🔍 Key Concepts

• Slag inclusion causes in arc welding of a single-V butt joint • Effect of cleaning between passes in multi-pass welds • How rod angle and current setting usually affect penetration vs. slag entrapment

💭 Think About

• In a multi-pass weld on a single-V butt joint, where does slag tend to get trapped, and what action by the welder prevents it from being trapped? • Which factor most directly controls whether slag remaining from the previous bead stays in the joint or is removed before the next pass? • Between current setting, rod angle, and inter-pass work, which one is most about removing contaminants rather than shaping the arc or penetration?

✅ Before You Answer

• Identify what slag is and when it forms during the weld process. • Consider what must be done between passes on a multi-pass weld to prepare the joint for the next bead. • Ask: Which option deals specifically with removing existing slag rather than changing heat input or electrode position?