AWS Certified Welding Inspector (CWI) — All Questions

In the open-book Part C exam, the single most important skill for answering questions efficiently is:

• a.Guessing based on general welding experience without opening the code
• b.Memorizing every value so the book is never opened
• c.Reading each clause aloud to other candidates
• d.Quickly navigating the code's table of contents, index, and clause structure to locate the exact requirement✓

Part C is open-book, so success depends less on memorization and more on efficiently finding the governing clause, table, or figure using the code's table of contents and index. The exam rewards candidates who know how the document is organized and can locate and correctly apply the relevant requirement under time pressure. Guessing from experience risks missing code-specific values.

A Welding Procedure Specification (WPS) is best described as:

• a.A supplier's invoice for filler metal
• b.A drawing showing only the building's dimensions
• c.A record of a welder's personal certification test only
• d.A written document providing direction to the welder for making production welds in accordance with code requirements✓

A WPS is the written qualified procedure that tells the welder the essential variables (process, filler, joint design, preheat, current, etc.) for producing a code-compliant weld. It provides direction for production welding and is supported by a PQR that proves those parameters produce sound welds. It is not a personal certification, an invoice, or a structural drawing.

What is the primary relationship between a Procedure Qualification Record (PQR) and a Welding Procedure Specification (WPS)?

• a.The PQR lists only the paint color of the finished structure
• b.The PQR documents the actual test results and data used to qualify and support the WPS✓
• c.The PQR replaces the WPS once welding begins
• d.The WPS and PQR are unrelated documents

A PQR records the actual welding variables used to weld a test coupon and the results of the mechanical tests performed on it, demonstrating that the procedure produces sound, code-compliant welds. The WPS is then written and supported by that qualifying evidence. In short, the PQR proves it worked, and the WPS tells the welder how to repeat it. They are directly linked, not independent.

When a Part C question asks whether a particular weld is acceptable, the inspector should base the decision on:

• a.Personal preference about how the weld looks
• b.The first number that appears in the code, regardless of context
• c.The acceptance criteria specified in the applicable code for that weld type and loading condition✓
• d.The most conservative value found anywhere on the internet

Acceptance decisions must come from the acceptance criteria of the applicable code, matched to the correct weld type (e.g., fillet vs. groove) and loading condition (statically vs. cyclically loaded), because criteria can differ between them. The inspector must locate the correct clause or table rather than grabbing the first number or relying on opinion. Reading the context that governs which criteria apply is essential.

Why do many welding codes distinguish acceptance criteria for statically loaded versus cyclically loaded (fatigue) connections?

• a.Cyclically loaded members are more sensitive to stress risers, so their acceptance criteria for discontinuities are generally more stringent✓
• b.The distinction only affects the paint specification
• c.Statically loaded members never require any inspection
• d.Cyclic loading always uses a completely different metal

Members subject to repeated (cyclic) loading are prone to fatigue cracking that initiates at stress risers such as undercut, weld toes, or surface discontinuities. Codes therefore apply tighter acceptance limits for cyclically loaded connections than for statically loaded ones. Recognizing the loading condition tells the inspector which set of criteria to apply, which is a common Part C decision point.

If a Part C question refers to a defined term (for example, a specific weld feature) whose meaning affects the answer, the best practice is to:

• a.Ignore the term and answer from general knowledge
• b.Assume the everyday dictionary meaning of the word
• c.Substitute a similar term from a different code
• d.Look up the term in the code's definitions section to apply the exact meaning intended by the code✓

Codes contain a definitions/terminology section because terms often have precise technical meanings that differ from everyday usage and that determine which requirement applies. Confirming the code's own definition prevents misapplying a clause. Mixing terms from another code or using casual meanings can lead to the wrong acceptance decision. Precise reading of defined terms is a core open-book code skill.