What is on the 456A Welder Red Seal exam.

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01What is the 456A Welder Red Seal exam?

It is the national certification exam for the trade that the Red Seal Program and Ontario both call Welder. 456A is Ontario's trade code for it; the exam is the same interprovincial exam everywhere.

The content is set nationally. According to the Red Seal Exam Preparation Guide, tradespeople from across Canada decide what goes into the standard, write and review every exam question, and decide how many questions each section gets. The exam is then administered by the provincial and territorial apprenticeship and certification authorities; in Ontario that is Skilled Trades Ontario, which issues a Certificate of Qualification when you pass.

The format is the same as every Red Seal exam: multiple choice, four options (A to D), one correct answer, one mark per question and no penalty for a wrong answer. The Welder exam has 125 questions and the writing time is four hours, about 1 minute 55 seconds per question. The pass mark is 70 per cent. Seventy per cent of 125 is 87.5, so you need 88 correct answers and can miss 37.

The exam information page and the Self-Assessment Guide (dated January 2026) both give the 125-question breakdown using the task numbering of the 2023 Red Seal Occupational Standard for Welder, and that is the breakdown this guide uses. The preparation guide stresses that the exam covers the trade across Canada at the journeyperson level, not what you do in your own shop: a structural welder who runs flux core all day will still see GTAW, SAW, plasma and air carbon arc questions.

02What is on the 456A exam?

The Red Seal Program publishes how many questions come from each major work activity. For Welder the 125 questions break down like this.

One block dominates. Block D, welding processes, is 54 of the 125 questions, 43.2 per cent, more than blocks A and C put together. Block B, layout and fabrication, is next at 28 (22.4 per cent), then C, cutting and gouging, at 23 (18.4 per cent). The lightest is A, common occupational skills, at 20 (16.0 per cent). The shares here are worked out from the question counts. The Self-Assessment Guide rounds them to 16, 22, 18 and 44 per cent; the question counts are the figures to rely on.

03What does each block cover?

The task names below are the ones the 2023 standard lists under each major work activity, with the number of questions the Red Seal Program assigns to each. The standard has 16 tasks and 60 sub-tasks, and questions are written to the sub-tasks. The largest single tasks are SMAW (D-13) and FCAW, MCAW and GMAW (D-14) with 18 questions each, then fabricates components (B-8) with 16.

Block A: Common occupational skills (20 questions)

Six tasks. Maintains tools and equipment (4 questions) covers hand and power tools, stationary machinery, thermal cutting equipment (leak checks such as the creep test and soap test) and welding equipment. Uses access and material handling equipment (3) covers scaffolding, ladders, aerial work platforms, forklifts and rigging. Performs safety-related activities (4) covers hazard assessments, a safe work environment, including hot work permits, and PPE. Organizes work (3) covers documentation, drawings and welding symbols, planning and materials. Performs routine trade activities (6) is the largest task in the block: quality inspection (discontinuities such as porosity, undercut and cold lap, and the destructive and non-destructive tests), marking welds and materials for traceability, controlling preheat, interpass and post-heat temperatures, storing consumables and gas cylinders, selecting the process and power source, start-up and shut-down, and finishing. Uses communication and mentoring techniques is in the standard but carries 0 questions.

Block B: Layout and fabrication of components for welding (28 questions)

Two tasks. Performs layout (12 questions) covers developing templates, such as wrap-arounds, cutting templates and arc templates, and transferring dimensions from drawings to material using conversions, ratios, fractions and geometry, allowing for bend allowances, kerf and seam location. Fabricates components (16) covers preparing material, fitting components with hi-lo gauges, wedges, clamps, jigs and fixtures, tacking (bridge, penetrating and plug tacks), controlling expansion and contraction with strongbacks, gussets and tack sequence, and assembling components.

Block C: Cutting and gouging (23 questions)

Four tasks, one per method. Non-thermal cutting and grinding (6 questions) covers saws, shears and ironworkers, hand tools and portable power tools, and choosing discs and blades for each material. Oxy-fuel gas cutting, OFC (7), is the largest: fuel gases such as acetylene, natural gas, propane and MPS, single- and two-stage regulators, flashback arrestors, neutral, carburizing and oxidizing flames, and track and pipe beveling cutters. Plasma arc cutting, PAC (6), covers electrodes and constricting nozzles, air pressure and stand-off distance. Air carbon arc cutting, CAC-A (4), covers the power source and compressor, the carbon electrode types, and gouge defects such as copper and carbon deposits.

