Ontario G3 Gas Technician exam preparation
Home › Appliances and Heat Transfer
Furnaces, boilers, heat exchangers, temperature rise and appliance servicing.
The practical end of the syllabus — what the equipment does, how heat moves through it, and what to do when something is wrong. Several questions test judgement rather than recall: given a fault, what is the correct response.
Furnaces, boilers, heat exchangers, temperature rise and appliance servicing. The question bank holds 136 questions in this area, out of 1,184 across the whole syllabus.
Where a question describes a defective heat exchanger or an unsafe appliance, the safe answer is almost always the correct one. The exam is testing whether you will take a shortcut, and it expects you not to.
Appliance categories and venting →
Five real questions from this topic, with the answers shown. The app holds 136 in this area alone, out of 1,184 across the whole syllabus.
What common appliance uses piezoelectricity?
What is the maximum BTU input rating for appliances that a G.2 certificate holder may install, inspect, alter, purge, activate, repair, service or remove?
Within what timeframe must a certificate holder give written notice to the distributor after finding an appliance in an unacceptable condition (not an immediate hazard)?
Which testing agency is NOT recognized for certifying propane appliances in the Province of Ontario?
What type of heat transfer would you find in an infrared (tube) heater?
The syllabus spans 9 areas. The other 8: