Explain why a part must be cleaned before repair or maintenance welding can be performed.
What will be an ideal response?
It is never safe to weld on any part that has not been cleaned before welding. All surface contamination must be removed before welding to prevent the possibility of injuring your health from exposure to materials released during welding. Some chemicals can be completely safe until they are exposed to the welding. The smoke or fumes they produce can be an irritant to the skin or eyes; it can be absorbed through the skin or lungs. If you are exposed to an unknown contamination, get professional help immediately.
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Fill in the blank(s) with correct word
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