10.2 Part C (Code Application) Exam Strategies
Key Takeaways
Part B (Practical) and Part C (Code) are both open book and both scored at 72% — speed and navigation, not memorization, win them
Part B uses molded replica specimens plus the inspection kit (fillet, Bridge-Cam, V-WAC, hi-lo gauges) judged against the Book of Specifications and Book of Exhibits — 46 questions in 2 hours
Part C tests applying a code (AWS D1.1, API 1104, or ASME Section IX) to look-up scenarios; tab every key table and figure
On Part B, measure exactly (leg, throat, reinforcement, undercut, convexity) and accept/reject ONLY against the Book of Specifications, never memory
On Part C, identify the clause/table first, navigate by tab, read the actual code text, and trust it — do not assume
Practice both with a timer: find any major reference or take any gauge reading in under 30 seconds
Part B (Practical) — Gauges, Replicas, and the Book of Specs
Part B is the hands-on, open-book practical part: 46 questions in 2 hours, passed at 72%. AWS provides everything — you do not bring tools. You inspect molded plastic replica weldments (groove plate, fillet/T-joint, and a pipe specimen) using a calibrated inspection tool kit, then accept or reject each feature strictly against the Book of Specifications, with supporting documents in the Book of Exhibits. The whole part is a discipline test: measure precisely, then compare to the written spec — never to memory or field habit.
The inspection kit and what each tool reads:
| Tool | Measures |
|---|---|
| Fillet weld gauge | Leg size and throat of fillet welds |
| Bridge-Cam gauge | Reinforcement, fillet leg, undercut depth, angle of preparation |
| V-WAC (undercut) gauge | Undercut depth and surface porosity sizing |
| Hi-Lo gauge | Internal misalignment (high-low) on pipe |
| Dial caliper / ruler / protractor | Lengths, thickness, groove angle |
| Magnifier, mirror, flashlight | Surface-flaw detection (cracks, porosity, overlap, IF) |
What you measure and judge per replica:
| Feature | Tool | Accept/reject basis |
|---|---|---|
| Fillet leg & throat | Fillet/Bridge-Cam | Book of Specifications min size |
| Reinforcement | Bridge-Cam | Max height per spec |
| Undercut | V-WAC/Bridge-Cam | Depth limit per spec |
| Convexity/concavity | Bridge-Cam | Profile limits |
| Cracks, porosity, overlap, IF | Visual + magnifier | Spec acceptance limits |
Part B traps: wrong gauge for the feature; reading the gauge from the wrong reference face; and — most common — judging by memory instead of the Book of Specifications. Always cite the spec line. Re-zero gauges, and report measured values to the precision the gauge allows.
Part C (Code Application) — Navigation Over Memory
Part C is open book against a chosen code — most candidates sit AWS D1.1 Structural Welding Code — Steel, but API 1104 (pipelines) and ASME Section IX are options. It is 50 scored questions plus pretest, and 72% passes. Because the code is in front of you, the exam tests how fast and accurately you can find and apply the right clause, table, or figure — not whether you memorized it.
Tab the code before exam day. A consistent color scheme turns a 90-second hunt into a 10-second flip:
| Tab | D1.1 reference | Content |
|---|---|---|
| Red | Table 5.3 | Approved base metals (groups) |
| Blue | Table 5.4 | Matching filler metals |
| Green | Table 5.8 | Minimum preheat / interpass |
| Yellow | Figure 5.1 | Prequalified CJP groove joints |
| Orange | Figure 5.2 | Prequalified PJP groove joints |
| Purple | Table 7.7 | Minimum fillet weld size |
| Pink | Table 8.1 | Visual acceptance criteria |
| Brown | Table 8.2 | UT acceptance criteria |
| Black | Clause 6 | Welder/WPS qualification |
Common Part C question types:
| Type | Approach |
|---|---|
| Table look-up (preheat, fillet size) | Identify metal group, then cross-read thickness row |
| Acceptance criteria | Table 8.1; pick statically vs cyclically loaded column |
| Prequalification check | Verify ALL Clause 5 conditions — one miss = not prequalified |
| Joint detail (root opening, angle) | Figures 5.1/5.2 by joint designation |
| Qualification range | Clause 6 tables — position, thickness, diameter limits |
| Repair/NDE timing | Clause 8 |
Memorize the structure, not the contents: which clause holds qualification, fabrication, and inspection. That mental map is what lets you go straight to the tab.
Open-Book Time Management and Step-by-Step Method
Both open-book parts pass at 72% and both reward a calm, repeatable routine. Time budgets:
| Part | Scored Q | Time | Pace | Pass |
|---|---|---|---|---|
| B (Practical) | 46 | 120 min | ~2.6 min/Q | 72% |
| C (Code) | 50 | ~120 min | ~2.4 min/Q | 72% |
That pace is generous only if your gauges and tabs are second nature. Build the habit now: set a timer and practice taking each gauge reading and finding each major table until both take under 30 seconds.
The six-step look-up loop (apply to every Part C item):
- Read the full question — pin down exactly what value or decision is asked.
- Identify the clause/table/figure needed (this is the make-or-break step).
- Navigate by tab — go straight to the reference.
- Read the actual code text/row — do not assume from memory.
- Match the answer to the code wording exactly.
- Move on — trust the code; do not second-guess.
Part C mistakes to avoid:
| Mistake | Prevention |
|---|---|
| Answering from memory | Always verify in the code, even when sure |
| Static vs cyclic mix-up | Re-read the loading condition before choosing the column |
| Boundary thickness error | Note "up to and including" vs "over" — equal values matter |
| Partial prequalification check | A WPS is prequalified only if EVERY condition is met |
| Time sink | If unfound in ~4 minutes, flag and move on |
Part B/C Readiness Checklist (Last Cram Pass)
- Take leg, throat, reinforcement, and undercut readings on a sample weld with the correct gauge, blind
- Practice accepting/rejecting a feature by citing a specific Book of Specifications line
- Confirm all code tabs are placed and labeled (5.3, 5.4, 5.8, 5.1, 5.2, 7.7, 8.1, 8.2, Clause 6)
- Time yourself finding any major table — target under 30 seconds
- Run the six-step look-up loop on 20 practice code questions
- Verify which code edition the exam allows and tab THAT edition only
- Plan to flag-and-return on any item exceeding ~4 minutes
For the exam: the single highest-payoff prep for both open-book parts is timed repetition — gauge readings for Part B, table navigation for Part C — until accuracy is automatic and speed is no longer a worry.
On Part B (Practical), what is the correct basis for accepting or rejecting a feature you measured on a replica weldment?
The acceptance limits in the Book of Specifications
Your field experience and best engineering judgment
The values memorized from AWS D1.1 Table 8.1
Whatever the proctor confirms during the exam
Why is fast code navigation the decisive skill on Part C rather than memorization?
Part C is closed book, so speed compensates for not memorizing
Part C is open book, so the test is finding and applying the right clause or table quickly
Part C only contains math problems that must be solved rapidly
Part C allows unlimited time, so accuracy alone matters
Approximately how much time per question do you have on Part C (50 scored questions in about 120 minutes)?
About 1 minute
About 4 minutes
About 2.4 minutes
About 6 minutes
Sections you finish are checked off in the contents.