AWS AWS Joint Design & Weld Symbols 4 — Questions and Answers
Question 1: On a welding symbol, where is the reference line located?
- Attached to the arrow
- Above the tail
- Horizontally drawn, to which all other symbol elements attach (Correct answer)
- Inside the weld symbol circle
Correct answer: Horizontally drawn, to which all other symbol elements attach
The reference line is the horizontal baseline of the welding symbol to which the arrow, tail, and all weld symbols are attached.
Question 2: What does a weld symbol placed BELOW the reference line indicate?
- Weld on the other side of the joint
- Weld on the arrow side of the joint (Correct answer)
- Field weld required
- Weld all around required
Correct answer: Weld on the arrow side of the joint
A weld symbol placed below the reference line means the weld is to be made on the arrow side of the joint.
Question 3: Which joint type is most commonly used when welding two plates end-to-end in the same plane?
- T-joint
- Corner joint
- Butt joint (Correct answer)
- Lap joint
Correct answer: Butt joint
A butt joint joins two members lying in the same plane with their edges meeting.
Question 4: A 'melt-through' symbol on a welding symbol indicates that:
- The welder burned through the base metal accidentally
- Complete joint penetration from one side is required (Correct answer)
- The root must be back-gouged
- A backing bar must be used
Correct answer: Complete joint penetration from one side is required
The melt-through symbol (a filled circle on the reference line opposite side) specifies that complete fusion and penetration from one side is required.
Question 5: In AWS welding symbols, what does the number to the LEFT of a fillet weld symbol represent?
- Weld length
- Root opening
- Number of welds
- Weld size (leg length) (Correct answer)
Correct answer: Weld size (leg length)
The number to the left of a fillet weld symbol indicates the weld size, which is the leg length of the fillet weld.
Question 6: What type of groove weld has only one beveled member and is shaped like the letter 'J'?
- V-groove
- U-groove
- J-groove (Correct answer)
- Bevel groove
Correct answer: J-groove
A J-groove weld has a curved groove on one member only, shaped like the letter 'J'.
Question 7: When a welding symbol shows dimensions on BOTH sides of the reference line, what does this mean?
- The weld must be inspected twice
- Welds are required on both the arrow side and the other side (Correct answer)
- Alternate welding passes are required
- The joint needs preheat and post-heat
Correct answer: Welds are required on both the arrow side and the other side
Symbols on both sides of the reference line indicate that welds are to be made on both the arrow side and the other side of the joint.
AWS AWS Joint Design & Weld Symbols 4
On a welding symbol, where is the reference line located?