TSSA Gas Technician 3 (G3) study guide
TSSA Gas Technician 3 (G3) · Work through your exam, one topic at a time.
The Gas Technician 3 (G3) credential is the entry-level certification in Ontario's fuels safety system, regulated by the Technical Standards and Safety Authority (TSSA). TSSA describes itself as "Ontario's public safety regulator for Elevating & Amusement Devices, Ski Lifts, Fuels, Boilers & Pressure Vessels and Operating Engineers," and administers certification for fuels industry professionals alongside exam registration, accredited training and licensing services. The TSSA Gas Technician 3 (G3) study guide has 4 sections and about 2,217 words.
01General Gas Knowledge
The General Gas Knowledge domain tests the physical and combustion fundamentals that every later calculation depends on: what natural gas and propane are, how they behave at different pressures and temperatures, how they burn, and how appliance input is measured. Expect definition-style questions, simple gas-law calculations, and questions that ask you to predict flame behaviour from an air/gas ratio.
461 words, about 2 min02Safety and Regulations
The Safety and Regulations domain tests the legal framework and the safety habits expected on every job: who may do what, which code and regulation apply, how to test and purge, and how to react to a gas release or CO alarm. The Technical Standards and Safety Act, 2000 gives TSSA authority to administer fuels safety.
486 words, about 2 min03Gas Piping, Tubing and System Installation
Gas Piping, Tubing and System Installation tests materials, sizing, routing, protection, and pressure testing. The exam expects you to read a simple system, choose an approved material, size the line for the load, and install it so it can be tested, purged, and serviced.
402 words, about 2 min04Venting and Combustion Air
Venting and Combustion Air covers how flue gases leave the appliance and how replacement air enters. Questions test vent category, clearances, termination, slope, combustion-air sizing, and the draft and CO checks used on service calls.
868 words, about 4 min