CWS Weld Procedure Specifications & Qualification 2 — Questions and Answers
Question 1: Who is responsible for ensuring that a WPS is properly prepared and available at the work site?
- The welder
- The welding inspector
- The manufacturer or contractor (Correct answer)
- The base metal supplier
Correct answer: The manufacturer or contractor
The manufacturer or contractor is responsible for preparing, qualifying, and making the WPS available at the job site.
Question 2: In the context of ASME Section IX, the term 'P-Number' is used to:
- Identify filler metal classifications
- Group base metals with similar weldability and properties (Correct answer)
- Define the welding process code
- Designate the preheat temperature required
Correct answer: Group base metals with similar weldability and properties
P-Numbers in ASME Section IX group base metals by similar composition, weldability, and mechanical properties to reduce the number of qualification tests.
Question 3: A Welding Procedure Specification must be signed by:
- The welder who will perform the work
- An authorized representative of the manufacturer or contractor (Correct answer)
- The third-party inspection agency
- The project owner or end client
Correct answer: An authorized representative of the manufacturer or contractor
The WPS must be signed and authorized by a representative of the organization responsible for the welding work.
Question 4: What test is commonly used to evaluate the mechanical properties of a groove weld during procedure qualification?
- Bend test (Correct answer)
- Charpy impact test
- Ferrite number test
- Magnetic particle test
Correct answer: Bend test
Bend tests (face, root, and side bends) are routinely required during groove weld procedure qualification to evaluate ductility and soundness.
Question 5: Under AWS D1.1, the maximum thickness a welder is qualified to weld is based on:
- The thickness of the test plate used during qualification (Correct answer)
- The design requirements of the project
- The type of welding process used
- The filler metal diameter used during testing
Correct answer: The thickness of the test plate used during qualification
Welder qualification thickness limits are determined by the thickness of the test assembly used during the qualification test.
Question 6: Which position qualifies a welder for the most positions under AWS D1.1 structural welding?
- 1G (flat)
- 2G (horizontal)
- 3G (vertical)
- 6G (inclined pipe) (Correct answer)
Correct answer: 6G (inclined pipe)
Passing the 6G inclined pipe test qualifies a welder for all positions because it encompasses the most demanding welding orientation.
Question 7: When preheat is listed as an essential variable on a WPS, what does changing the minimum preheat temperature require?
- Only a revision to the WPS document
- Requalification with a new PQR (Correct answer)
- Approval from the project owner only
- An updated welder certification
Correct answer: Requalification with a new PQR
If preheat is designated as an essential variable, decreasing it below the qualified minimum requires requalification supported by a new PQR.
CWS Weld Procedure Specifications & Qualification 2
Who is responsible for ensuring that a WPS is properly prepared and available at the work site?