What is the passing score for the G3 gas technician exam?

The G3 gas technician exam requires a minimum score of 65% to pass. The exam is multiple-choice and administered through the Technical Standards and Safety Authority (TSSA). If you do not pass on your first attempt, you can rebook the exam after a waiting period, though additional exam fees apply for each attempt.

What are the eligibility requirements to take the G3 exam?

To sit for the G3 gas technician exam, you must be at least 16 years old and have completed an approved gas technician training program through a TSSA-recognized training provider. There is no prior work experience requirement for the G3 level, making it the entry-level gas technician certification in Ontario.

How do I register for the G3 gas technician exam?

You register for the G3 exam through a TSSA-approved examination center. Your training provider will typically guide you through the booking process after course completion. You will need to provide valid government-issued photo identification on exam day, and the examination fee must be paid at the time of registration.

How long do I have to complete the G3 exam?

The G3 gas technician exam has a time limit of approximately 3 hours. This gives you enough time to carefully read each multiple-choice question and review your answers before submitting. Most candidates finish within 1.5 to 2 hours, so there is generally no need to rush through the questions.

What topics should I focus on when studying for the G3 exam?

Focus your study time on the Ontario Gas Code (CSA B149.1), venting requirements, combustion air calculations, gas piping sizing, and appliance installation standards. The exam heavily tests your understanding of code references and safe installation practices. Knowing how to use the code book efficiently during the exam is critical since it is an open-book test.

Can I use reference materials during the G3 exam?

Yes, the G3 gas technician exam is open-book. You are permitted to bring the Canadian Gas Code (CSA B149.1) and the Ontario Gas Installation Code into the examination room. Familiarity with these reference materials is essential because quickly locating specific code sections during the exam saves valuable time and improves your accuracy.

How much does it cost to take the G3 gas technician exam?

The G3 exam fee is set by your approved examination center and typically ranges from $80 to $120 CAD. This fee covers one exam attempt only. If you need to retake the exam, you will pay the full fee again. Training program costs are separate and vary by provider, generally ranging from $500 to $1,500 CAD.

What happens after I pass the G3 exam?

After passing the G3 exam, you must apply for your G3 certificate of qualification through TSSA. This involves submitting your exam results, completing the application form, and paying the certification fee. Once issued, your G3 certificate allows you to work on residential gas appliances rated up to 400,000 BTU/h input under the supervision requirements outlined by TSSA.

G3 (Gas Technician Level 3 Certification) Test Guide 2026 June

Name: G3 (Gas Technician Level 3 Certification) Test Guide
Uploaded: 2024-12-17T01:00:32.000Z
Description: Pass your G3 (Gas Technician Level 3 exam on the first attempt. Practice questions with detailed answer explanations, hints, and instant scoring. 💡

Pass your G3 (Gas Technician Level 3 exam on the first attempt. Practice questions with detailed answer explanations, hints, and instant scoring. 💡

G3 - Gas Technician Level 3 Certification By Tony GarzaJun 3, 202653 min read

G3 (Gas Technician Level 3 Certification) Test Guide 2026 June

⏱️3 HoursTime Limit

📝75Questions

✅75%Pass Rate

💵$150Exam Fee

The Gas Technician 3 (G3) license is mandatory for anyone working under supervision on gas-fired equipment in Ontario. Achieving your G3 gas technician status requires completing an accredited Gas Technician 3 course and passing the TSSA G3 test. This certification validates your understanding of the CSA B149.1 Natural Gas and Propane Installation Code.

Gas Technician 3 - Gas Technician Level 3 Certification study guide

G3 Practice Test Questions

Prepare for the G3 - Gas Technician Level 3 Certification exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.

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G3 Exam Flashcards

Quick review for your Gas Technician 3 license

🔥What is the primary code for gas installation in Ontario?

The primary code is the CSA B149.1 Natural Gas and Propane Installation Code, which is essential for the TSSA G3 test.

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🌡️What is the minimum passing score for the G3 exam?

You must achieve a score of at least 75% to pass the Gas Technician 3 exam administered by TSSA.

REVIEW G3 QUESTIONS

⚠️Who oversees gas technician certification in Ontario?

The Technical Standards and Safety Authority (TSSA) oversees all Gas Technician 3 certification and licensing.

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🔧Can a G3 work unsupervised?

