Shielded Metal Arc Welding (SMAW) HT A School Practice Test 2025 - Free SMAW Exam Practice Questions and Study Guide

The welding arc in Shielded Metal Arc Welding (SMAW) is initiated by striking the electrode against the workpiece. This action creates a short circuit, which generates a high current that melts the tip of the electrode and initiates the arc. The electrical energy flows from the electrode to the workpiece, establishing the arc that is crucial for the welding process.

The process of striking the electrode is akin to striking a match to create a flame. The contact ensures a brief but intense heat that allows the electrode coating to ignite and produce the arc. This method is effective because it allows for control over the arc initiation, helping to create a stable arc once it is established.

Considering the incorrect options, simply connecting the electrode to the power source does not create an arc because there needs to be a difference in potential which is achieved through the striking action. Using a lighter flame is not applicable in SMAW, as this process relies on electrical arcs rather than flame-based combustion. Maintaining continuous contact with the electrode would not initiate an arc but would rather ground it without establishing the necessary conditions for an effective welding operation.