Which statement about N100 respirators is accurate?

Which statement about N100 respirators is accurate?

• A. It filters at least 99.97% of airborne particles and is oil resistant
• B. It filters at least 99.97% of airborne particles and is not oil resistant
• C. It filters at least 95% of airborne particles and is not oil resistant
• D. It filters at least 99% of airborne particles and is oil resistant

Answer: (B)

N100 respirators are defined by two things: the N means not resistant to oil, and the 100 means they must filter at least 99.97% of airborne particles at the most penetrating particle size (about 0.3 microns) in standard tests. So the statement that best fits is that it filters at least 99.97% of airborne particles and is not oil resistant. The oil-resistance part distinguishes N from R (somewhat oil resistant) and P (oil proof) types, which is why any option claiming oil resistance isn’t correct for N100. Also, the minimum filtration efficiency for N100 is 99.97%, not 95% or 99%.

N100 respirators are defined by two things: the N means not resistant to oil, and the 100 means they must filter at least 99.97% of airborne particles at the most penetrating particle size (about 0.3 microns) in standard tests. So the statement that best fits is that it filters at least 99.97% of airborne particles and is not oil resistant. The oil-resistance part distinguishes N from R (somewhat oil resistant) and P (oil proof) types, which is why any option claiming oil resistance isn’t correct for N100. Also, the minimum filtration efficiency for N100 is 99.97%, not 95% or 99%.