Final answer:
Before donning the respirator, inspect the neckstrap, headband, facepiece, inhalation, and exhalation valves for any damage.
Explanation:
All of the above should be checked:
- Inspect the neckstrap, headband, and adjustors for elasticity, breaks, tears, and proper functioning.
- Check the facepiece for dirt, cracks, tears, or holes.
- Examine inhalation and exhalation valves for cracks, tears, and dirt.
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