Question

which respirator would be used where dust or solid particles might be inhaled?
full facepiece mask with chemical canisters
self - contained breathing apparatus
supplied air mask
half mask or mouthpiece with a mechanical filter

Explanation:

A half mask or mouthpiece with a mechanical filter is designed to filter out dust and solid particles. Chemical canisters in full facepiece masks are for chemical protection, self - contained breathing apparatuses are for environments with low oxygen or high - hazard gases, and supplied air masks are mainly for use in areas with contaminated air where a continuous air supply is needed.

Answer:

D. half mask or mouthpiece with a mechanical filter