What type of respirator is rated to be resistant for one shift?

The R-rated respirator is designed specifically to be resistant to certain types of aerosols for a particular duration, typically up to one shift. The "R" in R-rated indicates that the respirator is resistant to oil, which means it can be used in environments where oil-based particulates are present. This characteristic makes it suitable for use for a limited time period, typically not exceeding eight hours, which aligns with the concept of a single shift in workplaces.

In contrast, N-rated respirators are not resistant to oil and are generally used in environments where oil aerosols are not a concern. P-rated respirators offer a higher level of protection as they are also resistant to oil but are designed to last longer than R-rated respirators, providing a more robust solution for sustained use. Since the question specifically inquires about a respirator rated for use during one shift, the R-rated respirator is the correct choice.