G3 HVAC PrepBOX — Ontario G3 Gas Technician exam preparation
G3 HVAC PrepBOX is a study app for the Ontario G3 Gas Technician
certification exam administered by TSSA. It holds 1,184 practice
questions across the nine syllabus topics, four full practice
tests and a timed Master Exam, plus a Challenge Bank that re-serves every
question you answer incorrectly.
The G3 exam is 165 questions over 3 hours 30 minutes, and the pass mark is
commonly cited as 75%. The free 20-question mock exam needs no account.
The app itself needs JavaScript. Everything below is a plain page that
does not: the exam guide,
the pass mark and how hard the exam is,
free practice questions and
the free calculators.