TheoryWelding Inspector CWI Study Guide
Study for the Welding Inspector CWI with exam topics, practice questions, a free PDF, video walkthrough and timed mock exam links.
How to study for Welding Inspector CWI
- Read the topic list so you know what the exam is likely to cover.
- Answer the free practice questions and read every explanation.
- Download the PDF for offline review.
- Use timed mock exams when your untimed practice feels comfortable.
Topics to review
- Core formulas and field calculations
- Codes, standards and compliance
- Safe work practices and PPE
- Tools, materials and on-site reference
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Q1AWS D1.1 is the primary structural welding code that governs welding of what base material?
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✓ Correct answer: Steel
AWS D1.1 is titled 'Structural Welding Code – Steel' and covers the welding of steel structures. Other AWS codes address aluminum (D1.2) and stainless steel (D1.6).
Q2AWS D1.1 applies to structures with a base metal minimum thickness of:
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✓ Correct answer: 3/16 in (4.8 mm)
AWS D1.1 generally applies to structural steel 3/16 in (4.8 mm) and thicker. Thinner material falls under sheet-metal or other codes such as AWS D1.3.
Q3A prequalified WPS under AWS D1.1 does NOT require:
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✓ Correct answer: Qualification testing (procedure qualification)
Prequalified WPSs comply with all AWS D1.1 prequalification requirements and therefore do not require procedure qualification testing. They still must be documented in writing with all essential variables.
Q4Which of the following welding processes is listed as prequalified in AWS D1.1?
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✓ Correct answer: Submerged arc welding (SAW)
SAW is listed as a prequalified process in AWS D1.1. GTAW and PAW are not prequalified under D1.1. ESW requires qualification testing.
Q5For prequalified fillet welds using SMAW under AWS D1.1, the maximum size of a single-pass fillet weld in the flat or overhead position is:
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✓ Correct answer: 1/4 in (6.4 mm)
AWS D1.1 limits single-pass SMAW fillet welds in the flat (1F) and overhead (4F) positions to 1/4 in (6.4 mm) maximum. The 5/16 in limit applies to the horizontal position. Exceeding these sizes requires multiple passes.
Q6Under AWS D1.1, which condition would disqualify a joint from being prequalified?
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✓ Correct answer: Using a joint configuration not listed in the D1.1 prequalified joint details
Only joint configurations explicitly listed in AWS D1.1's prequalified details may be used without qualification testing. Any deviation — such as a non-listed geometry or dimension — requires procedure qualification by testing.
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