What are four factors that can prevent cold lap and slag inclusions?

Four factors that can help prevent cold lap and slag inclusions in welding are:

1. Proper Surface Preparation: Ensuring that the base materials are clean and free from contaminants like rust, oil, or moisture can minimize the risk of inclusions.
2. Correct Welding Parameters: Using appropriate heat settings, travel speeds, and electrode angles helps achieve proper fusion and prevents undercutting or incomplete penetration.
3. Welding Technique: Employing the right technique, such as maintaining a consistent arc length and using proper weaving patterns, can enhance weld quality and reduce defects.
4. Use of Filler Material: Selecting the appropriate filler material and ensuring it is free from impurities also plays a crucial role in preventing inclusions during the welding process.