Answer:
1. Weld all aroundis a circle drawn on the welding symbol, indicating that the described weld is to be made all around the part.
2. Field weld symbolis a symbol added to the basic AWS welding symbol to indicate that a weld is to be made at the job site (“ in the field”), rather than in a fabricating shop.
3. Melt throughis a complete joint penetration for a joint welded from one side and visible root reinforcement is produced.
4. Backing symbolis an open rectangular box used in combination with a groove weld symbol located on the reference line indicating that locating materials is required on the opposite side control penetration.
5. Spacersymbol is an open box that intersects the reference line, indicating that a spacer is placed between joint.