Block D: Welding processes (54 questions)

Four tasks, one per process family, each with the same four sub-tasks: select the equipment and consumables, set it up, set the operating parameters and perform the weld. SMAW (18 questions) covers constant current power sources, electrode classifications under CSA and AWS such as E4918 (E7018), rutile, cellulose, low-hydrogen and iron-powder coatings, arc force (dig) and hot start, and fillet, groove, plug, slot and surfacing welds in the flat, horizontal, vertical and overhead positions, plus 1G, 2G, 5G and 6G pipe. FCAW, MCAW and GMAW (18) covers constant voltage machines, solid, tubular and self-shielded wire, CO₂, argon, helium and mixed gases, and the modes of transfer: short circuit, globular, spray and pulse spray. GTAW (13) covers tungsten types (pure, thoriated, zirconiated, lanthanated, ceriated and rare earth), scratch, lift and high-frequency starts, pre-purge and post-purge, and damming and purging. SAW (5) covers fused, bonded, active, reactive and neutral fluxes, and the standard lists the flat and horizontal positions for it.

04What kind of questions are they?

The Red Seal Program describes the Welder question mix as knowledge and recall 40 to 50 per cent, procedural and application 35 to 45 per cent and critical thinking 10 to 20 per cent. On a 125-question exam that is roughly 50 to 63 recall questions, 44 to 56 procedural questions and 13 to 25 critical thinking questions. No other trade we cover has a recall share that high.

The exam information page gives one example of each type. The recall example asks what is used to check the interpass temperature of a welded joint; the answer is a temperature stick. The procedural example asks what is done to prepare a threaded area before build-up; the answer is to remove the worn threads by machining or grinding. The critical thinking example asks for the angle of cut needed to make a template for a 3-piece 90° elbow; the answer is 22.5°, the kind of layout arithmetic Block B is built on.

The Red Seal Exam Preparation Guide explains the three types. Recall questions check facts related to a sub-task, and you can often answer them before you read the options. Procedural questions test whether you know a procedure, and may include calculations. Critical thinking questions give you a situation and ask for the cause or the result. There are no trick questions, but the incorrect options are not always obvious.

A recall-heavy exam rewards vocabulary. The range of variables under each sub-task in the standard is a list of exactly the terms the questions use: flame types, modes of transfer, tungsten types, flux types, electrode coatings, testing methods, heat treatment methods. The preparation guide suggests index cards, the term on one side and the meaning on the other. For procedural questions it says to know all the procedures in the standard, not just the ones you have carried out yourself.

05What do you get in the exam room?

The Red Seal Exam Preparation Guide lists what you are provided with: an exam booklet, a diagram booklet if one is required, a pencil and eraser, a calculator if needed, and a bubble sheet to record your answers. It also lists other reference material "if required": an acronym list, math formulas and code book information. Scrap paper is provided too.

For Welder the exam information page publishes both a formula sheet and an acronym list and says both will be provided with the exam sitting. The formula sheet is short. It gives one constant, π = 3.1416, and five formulas: area of a circle (πr²), area of a triangle (height × base ÷ 2), circumference of a circle (2πr), length of an arc (θ° × (π/180) × radius) and volume of a cylinder (πr²h). There are no unit conversions, no metal densities and no electrode or amperage tables on it, and the page lists no code book information.

The acronym list covers the process and cutting names (SMAW, FCAW, MCAW, GMAW, GTAW, SAW, OFC, PAC, CAC-A), current and polarity terms such as CC, CV, DCEP, DCEN and ACHF, the documents (WPS, WPDS, PQR, MTR, ITP), testing (NDT, LPI), HAZ and GTSM (gouging to sound metal), and the bodies CSA, CWB, AWS and ASME. You get the meaning of each acronym; you still need to know what the thing does.

The guide's rules say no materials, bags, phones, watches or personal calculators in the room, and your province or territory may have rules of its own; ask your provincial or territorial office about anything else. More on the day itself is in what to expect on exam day.

06Is the Red Seal exam the same as a CWB ticket?

No, and the difference matters when you plan. The Red Seal exam is a written, multiple-choice test of trade knowledge. You do not strike an arc in it. Passing it earns your province's certificate of qualification with the Red Seal endorsement, which shows you know the whole trade as the national standard describes it. What that endorsement means is explained in what is a Red Seal.

A CWB ticket is a practical performance qualification under CSA W47.1: you weld a test coupon in a set process, position and thickness, and the coupon is tested, for example by bend tests or radiography. Tickets are tied to a company certified by the Canadian Welding Bureau. A pressure welder ticket is a separate provincial qualification for pressure work under CSA B51 and ASME Section IX; in Ontario, Skilled Trades Ontario notes that certain tasks a welder may perform legally require certification by the Technical Standards and Safety Authority (TSSA). The standard itself notes that welders are required by various codes to recertify or upgrade their qualifications within a specific period of time.

