TSSA Gas Technician 2 (G2) study plan

Define the measurable physical properties of natural gas and propane (relative density, heating value ranges, Wobbe index, flammability limits, ignition temperature) and state how each affects appliance operation

Convert between imperial and SI units for pressure, heat input, gas rate, and specific gravity without reference aids

Explain the relationship between pressure, gas rate, and orifice size, and predict what happens to burner input when supply pressure changes

Describe complete and incomplete combustion and identify the products and symptoms of each in a gas appliance

Calculate combustion air requirements for a given appliance input and room volume, and determine whether a confined space needs two permanent openings

Explain draft, spillage, and the difference between natural draft, induced draft, and power-vented appliances

Trace the path of flue gases through a Category I through IV appliance and justify why each category needs its venting approach

Identify the signs of depressurization and spillage in a residential setting and state the test that confirms each

Locate and read the clauses governing installation clearances, venting, and piping in the current Canadian gas installation code and the applicable provincial regulation

Distinguish the roles of the national code, the provincial regulation, the CSA certification mark, and the manufacturer's installation instructions when requirements conflict

List the approval and notification steps a G2 holder must follow before and after installing or altering an appliance

Identify the documentation an inspector may request at each stage of a job

Size a natural gas and a propane piping run using the pipe sizing tables, including equivalent length for fittings and allowable pressure drop

Select between steel pipe, copper tubing, and corrugated stainless steel tubing for a given application and justify the choice against code and material limits

Describe required support spacing, protection from physical damage, and the rules for concealed and underground runs

Explain bonding and grounding requirements for gas piping and why they matter

Lay out a piping system from meter to appliances including drip legs, sediment traps, shutoff valves, and union locations

Specify the leak test procedure for a new installation: test medium, pressure, duration, and what constitutes a pass

Identify the correct method for joining each material type and the inspection points a code officer would check

Diagnose three common piping faults (undersized run, missing sediment trap, improper concealed joint) and state the corrective action for each

Verify vent connector slope, rise, termination clearance, and liner requirements for a specified appliance and building configuration

Determine whether an existing chimney or vent can accept a new appliance and identify when relining or resizing is required

Check combustion air, clearance to combustibles, and accessibility against manufacturer's instructions for two sample appliances

Explain the risks of common venting and backdrafting and the field tests that reveal them

Perform and record a clock-dial gas rate test and a manifold pressure test, and interpret results against the appliance rating plate

Describe the startup sequence and safety checks for a newly installed appliance, including purging, pilot and ignition verification, and limit and safety switch testing

Build a troubleshooting sequence for three faults: intermittent ignition failure, delayed ignition, and sooting, listing the checks in order

Explain carbon monoxide testing procedure, acceptable readings, and the actions required when readings exceed limits

Review weak areas flagged by earlier deliverables and re-derive the underlying rule or calculation for each

Practice applying code clauses to short scenario questions under time pressure across all five domains

Recite the safety-critical limits from memory: leak test pressures, clearances, combustion air ratios, and CO thresholds

Plan the exam-day approach: question triage, unit-checking habit, and how to handle questions where two answers look plausible