G2 Exam Structure in Ontario: Understand the Scope Before You Study
Plan G2 preparation around verified TSSA examination information, curriculum coverage and reference rules, while keeping booking and study progress separate.
When you move into G2 preparation, the amount of material can make a simple question surprisingly difficult: what does “ready for the exam” mean? Finishing a question bank, covering your course outline, and confirming an examination appointment are separate milestones.
Start with a clear record of the official information, then build your revision around evidence of understanding. This article was fact-checked on September 13, 2026 using TSSA's current pages and the documents they link.
Format and pass mark: keep the verified details together
TSSA's guide confirms multiple-choice Fuels questions and a 75% examination pass mark. Its question-count and time ranges cover multiple certificate types, without G2-specific figures. TSSA examination guide.
We have not verified an exact G2 question total or writing duration in these public sources. Confirm those details for your own sitting. Avoid building a pacing calculation around a number supplied by a practice app or an older account of someone's examination.
This uncertainty does not prevent useful preparation. You can work on explaining unfamiliar questions, managing a chosen practice period, and noticing where your reasoning slows down. Label that work as practice so that its settings do not quietly become your assumed official exam format.
Understand the training map without inventing topic weights
TSSA maps G2 training to the G3 foundation plus modules 10–24. The additional material includes piping, electricity, controls, buildings, metering, appliances, heating, venting and air handling. The map supplies curriculum requirements, not question percentages. TSSA Gas/Oil policies, sections 19 and 21.
Use the complete module list in that document alongside your provider's course outline. Group related lessons for revision, but retain a separate record of every topic. A broad label such as “heating” can otherwise hide sections that you have not revisited.
Do not assume that a familiar G3 topic requires no attention, or that every newer topic deserves equal time. Your starting point is the work you can demonstrate and the gaps identified in class. For help carrying earlier foundations forward, see the G3-to-G2 study transition.
Build a coverage record that shows the work
Make one row per course topic with four columns: explanation, reference, unfamiliar example, and unresolved question. Keep the entries short enough to update after a session.
Here are original examples of the kind of evidence to record; they are study tasks, not claims about the questions TSSA will ask:
Type of work | Useful evidence in your notes |
|---|---|
Interpreting a diagram | You traced the stated relationships and explained the shown condition |
Working with quantities | You chose a method, carried the units, and checked the result |
Reading a requirement | You identified the scope and the condition that makes it relevant |
Comparing examples | You explained why a changed detail affects the reasoning |
Suppose a learner repeatedly answers questions in one topic correctly but cannot explain a different version without looking at the options. Mark the unfamiliar-example column as incomplete. That is more informative than treating the entire topic as finished because the most recent score was high.
Use G2 module practice for a targeted check, then return to the assigned source when the reasoning remains uncertain. After resolving the gap, try a different example rather than immediately repeating the same answer sequence.
Booking is a separate track from revision
The current TSSA FAQ describes computer-based exams taken in person at Prometric centres. Candidates apply through TSSA and schedule after receiving eligibility instructions. Training-provider or employer special sittings require confirmation with the organiser. TSSA examination FAQ.
Make a small administrative record with the certificate level, application reference, eligibility message, and appointment details. Keep the exam preparation calendar beside it, but do not use progress through a study programme as proof that the administrative steps are complete.
If you are unsure which route applies to you, explain your current position when asking your training provider or TSSA: the programme you completed, the certification you are seeking, and the message you have received. Avoid relying on a classmate whose application circumstances differ.
Check references before planning a rehearsal
The G2/G3 entry includes legislation, Code Adoption Documents, B149.1, B149.2, and optional B149.2S1. Candidates supply permitted references; writing and notes are prohibited, while highlighting, dividers and tabs are allowed. TSSA permitted-materials rules.
Read the complete entry and the guide's rules for the materials themselves. Check any uncertainty about editions or annotations before your sitting. A document that helps you study is not automatically something you may bring into the examination.
During a classroom rehearsal, record which references you used and whether you needed help locating an answer. That gives you a concrete reference-reading task afterwards. It is more useful than merely labelling the session “open book” and leaving the actual conditions undocumented.
Turn the record into a workable revision schedule
Choose the next session from a specific empty or uncertain column in your coverage record. Keep room for targeted learning, combined practice, and questions to your instructor. When work or family commitments interrupt the week, move unfinished tasks deliberately rather than restarting the entire course.
The adjustable four-week G2 study plan provides a practical way to organise that work. Keep exact examination details tied to current instructions, and let your study record show the reasoning you can reproduce across the course.