TSSA Gas Technician 3 (G3) study plan

Map the four exam domains against the current TSSA G3 curriculum outline and write a one-page crosswalk showing which domain each major topic falls under

List the key properties of natural gas and propane (relative density, heating value ranges, odorant, flammability limits) from memory without notes, then correct the list against a code reference

Define the G3 scope of work and identify which tasks a G3 holder may and may not perform compared with G2, citing the regulation by section

Describe the gas technician's legal duties for reporting incidents, working near gas leaks, and following the applicable installation and safety codes

Explain the combustion process step by step and identify the products of complete and incomplete combustion with their associated hazards

Describe how carbon monoxide is produced and list the symptoms and at-risk conditions a technician must recognize

Identify the correct personal protective equipment, leak-detection methods, and lockout steps for common service scenarios

Distinguish the roles of the regulator, the distributor, and the contractor in the notification and permitting chain

Identify common pipe and tubing materials and their approved applications, and state where each is prohibited

Describe sizing principles well enough to select a line size for a simple appliance load given a capacity table

Explain support spacing, protection from physical damage, and clearance requirements for piping runs

Describe the purpose and placement of manual shutoff valves, sediment traps, and unions in a typical residential installation

Describe the pressure-testing procedure for new and existing piping, including test medium, duration, and acceptable pressure drop

Explain purging and leak-testing steps before placing an appliance in service

Identify the components of a venting system and the difference between Category I, II, III, and IV appliances

State the rules for vent termination locations relative to windows, doors, and air intakes

Calculate required combustion air for a confined space using the two-permanent-opening method and the one-permanent-opening method

Explain how a spillage-susceptible appliance differs from a direct-vent appliance and what that means for air supply

Describe the function and failure modes of draft hoods, draft proving devices, and vent connectors

Identify common venting defects a technician must flag, such as improper slope, disconnected connectors, and blocked terminations

Describe the sequence of a gas appliance's normal operating cycle from call for heat to shutdown

Identify the safety devices on common residential appliances and explain what each protects against

Explain manifold pressure measurement and what an out-of-spec reading indicates

Describe the procedures for checking gas pressure at the meter, at the appliance inlet, and at the manifold

Describe the installation clearances, venting connections, and gas supply requirements for a typical residential appliance

Explain the steps of a routine service call including visual inspection, combustion analysis, and documentation

Identify when an appliance must be shut off and tagged rather than left in service

Describe how to verify that a newly installed appliance is operating within its rated input and temperature rise

Answer a timed set of practice questions across all four domains and record scores by domain

Review every missed question and write the underlying rule or code reference beside it

Revisit the weakest two domains with targeted review of the reference sheets built in earlier weeks

Confirm readiness by explaining the highest-risk safety procedures out loud without notes