TSSA Gas Technician 2 (G2)
More study resources
Cheat sheet
Keep the key ideas within reach.
ExploreKey terms
Get comfortable with the vocabulary.
ExploreStudy plan
Give each week a clear focus.
ExploreCommon mistakes
Understand the traps and how to avoid them.
ExploreCase studies
Put your knowledge to work in context.
ExploreExam-day guide
Prepare for the day ahead.
ExploreAbout this exam
The Gas Technician 2 (G2) credential is a fuels industry certification in Ontario, regulated by the Technical Standards and Safety Authority (TSSA). It is intended for tradespeople who install, service, and maintain gas-fired appliances and piping systems in residential and light commercial settings. The G2 exam assesses knowledge across five domains: gas fundamentals and properties (25%), codes, regulations and standards (20%), installation of gas piping and tubing systems (20%), venting, combustion air and appliance installation (20%), and testing, commissioning, servicing and troubleshooting (15%). Candidates typically prepare through accredited training programs, self-study of the applicable codes (such as the Gas Code and the Natural Gas and Propane Installation Code), and hands-on practice under supervision. TSSA provides resources including exam registration, accredited training lists, and FAQs on its website. Note that this page is independent and not affiliated with TSSA; always verify details with TSSA directly. The exam is challenging and requires both theoretical understanding and practical application. Successful candidates demonstrate competence in safety, code compliance, and troubleshooting. Preparing with a structured study plan that covers all domains is essential. Many candidates benefit from reviewing code books, practicing calculations, and familiarizing themselves with common installation scenarios. This guide provides an overview and FAQ to support your preparation journey.
What you'll study
About TSSA Gas Technician 2 (G2) preparation
What is the format of the G2 exam?
The exam format is not specified in the available TSSA source. TSSA offers exam registration through its website, but details such as number of questions, time limit, and pass mark are not provided here. Check TSSA's official resources for current exam format information.
How difficult is the G2 exam?
Difficulty varies by candidate. The exam covers five domains with significant weight on gas fundamentals (25%) and codes (20%). Success typically requires thorough study of codes, practical experience, and familiarity with installation and troubleshooting. Many candidates find the code-related questions challenging due to the need to recall specific requirements.
Can I retake the exam if I fail?
Retake policies are not specified in the available TSSA source. TSSA provides information on exam registration and certification through its website. Candidates should consult TSSA directly for retake procedures, waiting periods, and any associated fees.
How long is the exam and how much time do I have?
The exam duration is not provided in the available TSSA source. TSSA's exam registration page may contain timing details. It is advisable to check with TSSA for current exam duration and scheduling options.
What study order do you recommend?
Start with gas fundamentals and properties (25% weight), then move to codes and regulations (20%). Next, study piping and tubing installation (20%) and venting/combustion air (20%). Finish with testing, commissioning, servicing and troubleshooting (15%). This order builds foundational knowledge before applying it to installation and service scenarios.
What are common failure modes on the G2 exam?
Common failure modes include insufficient knowledge of code requirements, difficulty applying gas fundamentals to practical situations, and overlooking venting and combustion air details. Many candidates also struggle with troubleshooting questions that require systematic thinking. Thorough preparation across all domains and hands-on practice help mitigate these risks.
How do I register for the G2 exam?
TSSA provides an online portal for exam registration. The TSSA website lists 'Register for an Exam' under Training & Professional Certification. Candidates should visit TSSA's website to access the registration system and find current instructions, requirements, and fees.
Is there an official study guide or training I should take?
TSSA lists 'Accredited Training' and 'Fuels Industry Professional' resources on its website. While specific study materials are not detailed in the available source, candidates can explore TSSA's Training & Professional Certification section for accredited training providers and exam FAQs. Independent study using current code books is also essential.