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If a hard hat must be worn while welding, what attachment must also be worn on the hat?

1. Goggles
2. Earplugs
3. Face shield
4. Respirator

Answer :

Final answer:

While welding with a hard hat, a face shield must be worn to protect against intense thermal energy and electromagnetic radiation that can burn the retina and damage the skin.

Explanation:

If a hard hat must be worn while welding, the attachment that must also be worn on the hat is a face shield. The face shield helps to protect the welder from the intense thermal energy and high-energy electromagnetic radiation emitted by the electric arc during the welding process. This radiation can burn the retina of an unprotected eye and the thermal energy can be felt even a few meters away. Therefore, in addition to using welder's gloves and a helmet, a face shield is essential to prevent eye and face injuries.

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