Red Seal Welding Practice Exam 2025 – The All-In-One Guide to Exam Success!

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What is the most common problem that occurs with long arcing?

Overheating

Undersizing

Porosity

When welding, long arcing refers to extending the duration of the arc between the electrode and the base metal. This can result in porosity, which is the formation of small holes or pits in the welded metal. This occurs when gases such as oxygen and nitrogen become trapped in the weld pool, leading to weak and brittle welds. Option A, overheating, may also occur with long arcing but it is not the most common problem. Undersizing and cracking are not directly related to long arcing and can be caused by other factors such as welding technique and material properties. Therefore, option C, porosity, is the most common problem when using long arcing in welding.

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Cracking

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