Description should include determining
- the ventilation system and heating/cooling system in the work area
- the need for a personal breathing apparatus when welding in confined spaces or using fume extractors.
Process/Skill Questions:
- What is the welding lab's ventilation system? What are its components?
- Why should there always be a clean supply of fresh air available?
- Which welding jobs or circumstances would require one to use a personal breathing apparatus?