Michigan Residential Builders License Practice Test

According to Silica Standards, what level of respiratory protection is required when using a handheld power saw indoors?

1. APF 5 minimum

2. APF 10 minimum

3. APF 15 minimum

4. APF 20 minimum

The correct answer is: APF 10 minimum

The correct choice is based on the Acceptable Protection Factors (APF) specified in the Silica Standards to ensure adequate respiratory protection when performing tasks that generate silica dust, such as using a handheld power saw indoors. An APF of 10 means that the respirator will reduce the inhalation exposure by a factor of 10 compared to not wearing any protection. This level of protection is considered appropriate for activities that involve moderate silica exposure, where it is vital to minimize the risk of inhaling harmful dust. Indoor use of a handheld power saw typically results in a confined space where dust can accumulate and respiratory protection is crucial. Ensuring that workers are equipped with the proper level of respiratory protection not only complies with health and safety regulations but also safeguards their long-term health against conditions such as silicosis and other respiratory diseases associated with silica exposure.