All types of welding produce radiation, but some generate more than others. In general, the most dangerous types of applications are:

• A. TIG and MIG processes
• B. Stick welding
• C. Gas welding
• D. Flux-cored arc welding

Answer: (A)

Radiation in welding comes from the arc or flame, and how dangerous it is depends on how intense and how long that radiant energy is present. The strongest, most direct exposure comes from electric arcs, especially when the arc is sustained and concentrated. TIG and MIG welding create such arcs: they deliver high energy density and are often used close to the work, meaning you’re exposed to bright UV and IR radiation for longer periods. Gas welding relies on a flame, which does emit heat and some UV, but the intensity and exposure from the flame are generally less than the intense arc radiation you get with TIG or MIG. Stick welding and flux-cored arc welding also produce arc radiation, but the typical exposure profile for TIG and MIG—continuous, bright arcs in close proximity—tends to pose greater radiant hazards on average. So, in general, TIG and MIG processes are considered the more dangerous in terms of radiation exposure.