Answer :
Final answer:
When welding on a base metal with paint residue, the best protection is a b)respirator mask to prevent inhalation of harmful chemicals released by the heated paint.
Explanation:
The best protection when welding on a base metal with paint residue on the backside is a respirator mask. The welder's gloves and helmet primarily protect against the intense heat and light of the electric arc during welding. However, when dealing with potential fumes from paint residue, which could release toxic chemicals upon heating, the priority is respiratory protection. Paint and coatings can generate harmful gases when subjected to the high temperatures of welding, so adequate ventilation and the use of a respirator designed to filter harmful particulates and gases are crucial. This ensures the welder does not inhale any hazardous substances that might be released during the welding process.
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