What are the key differences between UV and IR hazards in welding, and how can you protect workers?

• A. UV hazards are not a concern if you wear gloves.
• B. UV hazards cause arc eye and skin burns; IR hazards cause thermal injuries; protect with appropriate shade, PPE, and ventilation.
• C. IR hazards cause only color changes in the weld.
• D. UV hazards cause only overheating of equipment.

Answer: (B)

UV radiation from the welding arc can burn skin and injure eyes (arc eye), while infrared radiation mainly adds heat, posing a risk of thermal burns and heat stress. Protect workers by using the correct shade on the welding helmet to reduce both UV and IR exposure, wearing proper PPE such as flame-resistant clothing and gloves, and providing good ventilation to cool the area and control fumes.