OSHA has released a respirator safety training video. Run length is 9-10 minutes. There is also a video available from OSHA discussing the differences between masks and respirators. It is geared to the medical industry, but could be a valuable tool to answer the question, "why is this a respirator and not a dust mask?" Both videos can also be viewed at the DOL U-Tube channel.
More information can be found at OSHA's safety and health topics page.
The OSHA standard can be found here.
8 years ago