TSSA Gas Technician 2 (G2) study guide
TSSA Gas Technician 2 (G2) · Work through your exam, one topic at a time.
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 TSSA Gas Technician 2 (G2) study guide has 5 sections and about 2,627 words.
01Gas Fundamentals and Properties of Gases
This domain tests whether you can predict how natural gas and propane behave before, during and after combustion: composition, density, heating value, flammable range, gas laws and pressure measurement. These are the numbers behind orifice sizing, input verification, leak response and combustion troubleshooting.
515 words, about 3 min02Codes, Regulations and Standards
This domain tests whether you know which document governs a given task, what your certificate lets you do without supervision, and when an inspector must be involved. Marks are lost by quoting a remembered rule that the actual standard does not contain.
540 words, about 3 min03Installation of Gas Piping and Tubing Systems
This domain tests materials, jointing, support, burial, appliance connections, sizing and pressure testing. It is the most hands-on part of the G2 exam and the most likely place for a single wrong number to cost several marks.
574 words, about 3 min04Venting, Combustion Air and Appliance Installation
This domain tests whether an appliance can safely get air in and flue gases out. Exam questions centre on vent categories, connector slope and clearance, termination height, confined-space calculations and free area.
520 words, about 3 min05Testing, Commissioning, Servicing and Troubleshooting
This domain tests whether you can prove an appliance is working correctly and diagnose it methodically when it is not. Exam questions favour sequence-of-operation logic, measured values, and the difference between a symptom and a cause.
478 words, about 2 min