TSSA Gas Technician 1 (G1) study guide
TSSA Gas Technician 1 (G1) · Work through your exam, one topic at a time.
The Gas Technician 1 (G1) credential sits at the top of Ontario's gas technician certification ladder and is administered within the fuels safety framework overseen by the Technical Standards and Safety Authority (TSSA), Ontario's public safety regulator for Fuels along with Elevating & Amusement Devices, Ski Lifts, Boilers & Pressure Vessels and Operating Engineers. This independent study page is written for candidates who already hold a lower gas technician class, or who are working toward the G1 scope, and who need a structured way to revise the technical material before writing the certification exam. The TSSA Gas Technician 1 (G1) study guide has 5 sections and about 2,626 words.
01Gas fundamentals
Natural gas is mostly methane with a relative density of about 0.60 (air = 1), so it rises and collects at high points. Propane is about 1.52 and collects at low points.
433 words, about 2 min02Codes and regulations
The Technical Standards and Safety Act, 2000 is the Ontario statute; TSSA administers it. 212/01 (Gaseous Fuels) adopts CSA B149.1 with Ontario amendments.
416 words, about 2 min03Installation, servicing and troubleshooting of gas-fired appliances
Confirm the appliance is certified for the gas supplied and for the altitude; check the rating plate for input, manifold pressure, clearances and vent category. Maintain clearances to combustibles, service access, and protection from water, freezing, lint and corrosive vapours.
445 words, about 2 min04Piping, tubing, fittings and gas supply systems
Use black steel or wrought-iron pipe for above-ground gas piping unless the code permits another listed material. Copper tubing may be permitted for natural gas and propane in specific applications; verify the code and manufacturer limits, particularly for propane and buried lines.
467 words, about 2 min05Venting, combustion air and flue gas management
Category I is negative-pressure, non-condensing and typically uses Type B vent. Category II is negative-pressure, condensing.
865 words, about 4 min