The filtration efficacy of a protective mask should be at least:
A) 80% of 3 to 5 µm particles
B) 85% of 3 to 5 µm particles
C) 90% of 3 to 5 µm particles
D) 95% of 3 to 5 µm particles

Question

Quizplus · Accepted Answer

According to the Centers for Disease Control and Prevention (CDC), the filtration efficacy of a protective mask should be at least 95% of 0.3 µm particles. This is equivalent to 95% of 3 to 5 µm particles, which means option D is the correct choice.

The Filtration Efficacy of a Protective Mask Should Be at Least