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Ontario · TSSA G3 challenge exam

The G3 challenge exam is open book. That is exactly why people fail it.

You are allowed to bring the code book in. Nobody fails because the answer was not in front of them — they fail because they could not find it fast enough, or they could not read a capacity chart under the clock. This course drills the finding and the reading, not just the facts.

Built by a G1 gas technician who has taught hundreds of tradespeople, one on one and in a classroom.

$249CAD
One payment. No subscription. 12 months of access.
  • 19 sessions, unlocked as you work through them
  • 1,150+ practice questions
  • Written explanation on every one
  • Capacity chart drill
  • Gas pipe sizing trainer
  • 100-question final, timed like the real thing

Secure checkout by Stripe.

Why the challenge route catches people out

Most people sitting the challenge exam have done the work for years. That is the problem — the exam is not testing whether you can do the job.

The clock, not the knowledge

You know what a dirt pocket is for. The question is whether you can put your finger on the clause in under a minute, twenty-odd times in a row.

Charts under pressure

Sizing questions are pure lookup — the right row, the right column, the right table. It is mechanical, and it is the first thing to fall apart when you are behind.

Field habits are not code

The way it has always been done on your trucks and the way B149.1 words it are not always the same thing. The exam marks the book.

What you get

Everything is built against B149.1:25 and the Ontario amendments.

19sessions
1,150+practice questions
100%with a written explanation
20slide decks
1

Sessions you work through in order

Each one is a deck to read and a quiz to pass. Short enough to do in an evening, and they stack.

2

Quizzes that keep looking back

Roughly 40% of each quiz is the session you just did. The rest is everything before it, weighted toward the topics the exam leans on. You do not get to forget session 3 by session 12.

3

Drill your weak spots

A 20-question drill pulled from wherever you are actually losing marks, not a random shuffle.

4

Chart reading drill

Find the row, scan across, land on the first size that carries the load — against a clock. It is a motion, and it gets faster with reps.

5

Gas pipe sizing trainer

A new piping diagram every time — appliance loads, lengths, mixed iron, copper and CSST, sometimes a regulator in the middle. Total the load, find the longest run, pick the chart, size the section. Walk-through mode for learning it, exam mode for proving it.

6

A real final

100 questions, timed at the same pace as the exam, drawn from everything you have covered.

See the actual material

Six real slides out of the 394. Every one ends with a NOW FIND IT box that sends you into your own code book — that is the whole design.

Course slide explaining how a CSA B149.1 clause number breaks into section, sub-section and item
Decoding a clause number Deck 0 · Code Book Anatomy
Course slide showing how to read an Annex A gas pipe capacity table: length down the side, pipe size across the top
Reading a sizing table Deck 5 · Pipe Sizing, Annex A & B
Course slide listing the common gas pipe sizing mistakes on the G3 exam
What trips techs up on sizing Deck 5 · Pipe Sizing, Annex A & B
Course slide on combustion air sizing using CSA B149.1 Tables 8.1 and 8.2
Combustion air, Tables 8.1 / 8.2 Deck 7 · Combustion Air & Venting
Course slide explaining a 2 psi gas system and line pressure regulators
The 2 psi system Deck 2 · Pressure Regulators
Course slide on where millivolt gas control systems are still found in the field
Where millivolt systems still live Deck 18 · Millivolt Systems

Slides are read in the course itself, one at a time — there is nothing to download.

How it runs

You cannot skip ahead, and that is deliberate.

80% to move on

Under that and you sit the session again. The material is cumulative — carrying a gap forward only makes the next one harder.

90% is a clean pass

Between 80 and 90 you move on, but you are offered the retake. Take it.

Answers explained

Every question tells you why the right answer is right — and, where it matters, why the one you picked is the trap.

Questions get reshuffled

Options are reordered every attempt and the app tracks what you have seen least, so a retake is a real retake.

Who built it

Caleb — gas technician and contractor in Chatham-Kent, Ontario.

G1 gas technician 313A refrigeration & A/C mechanic Chatham-Kent, Ontario

I have trained hundreds of people in this trade — riding along in the truck and standing at a whiteboard. This course is the classroom version of that, built because I got tired of watching good technicians fail an exam that was testing their book-handling rather than their trade.

What this is not

Worth being straight about before you spend anything.

  • Not TSSA, and not affiliated with TSSA or CSA. This is independent preparation material. Your exam, your registration and your certificate all go through TSSA directly.
  • The code book is not included, and you need one. You will be sizing pipe and looking up clauses out of your own copy of CSA B149.1 — that is the skill the exam tests, and no course can hand it to you. Buy it from CSA.
  • No pass guarantee. The material is all here and you can take the quizzes as often as you like. I can hold your hand through the material. I cannot hold your hand in the exam.
  • It will not do the work for you. Reckon on about twenty evenings if you take it seriously.

Questions

How long do I have access?

12 months from the day you enrol. One payment — there is no subscription and nothing renews.

Do I need the code book?

Yes, and it is not optional. The exam is open book and so is most of this course. Get CSA B149.1:25 and the Ontario amendments before you start.

What if I am not ready for the exam at the end?

Then sit it again here before you book. Drills and quizzes are unlimited for your whole access period, questions reshuffle, and the drill targets whatever you are still getting wrong.

Is this for G3 only?

Right now, yes — the Ontario G3 challenge exam. G2 and 313D are in the works.

Can I use it on my phone?

Yes. Quizzes and drills work fine on a phone. The slide decks and the piping diagrams are easier on a tablet or a laptop.

Can I put my technicians through it?

Yes — get in touch before you buy and I will sort out a group rate and a way to see how your people are doing.

Refunds?

If you have not opened past the first session, email me within 14 days and I will refund you. Once you are into the material it has been delivered, so I cannot.

Ready to sit it?

19 sessions, 1,150+ questions, and the two drills that decide whether you finish the paper.

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