So a Red Seal does not give you a ticket, and a ticket does not give you a Red Seal. The two do meet on the exam, though: CWB, CSA, WPS, WPDS and PQR are all on the acronym list, and bend, tensile and hardness testing are part of Block A's quality inspection sub-task. As for the "hardest weld test", that is a question about practical tickets, and the Red Seal Program publishes nothing on it. The test positions and ratings are set by the CWB and the provincial pressure authorities, so ask them.

07How hard is the Red Seal welder exam?

Honestly, it is demanding in a particular way. Three things stand out. First, the recall share: 40 to 50 per cent of the questions test facts and definitions, the highest share of any trade we cover, so hands-on skill alone will not carry you. You have to know the names, numbers and classifications. Second, the scope: four welding process families, three thermal cutting and gouging processes, non-thermal cutting, layout, fitting and the common skills, all at the level of a journeyperson anywhere in Canada. Third, the pace and the margin: about 1 minute 55 seconds a question, and 37 wrong answers is the most you can afford.

The Red Seal Program publishes no pass rate, for this trade or any other. The provincial figures we found, each counted a different way, are set out in how hard is the Red Seal exam. What the published breakdown does tell you is where the risk sits: a weak spot in Block D costs the most, because it is 54 of the 125 questions.

08How should you prepare?

Follow the weights and study the processes first. In order: D (54), B (28), C (23) and A (20). Blocks D and B together are 82 of 125 questions, or 65.6 per cent; the other two are 43, or 34.4 per cent. Inside Block D, SMAW and the wire processes (FCAW, MCAW and GMAW) are 36 of its 54 questions, GTAW 13 and SAW 5. The five largest tasks (SMAW 18, wire processes 18, fabricates components 16, GTAW 13 and performs layout 12) hold 77 of the 125 questions, 61.6 per cent.

You need 88 correct answers. Even a perfect score on Block D leaves you 34 short, and a more realistic 40 of 54 on it means you need 48 of the other 71. A sensible split is to give Block D about 40 per cent of your time, B about a quarter, and share the rest between C and A. For each process, work through the standard's four steps: select the consumables and gas, set up, set the parameters and perform the weld. Learn the consumable classifications, the polarity for each process and electrode, and the causes and cures of each discontinuity.

Use the standard as a checklist. Of its 60 sub-tasks, 58 carry questions; the two under Task A-6 do not. Rate yourself on each of the 16 tasks with the three levels in the Red Seal Self-Assessment Guide for Welder: no or very little understanding or experience, some experience in limited situations, or fully competent in many situations. A low rating on SMAW, the wire processes, fabrication, GTAW or layout is your first priority. SAW (5 questions) and CAC-A (4) come later, but still go on the list. Practise the formula sheet calculations (arc lengths, circumferences for wrap-arounds, cylinder volumes, template angles) until picking the right formula is automatic. There is no penalty for a wrong answer, so answer everything. For a full method, see how to study for the Red Seal exam.

Official links: the Welder trade page and Red Seal Occupational Standard, the 2023 standard as a PDF, the exam information page (the breakdown, the question mix, the formula sheet and the acronym list) and the Self-Assessment Guide.

09How long does it take, and what does it pay?

In Ontario, Skilled Trades Ontario puts the Welder apprenticeship at 6,000 hours, approximately three years: 5,280 hours on the job and 720 hours of in-school training over three levels. Its 2025 trade report lists Grade 12 as the academic entry level. Other provinces and territories set their own hours, so check with your apprenticeship authority.

Welder is a non-compulsory (voluntary) trade in Ontario. You do not need a certificate to work in it, the Certificate of Qualification does not have to be renewed, and holders do not appear on the Public Register. Skilled Trades Ontario issued 51 Welder Certificates of Qualification in 2025.

On pay, the same Ontario trade report gives an annual range of $54,000 to $76,000 and an hourly range of $28 to $39, from Workforce Planning Ontario's Labour Market Insights Report 2025. Those are Ontario figures for the welder occupation code, which may include other workers, not Red Seal holders alone. With experience, the standard says welders may move into roles such as lead hand, welding supervisor, welding inspector, welding engineer and project manager.

10Where and how do you write it?

Each province and territory administers the exam itself and decides who is eligible to write it, so registration, fees and rewrite rules depend on where you write. In Ontario that is Skilled Trades Ontario; see the Ontario Red Seal exam guide. Elsewhere, start with Alberta, British Columbia, Saskatchewan or Manitoba, or find your jurisdiction in the guides by province. Fees vary by province; compare them in Red Seal exam fees by province, and read what happens if you fail the Red Seal exam before you book.

If you learned the trade on the job rather than through an apprenticeship, you may be able to challenge the exam. In Ontario, experienced workers use Skilled Trades Ontario's Trade Equivalency Assessment. The rules in every province are in how to challenge the Red Seal exam.

