CWI Code Book Application 2 — Questions and Answers
Question 1: When AWS D1.1 requires a prequalified WPS, which condition would disqualify it from prequalified status?
- Using a listed base metal in Table 3.1
- Exceeding the maximum interpass temperature for the process (Correct answer)
- Using a prequalified joint design within dimensional limits
- Employing a qualified welder for the specified process
Correct answer: Exceeding the maximum interpass temperature for the process
Exceeding the maximum interpass temperature specified in AWS D1.1 removes a WPS from prequalified status and requires qualification testing.
Question 2: Under AWS D1.1, what is the minimum preheat temperature required for ASTM A514 steel with thickness over 2½ inches when using SMAW?
- 50°F (10°C)
- 125°F (50°C)
- 200°F (95°C) (Correct answer)
- 225°F (107°C)
Correct answer: 200°F (95°C)
AWS D1.1 Table 3.2 requires a minimum preheat of 200°F (95°C) for A514 steel over 2½ inches thick when welded with SMAW.
Question 3: In AWS D1.1, what does the term 'essential variable' mean in the context of a WPS?
- A variable that, if changed, requires re-qualification of the WPS (Correct answer)
- A variable that must be recorded but can be freely changed
- A supplemental variable applicable only to CVN testing
- A variable listed in the welding procedure that is optional
Correct answer: A variable that, if changed, requires re-qualification of the WPS
An essential variable is one whose change beyond specified limits requires requalification of the welding procedure specification.
Question 4: Per AWS D1.1, a CJP groove weld in a T-joint subjected to tension perpendicular to its axis is classified as which joint category for inspection purposes?
- Category A
- Category B (Correct answer)
- Category C
- Category D
Correct answer: Category B
AWS D1.1 classifies CJP groove welds in T-joints and corner joints as Category B for NDT purposes.
Question 5: When using AWS D1.1 Table 6.1 for visual inspection of groove welds, what is the maximum allowable undercut depth for a statically loaded member in tension?
- 1/32 inch (0.8 mm)
- 1/16 inch (1.6 mm) (Correct answer)
- 3/32 inch (2.4 mm)
- 1/8 inch (3.2 mm)
Correct answer: 1/16 inch (1.6 mm)
AWS D1.1 Table 6.1 permits undercut not exceeding 1/16 inch (1.6 mm) for statically loaded members in tension.
Question 6: According to AWS D1.1, which of the following is NOT a required element of a Welding Procedure Specification (WPS)?
- Base metal specification and thickness range
- Welding process and type
- Welder qualification test results (Correct answer)
- Joint design and base metal preparation
Correct answer: Welder qualification test results
Welder qualification test results are documented on a Welder Performance Qualification Record (WPQR/PQR), not on the WPS itself.
Question 7: Under AWS D1.1, a groove weld tested by a bend test fails if any single open discontinuity exceeds what maximum dimension?
- 1/16 inch (1.6 mm)
- 1/8 inch (3.2 mm) (Correct answer)
- 3/16 inch (4.8 mm)
- 1/4 inch (6.4 mm)
Correct answer: 1/8 inch (3.2 mm)
AWS D1.1 requires bend test specimens to have no open discontinuity exceeding 1/8 inch (3.2 mm) in any direction.
CWI Code Book Application 2
When AWS D1.1 requires a prequalified WPS, which condition would disqualify it from prequalified status?