What Do You Learn in a Welding Course? Quick Answer A professional welding course teaches far more than how to melt two pieces of metal together. Learners are normally introduced to three connected areas: Welding theorySafety, terminology, equipment, materials, electricity, welding processes, joint design, consumables, drawings, welding positions, defects and quality requirements. Practical workshop trainingPPE, equipment inspection, cutting, grinding, joint preparation, mach