it doesn't directly affect the immediate performance or safety of the respirator on that day.