Free Canada Certification Exam Practice Questions | 2026
Where this applies: Gasfitter — Class A carries a Red Seal endorsement in most provinces (examined through jurisdictions such as BC, Alberta and Manitoba). Ontario and Saskatchewan do not offer the Red Seal endorsement for this trade: Ontario licenses gas work through TSSA (Gas Technician G3/G2/G1) and Saskatchewan through TSASK/SATCC (General/Domestic Gas Fitter). This question bank covers the Red Seal (CSA B149.1-based) scope, which overlaps heavily with the TSSA G2/G1 and TSASK material.
The Red Seal Gasfitter (Class A) exam is the interprovincial certification for gas fitters working on natural gas and propane appliances and equipment, including those over 400,000 Btu/h (120 kW). Class A certification covers residential, commercial, and industrial gas installations including high-pressure supply, appliance commissioning, venting design, and combustion analysis.
The exam has 100 questions (red-seal.ca, checked October 2026). SkilledTradesBC set October 26, 2026 as the start date of its interprovincial exam based on the 2024 Red Seal Occupational Standard, which replaces the exam based on the 2014 National Occupational Analysis (checked October 2026), so check with your provincial or territorial apprenticeship authority which version applies to you. It is multiple choice, four options with one correct answer, based on the Red Seal Occupational Standard (RSOS) and aligned with CSA B149.1 Natural Gas and Propane Installation Code, with a passing score of 70%. Exam time is 4 hours.
These are the topic areas in this practice bank and what each one covers. The official exam has 100 questions, and Red Seal publishes how they are distributed across seven Major Work Activities — see the Gasfitter (Class A) exam information page (checked September 2026).
Red Seal publishes a 100-question breakdown for the Gasfitter (Class A) exam, based on the 2024 Red Seal Occupational Standard: tests and commissions fuel systems 23 questions, controls and electrical systems 19, services fuel systems 18, venting and air supply 13, installs and converts fuel systems and appliances 13, fuel piping and tubing 9, and common occupational skills 5 (red-seal.ca, checked October 2026). SkilledTradesBC set October 26, 2026 as the start date of its interprovincial exam on this standard, so confirm with your provincial or territorial apprenticeship authority which version you will write, and check the trade page at red-seal.ca before you book.
Every question is four-option multiple choice with exactly one correct answer, and the pass mark is 70%. Expect an applied exam: roughly 60–70% of questions are procedural and application style, 10–20% are critical thinking and 15–25% are straight knowledge and recall (red-seal.ca, checked September 2026). Controls, installation, commissioning and appliance service together account for almost three-quarters of the paper, so hands-on installation and service judgement matters more than memorized definitions.
Our free bank also contains 110 questions, organized by the topic filters above the quiz. Piping questions support Block B; Venting and Combustion questions cover Block C and the combustion-air side of installation work; Appliances questions train the equipment knowledge behind Blocks E and G; and Gas Supply plus Safety & Code questions build the CSA B149.1 code judgement you need across every block. Drill one topic at a time, then run the Mock Exam for a mixed, exam-style simulation. For strategy, read How to Pass the Gasfitter Class A Exam and Common Gasfitter Class A Exam Mistakes; for the bigger picture, see the Gas Fitter Career Guide.
This free tool includes 110 questions across this site's six topic areas, with a full explanation for every answer. Use Topic Filter to drill your weakest areas. Run the Mock Exam to simulate the real 100-question timed format.
Related reading: How to Pass the Gasfitter Class A Red Seal Exam | Gas Fitter Salary Guide | Gas Fitter Career Guide Canada
The Gasfitter (Class A) Question Bank — printable PDF
All 110 Gasfitter questions with every answer explained, in one 85-page PDF: questions first with no answers shown, then the key, then the explanations. At the back: one full-length 100-question practice exam made from those same questions, timed to the official 4 hours, with its own answer sheet and key. The 18-page Exam Revision Notes are included. Instant download.
| Major Work Activity | Topic | Questions |
|---|---|---|
| A | Performs common occupational skills | 5 |
| B | Installs fuel piping and tubing systems | 9 |
| C | Installs venting and air supply systems | 13 |
| D | Installs controls and electrical systems | 19 |
| E | Installs and converts fuel systems, appliances and ancillary equipment | 13 |
| F | Tests and commissions fuel systems, appliances and ancillary equipment | 23 |
| G | Services fuel systems, appliances and ancillary equipment | 18 |
* Official breakdown of the 100-question exam, red-seal.ca Gasfitter - Class A Exam Information (checked September 2026). Passing score: 70%. Code: CSA B149.1.
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The Gasfitter – Class A Red Seal exam has 100 questions (red-seal.ca, checked October 2026). SkilledTradesBC set October 26, 2026 as the start date of its interprovincial exam based on the 2024 Red Seal Occupational Standard, which replaces the exam based on the 2014 National Occupational Analysis, so confirm with your provincial or territorial apprenticeship authority which version you will write. Red Seal exam questions are multiple choice with four possible responses and exactly one correct answer, and the pass mark is 70%. Red Seal says each exam's questions are developed to assess the activities laid out in the Red Seal Occupational Standard.
Red Seal's Gasfitter – Class A exam information does not publish a pass rate or a difficulty rating. It says 60 to 70% of the questions test how you apply procedures to a situation, 15 to 25% test knowledge and recall, and 10 to 20% test critical thinking; on the exam based on the 2024 standard, the largest blocks are testing and commissioning (23 of 100 questions), controls and electrical systems (19) and servicing (18).
CSA B149.1, the Natural Gas and Propane Installation Code, applies where a province or territory adopts it by regulation. In Alberta, for example, CSA B149.1:25 came into force under the Gas Code Regulation on March 1, 2026; it applies where gas is used for fuel purposes and to the installation of natural gas and propane appliances and equipment downstream of the utility installation or of a propane container's first-stage regulator. The 2024 Gasfitter – Class A occupational standard refers to B149.1 throughout, and SkilledTradesBC provides B149.1 (with B149.2 and B149.3) at the Class A interprovincial exam.
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