No, a G3 Gas Technician must always work under the direct supervision of a G2 or G1 license holder.

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📘How long does G3 training take?

A typical Gas Technician 3 course takes approximately 12 weeks or 180 hours of combined theory and practical training.

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📝What prerequisites are needed for the G3 course?

Generally, a Grade 10 education or equivalent is required to enroll in an accredited Gas Technician 3 training program.

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G3 EXAM QUESTIONS QUIZ

G3 Exam Study Guide

Our comprehensive G3 Gas Technician study guide breaks down every aspect of the exam. From understanding the tssa g3 test structure to registering for your gas technician 3 license, these tabs provide the essential information you need.

What is the G3 exam?	The G3 exam is the entry-level certification test administered by TSSA in Ontario. It qualifies you to work on gas-fired equipment under supervision as a Gas Technician 3.
Who needs the G3 gas technician license?	Anyone in Ontario wishing to pursue a career in HVAC or gas fitting must start with the G3 gas technician license before advancing to G2 or G1 levels.
What does the TSSA G3 cover?	The TSSA G3 exam covers safety regulations, propane handling, piping, venting, and the CSA B149.1 installation code.
Is the G3 exam hard?	The G3 exam can be challenging for those unfamiliar with the codes. However, completing a Gas Technician 3 course and using our g3 practice test greatly improves your chances.

What is the G3 exam?

The G3 exam is the entry-level certification test administered by TSSA in Ontario. It qualifies you to work on gas-fired equipment under supervision as a Gas Technician 3.

Who needs the G3 gas technician license?

Anyone in Ontario wishing to pursue a career in HVAC or gas fitting must start with the G3 gas technician license before advancing to G2 or G1 levels.

What does the TSSA G3 cover?

The TSSA G3 exam covers safety regulations, propane handling, piping, venting, and the CSA B149.1 installation code.

Is the G3 exam hard?

The G3 exam can be challenging for those unfamiliar with the codes. However, completing a Gas Technician 3 course and using our g3 practice test greatly improves your chances.

The G3 exam is open-book, meaning you can use your B149.1 Code Book. Don't memorize every rule; instead, practice quickly navigating the code to find answers. Our g3 practice test helps improve your speed.

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G3 Score Calculator

Total Scored Questions

150

How many questions did you answer correctly?

0105150

105 out of 150 correct

70%

Required to Pass: ~70% (Estimated)

Your Score: 105 correct✓PASS

Expect to invest between $2,500 and $5,000 total for your Gas Technician 3 certification. Many G3 programs offer payment plans or financial aid.

G3 Gas Technician - Gas Technician Level 3 Certification study guide

GAS TECHNICIAN 3 TEST

TSSA G3 PRACTICE EXAM

G3 Test Day Checklist

✓Valid Photo ID
✓Exam Confirmation
✓CSA B149.1 Code Book
✓Non-Programmable Calculator
✓Pencils and Erasers
✓TSSA Authorization Letter
✓Arrive 30 Mins Early
✓Review G3 Notes

📄Free G3 Practice Test PDF

Ready to Pass Your G3 Exam?

Get unlimited access to TSSA-style g3 practice test questions and detailed study guides. Start your journey to becoming a licensed G3 gas technician today.

G3 Renewal Requirements

📅

Frequency

2 Years

💵

Cost

$80

Ensure you renew your G3 license on time to avoid penalties or having to retake the gas technician 3 exam. Most technicians upgrade to G2 before renewal is necessary.

✅Pros

+Industry-recognized credential boosts your resume
+Higher earning potential (10-20% salary increase on average)
+Demonstrates commitment to professional development
+Opens doors to advanced career opportunities

❌Cons

−Exam preparation requires significant time investment (4-8 weeks)
−Certification fees can be $100-$400+
−May require continuing education to maintain
−Some employers may not require certification

G3 Questions and Answers

About the Author

Tony GarzaASE Master Technician, BS Automotive Technology

ASE Master Technician & Automotive Certification Trainer

Universal Technical Institute

Tony Garza is an ASE Master Technician certified across all eight automotive service areas, with a Bachelor of Science in Automotive Technology from Universal Technical Institute. He has 22 years of shop experience and 9 years teaching ASE certification prep courses. Tony specializes in engine performance, electrical systems, and transmission diagnostics for certification candidates.