TSSA Gas Technician 2 (G2) case studies
TSSA Gas Technician 2 (G2) · Put your knowledge to work in context.
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 G2 exam assesses knowledge across five domains: gas fundamentals and properties (25%), codes, regulations and standards (20%), installation of gas piping and tubing systems (20%), venting, combustion air and appliance installation (20%), and testing, commissioning, servicing and troubleshooting (15%). Candidates typically prepare through accredited training programs, self-study of the applicable codes (such as the Gas Code and the Natural Gas and Propane Installation Code), and hands-on practice under supervision. The TSSA Gas Technician 2 (G2) case studies are 5 cases and about 2,877 words.
1Meter Clocking Reveals a 33% Overfire
On a service call for a 60,000 Btu/h natural-gas upflow furnace, the homeowner reports a roaring burner and short cycling. The rating plate calls for a 3.5 in.
549 words, about 3 min2CSST Run Through a Return-Air Plenum
During a basement finish, a renovator runs 30 ft of 1/2 in. corrugated stainless steel tubing (CSST) from the meter manifold to a 60,000 Btu/h furnace.
603 words, about 3 min3Common-Vented Natural-Draft Appliances Spilling CO
A 35,000 Btu/h natural-draft water heater and an 80,000 Btu/h natural-draft furnace are connected to a common 6 in. masonry chimney in a 1,200 ft² bungalow.
571 words, about 3 min4Garage Unit Heater Clearances and Vent Penetration
A homeowner wants a 45,000 Btu/h natural-gas unit heater installed in a 24 ft x 24 ft attached garage with a 10 ft ceiling. The heater has electronic ignition and a 4 in.
603 words, about 3 min5Condensing Furnace Pressure Switch Lockout in Cold Weather
A 60,000 Btu/h 90% condensing furnace is installed in a closet with a 2 in. PVC vent and intake.
551 words, about 3 min