Which of the following is a crucial consideration when selecting a respirator?

When selecting a respirator, understanding the degree of hazard associated with the toxic substance is crucial because this directly informs the type and level of protection needed. Different respirators are designed to filter out specific particulates, vapors, and gases, making it essential to match the respirator to the specific hazards present in the work environment.

For instance, if dealing with highly toxic substances, a respirator with a higher protection factor, such as a full-face respirator with chemical cartridges, may be required. Alternatively, if the substances involved are less hazardous, a simpler particulate respirator could suffice. Assessing the hazard level ensures that workers are equipped with adequate protection to avoid illnesses or injuries that could arise from inhalation of harmful substances.

Other considerations such as the size of the respirator, its price, or even its color do not influence its effectiveness in protecting against hazardous materials.