Welding Symbols Certification

The Welding Symbols Certification is a free intermediate-level, 20-minute skill test from Science of Apps. It tests reading welding symbols on drawings — symbol structure and placement, fillet, plug, slot and spot welds, groove weld symbols and dimensions, and supplementary symbols, finishes, NDE and ISO differences — written to AWS A2.4:2020 Standard Symbols for Welding, Brazing and Nondestructive Examination and ISO 2553:2019 for 2026. Score 70% or more on its 20 questions to earn a verifiable Welding Symbols Proficiency certificate (SOA-WS). Every question is based on published standards and research — including AWS A2.4:2020 Standard Symbols for Welding, Brazing, and Nondestructive Examination (American Welding Society), ISO 2553:2019 Welding and allied processes – Symbolic representation on drawings – Welded joints (ISO) — and each answer is explained with its source.

Science of Apps offers a free Welding Symbols Certification, updated for 2026 and 2027. It measures symbol structure and placement, fillet, plug, slot and spot welds, groove weld symbols and dimensions and supplementary symbols, finishes, NDE and ISO and gives instant results with a shareable certificate.

Read the four skill areas on this page, then take the 20-minute test online — no fee, course or sign-up. You see every answer explained when you finish. Score 70% or more and you get a Welding Symbols Proficiency certificate straight away, on screen, as a PDF and by email, with a credential ID anyone can verify.

Yes. The questions are original scenarios written by Science of Apps, and each one is based on a public source you can read: AWS A2.4:2020 Standard Symbols for Welding, Brazing, and Nondestructive Examination (American Welding Society); ISO 2553:2019 Welding and allied processes – Symbolic representation on drawings – Welded joints (ISO). The source is shown under each question and linked in the answer review. Science of Apps doesn't copy questions from other tests.

Four skill areas with five questions each, drawn from a bank of 10 per area so a retake brings new questions: Symbol Structure and Placement (Reference line, Arrow and Tail); Fillet, Plug, Slot and Spot Welds (Size, Length and Pitch); Groove Weld Symbols and Dimensions (Groove types, Depth and Root opening); Supplementary Symbols, Finishes, NDE and ISO (Contour, Finish, Backing and ISO). Every question is an original scenario written to the 2026–2027 standard, with the published source named under it.

Welder or welding apprentice, Welding inspector or CWI candidate, Fabricator or fitter, Draughtsperson or design engineer and Quality control technician. It suits anyone who wants a quick, verifiable way to show Welding Symbols knowledge in 2026 and 2027, from students and career switchers to experienced professionals.

A welding symbol has a reference line, an arrow pointing to the joint, and an optional tail for the process or specification. Weld symbols, dimensions and supplementary symbols are placed on the reference line to show the weld type, size, length and finish.

In AWS A2.4, a weld symbol below the reference line means the arrow side and above means the other side. ISO 2553 system A adds a dashed identification line to show the other side, so readers must know which standard the drawing uses.

Yes. The test is online, in English and free everywhere — people take it from India, the US, the UK, Europe, Africa, Latin America and Asia-Pacific. Your certificate is dated with your own local date and can be verified from anywhere at scienceofapps.com/certification/verify/.

20 questions — 5 from each of 4 skill areas — with a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

We rate it Intermediate: assumes hands-on experience in the role. It has 20 scenario questions — 5 from each of 4 skill areas — and a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

Nothing. There is no fee to take a test, to receive the certificate, to have it emailed or to verify it, and no sign-up.

On our server, not in your browser. The answers never reach the page until you submit, so a certificate can only be earned by passing. Each certificate gets a unique credential ID stored by Science of Apps.

You see your score for each area and every question with the correct answer and why, with the published source behind it. You can retake after 30 minutes, and the retake draws questions you haven't seen yet.

No. Every certificate is dated, so it always shows when you passed. Retake a test any time for a newer date or a higher score.

Yes. After you pass, Add to LinkedIn opens the Licenses & certifications form with the certificate name, Science of Apps as the issuer, the issue date, your credential ID and the verification link filled in. You can also download it as a PDF or PNG, and it's emailed to you as a PDF.

Every certificate has a credential ID and a QR code. Scanning it, or entering the ID at scienceofapps.com/certification/verify/, shows the holder's name, the certification, the score and the issue date from our records.

No. They are Science of Apps' own assessments of applied skill. They aren't issued by a university or standards body, and they work best alongside a portfolio that shows the skills in real work.