11Questions people ask

How hard is the Red Seal welder exam?

It is demanding mainly because of recall and scope. The Welder exam has 125 multiple-choice questions in four hours, and you need 88 correct (70 per cent). Between 40 and 50 per cent of the questions are knowledge and recall, the highest share of any trade we cover, and the exam spans four welding process families, three thermal cutting processes, layout, fabrication and common skills. The Red Seal Program publishes no pass rate for the trade.

How can I prepare for the Red Seal welder exam?

Study by the published weights. Welding processes is 54 of the 125 questions (SMAW 18; FCAW, MCAW and GMAW 18; GTAW 13; SAW 5), layout and fabrication 28, cutting and gouging 23 and common occupational skills 20. Rate yourself against the 16 tasks of the 2023 standard with the Red Seal Self-Assessment Guide, learn the range-of-variables vocabulary for the recall questions, and practise the five formulas on the sheet provided at the exam.

How do you become a Red Seal welder in Ontario?

Complete a Welder (456A) apprenticeship, which Skilled Trades Ontario puts at 6,000 hours (5,280 on the job and 720 in school over three levels), or qualify as an experienced worker through its Trade Equivalency Assessment. Then pass the 125-question Red Seal exam with 70 per cent, 88 correct answers. Skilled Trades Ontario then issues a Certificate of Qualification carrying the Red Seal endorsement.

What is a Red Seal in welding?

It is the Red Seal endorsement on a provincial Welder certificate of qualification, showing you passed the interprovincial Red Seal exam: 125 written multiple-choice questions on the whole trade. It is not a CWB ticket. A CWB ticket is a practical weld test under CSA W47.1, and pressure welding needs its own provincial qualification under CSA B51 and ASME Section IX. One does not replace the other.

How long does it take to become a Red Seal welder?

In Ontario the Welder apprenticeship is 6,000 hours, approximately three years, according to Skilled Trades Ontario: 5,280 hours on the job and 720 hours of in-school training over three levels. After that you write the Red Seal exam, 125 questions in four hours. Other provinces and territories set their own apprenticeship hours, so check with the authority where you work.

How much do Red Seal welders make?

In Ontario, Skilled Trades Ontario's 2025 trade report gives welders an annual range of $54,000 to $76,000 and an hourly range of $28 to $39, citing Workforce Planning Ontario's Labour Market Insights Report 2025. Those figures cover the welder occupation code in Ontario, which may include other workers, not only Red Seal holders. Pay elsewhere in Canada is not covered by that report.

12Sources

• Red Seal Program: Welder exam information: 125 questions, the question count for each major work activity and task, the question mix with one example of each question type, and the formula sheet and acronym list provided with the exam.
• Red Seal Program: Welder trade overview: the Red Seal trade name and the Red Seal Occupational Standard for the trade.
• Red Seal Occupational Standard: Welder (2023, PDF): the 4 major work activities, 16 tasks and 60 sub-tasks, the range of variables, the note on recertification and the career progression.
• Red Seal Program: Welder formula sheet (PDF): the constant and the five formulas provided with the exam.
• Red Seal Program: Welder acronyms (PDF): the acronym list provided with the exam.
• Red Seal Exam Self-Assessment Guide: Welder (PDF): the question count per major work activity and task, the rounded percentages, and the three-level self-rating used in the preparation section.
• Red Seal Exam Preparation Guide: exam format, pass mark, writing time, question types and study methods, exam supplies and exam room rules.
• Skilled Trades Ontario: Welder: the Ontario trade name and code (Welder, 456A), its non-compulsory status, the apprenticeship hours, the TSSA note, and the 2025 trade report linked from the page (entry level, certificates issued, pay ranges).
• Skilled Trades Ontario: Trade Equivalency Assessment: the Ontario route for experienced workers who did not complete an Ontario apprenticeship.

The question counts were checked against the Red Seal Program's exam information page and Self-Assessment Guide for Welder on September 29, 2026, and the task lists come from the 2023 Red Seal Occupational Standard, whose task numbering both documents use. The Ontario hours, certificate count and pay ranges come from Skilled Trades Ontario's Welder trade page and 2025 trade report. If the Red Seal Program changes the breakdown, its page is the final word. If you find one of ours out of date, tell us.

Related: 456A Welder practice exam · Free 456A practice questions · Red Seal exam fees by province · How hard is the Red Seal exam · What is a Red Seal · How to challenge the Red Seal exam · All guides

13Practice for this exam

TicketPrep 456A practice tests are weighted to the breakdown above, block by block, and every answer is explained, all four options. You can try five sample questions with no account.

Ten free questions per trade, no account: free practice questions. How our questions are written and checked: how our questions are made.