Certified Welder Welding Codes and Standards 3 — Questions and Answers
Question 1: What is the purpose of the AWS D1.5 Bridge Welding Code?
- Governing welds on offshore platforms
- Governing structural welds on highway bridges (Correct answer)
- Governing pipeline welds
- Governing pressure vessel welds
Correct answer: Governing structural welds on highway bridges
AWS D1.5 is the Bridge Welding Code developed with AASHTO to govern structural welds in highway bridge fabrication.
Question 2: According to ASME Section IX, what is a 'supplementary essential variable'?
- A variable that never requires requalification
- A variable that requires requalification only when impact testing is required (Correct answer)
- A variable that replaces an essential variable
- A variable only applicable to brazing procedures
Correct answer: A variable that requires requalification only when impact testing is required
Supplementary essential variables become essential (requiring requalification) only when the application code requires Charpy impact testing.
Question 3: Under AWS D1.1, what is the maximum allowable undercut for statically loaded structures in a transverse weld?
- 1/32 inch (0.8 mm) (Correct answer)
- 1/16 inch (1.6 mm)
- 3/32 inch (2.4 mm)
- 1/8 inch (3.2 mm)
Correct answer: 1/32 inch (0.8 mm)
AWS D1.1 limits undercut to 1/32 inch for welds transverse to the primary stress direction in statically loaded structures.
Question 4: What API standard governs the welding of pipelines and related facilities in the oil and gas industry?
- API 1104 (Correct answer)
- API 650
- API 620
- API 510
Correct answer: API 1104
API 1104 is the standard for welding of pipelines and related facilities used in the petroleum and natural gas industries.
Question 5: In AWS D1.1, a 'prequalified' WPS means:
- The procedure has been approved by the AWS
- The procedure meets all listed conditions and does not require a PQR (Correct answer)
- The procedure was tested at a certified lab
- The procedure is valid for unlimited base metal thicknesses
Correct answer: The procedure meets all listed conditions and does not require a PQR
Prequalified WPSs meet all conditions specified in AWS D1.1 Clause 3 and are exempt from procedure qualification testing.
Question 6: Which organization publishes the standard AWS A5.1, covering carbon steel electrodes for SMAW?
- ASME
- OSHA
- American Welding Society (Correct answer)
- American National Standards Institute
Correct answer: American Welding Society
AWS A5.1 is published by the American Welding Society and classifies carbon steel covered electrodes for shielded metal arc welding.
Question 7: Under ASME Section IX, the letter 'P' in the P-number system is used to:
- Identify the welding process
- Group base metals with similar welding characteristics (Correct answer)
- Designate the filler metal classification
- Indicate the preheat requirement
Correct answer: Group base metals with similar welding characteristics
P-numbers group base metals with similar weldability so that qualification on one material covers others in the same group.
Certified Welder Welding Codes and Standards 3
What is the purpose of the AWS D1.5 Bridge Welding Code?