Welder U.S. Certification Exam Prep
750 practice questions across 6 full-length tests
Aligned to AWS welding processes and codes (D1.1, A2.4, A3.0)
Detailed answer explanations — not just an answer key
U.S. units and ASME / AWS standards throughout
The U.S. Welder certification and state licensing landscape is varied. Most state license exams and journey-level NCCER assessments cover the same core welding theory: processes, metallurgy, codes, distortion, defects, and safety. This book gives you a unified prep against that core content. The domains below reflect the typical content split across AWS-aligned U.S. exams. Our book follows the same structure so your study time matches the assessment.
| Knowledge Domain / Major Work Activity | Number of Questions |
|---|---|
| Safety, PPE and OSHA welding requirements
Welding symbols and blueprint reading (AWS A2.4) SMAW (stick) processes and electrodes GMAW / FCAW / MCAW processes and shielding gases GTAW (TIG) processes and applications Metallurgy, heat treatment and HAZ effects Welding codes (AWS D1.1, ASME Section IX) Defects, inspection methods, and distortion control | 12% 10% 16% 16% 12% 10% 12% 12% 100% |
Source: AWS welding curriculum and U.S. journey-level welding exam blueprints. This is a study aid. Red Seal Training Academy is not affiliated with the American Welding Society, NCCER or any state licensing authority.
Which Path Are You On?
Apprentice writing the journey-level exam
You are finishing your welding apprenticeship and getting ready for the written journey-level assessment. Use our 6 full-length tests to drill welding theory under exam conditions.
Field welder writing for state licensure
You hold field experience and need to pass a state welding license theory exam to work in jurisdictions like California, Florida, Texas, or any state with a written component. Our book covers AWS-aligned theory across all major processes.
Re-testing after a previous attempt
If your last attempt did not go the way you wanted, use our detailed answer explanations to fix the knowledge gaps, not just memorize answers. Every question in the book has a written explanation.
Try 3 Free Sample Questions
One question of each type you will see on the real exam. Scroll to see the answer and explanation.
What does the second-from-last digit in the AWS classification E7018 represent?
A. Tensile strength of the deposited metal
B. Welding position (e.g., flat, all-position)
C. Coating type and current
D. Diameter of the electrode
Answer: B
Explanation:
In the AWS A5.1 classification (Exxyy), the second-from-last digit (the ‘1’ in E7018) indicates welding position. ‘1’ means all-position. ‘2’ means flat and horizontal fillet only. ‘4’ means flat, horizontal, vertical-down, and overhead. The first two digits are tensile strength (70 = 70 ksi). The last digit (8) indicates coating type and current — low-hydrogen, iron-powder, AC or DC.
When TIG welding 1/4 inch aluminum, what current type and polarity should be used?
A. DCEN (DC, electrode negative)
B. DCEP (DC, electrode positive)
C. AC with high frequency
D. DC pulsed at 50% duty cycle
Answer: C
Explanation:
GTAW (TIG) on aluminum uses AC with high frequency. The positive half-cycle provides cleaning action that breaks up the aluminum oxide layer. The negative half-cycle puts heat into the base metal. DCEN is used for steel and stainless. DCEP is rarely used in TIG because the tungsten electrode overheats. Modern inverter TIG machines often allow square-wave AC with adjustable balance for more precise oxide cleaning.
A multi-pass GMAW weld on 1/2 inch carbon steel is showing porosity in only the second and third passes, but not in the root pass. The shielding gas, wire and machine settings have not changed. What is the most likely cause?
A. Defective shielding gas regulator
B. Slag from the previous pass not removed before the next pass
C. Wire feed speed too high
D. Travel speed too slow on the cap pass only
Answer: B
Explanation:
GMAW uses solid or metal-cored wire with a gas shield, and although it does not produce slag like SMAW, residual oxidation from a previous pass can cause porosity in the next. More likely on a multi-pass weld is that the welder is laying GMAW over a previous pass that was actually FCAW (slag-producing) — or that mill scale, oil, or moisture is on the joint between passes. Either way, the fix is interpass cleaning. Settings are confirmed unchanged, so the issue is in the joint preparation between passes.
Our book has 750 questions like these, with an explanation for every one.
Welder (USA) AWS Exam — Frequently Asked Questions
What is the U.S. welding certification process?
There is no single national U.S. welding certification. The most common pathways are: AWS Certified Welder (a procedure-qualified individual ticket administered by the American Welding Society), NCCER Welding Journey-Level Assessment (used in merit-shop construction), state welding license exams (in jurisdictions like California, Florida, Texas), and union welder qualifications under AWS D1.1, ASME Section IX, or API 1104. Most jobs require both a written knowledge exam and a practical welded coupon test.
What code books should I know for the exam?
AWS D1.1 (Structural Welding Code — Steel) is the most common reference. Pressure work uses ASME Section IX. Pipeline work uses API 1104. Sheet metal uses AWS D1.3. Most state welding theory exams test general AWS principles and welding theory rather than specific codes.
How many questions are on a typical written welding theory exam?
Length varies by jurisdiction. NCCER Journey-Level Welding Assessment is approximately 100-140 multiple-choice questions. State written exams are typically 50-100 questions. AWS Certified Welder programs do not include a written exam — only the welded coupon. Confirm with the issuing body.
Most NCCER and union local exams require 70% to pass. Some locals require higher scores on welding-specific sections. Confirm with your training director or Accredited Assessment Center.
What is the difference between AWS Certified Welder and NCCER Journey Welder?
AWS Certified Welder is a procedure-specific ticket — you pass a welded coupon to a specific WPS (Welding Procedure Specification) and your ticket says you are qualified on that procedure. NCCER Journey Welder is a broader credential covering the four-level NCCER curriculum and a journey-level assessment. Many welders hold both.
Do welding certifications expire?
Yes. AWS procedure tickets expire if you do not perform that process at least once in a 6-month period. To maintain the ticket you must keep weld logs and submit them periodically. NCCER credentials do not expire. State licenses follow state rules.
Can I take the exam without formal training?
For NCCER Journey-Level: yes, with documented field experience and an Accredited Assessment Center. For state license: typically yes, but practical exam costs and pass rates suggest formal training is highly recommended. For AWS Certified Welder: open to anyone — you just need to pass the welded coupon.