Which item is primarily worn to protect a welder's head and hair?

The item primarily worn to protect a welder's head and hair is a cap. In welding, safety is a top priority, and protective gear is essential to prevent injuries from sparks, heat, and UV radiation. While a helmet is crucial for shielding the face and neck from radiant heat and sparks, it typically functions as a full protective device with a face shield or lens but does not primarily serve to protect the head and hair.

A cap, often made of flame-resistant materials, serves as a basic layer of protection for a welder’s scalp and hair from spatter and heat during the welding process. It can help keep hair out of the way while providing a barrier against contamination and potential burns from hot metal fragments.

Other options like a bald cap and bandana do not offer the appropriate level of protection needed in a welding environment. A bald cap is not suitable for this setting, as it does not provide the necessary safeguarding from heat or sparks. A bandana, while it may offer some minimal protection, typically lacks the flame-resistant qualities required in welding applications. Therefore, a cap is the most suitable answer for protecting the head and hair specifically in the context of welding safety.