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TSSA Gas Technician 1 (G.1) Certificate of Qualification — Ontario practice questions are available now; exam metadata is being verified.
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2026 Statistics
Key Facts: TSSA Gas Technician 1 (G1) Exam
75%
Fuels Passing Score
TSSA Examination Prep Guide
3.5 h
Maximum Exam Time
TSSA Examination Prep Guide
26–31
G1 CSA Modules
TSSA Gas/Oil Burner Policies
>400k BTU/h
G1 High-Input Scope Focus
TSSA G.1 / G.2 scope practice
$89
Other Examination Fee (CAD, May 1, 2026)
TSSA Natural Gas & Hydrogen Fee Schedule
500 h
Min. Supervised Hours >400k BTU/h
TSSA G1 admission / O. Reg. 215/01 practice
TSSA G.1 is Ontario’s advanced gas technician certificate for commercial/industrial gas work including equipment over 400,000 BTU/h (no upper input limit). Fuels written exams are multiple choice with a 75% pass mark and up to 3.5 hours; exact G1 item count is not published (Fuels range 50–165). TSSA Other Examination fee is CAD $89 effective May 1, 2026 (Natural Gas & Hydrogen Fee Schedule)—confirm the current schedule. This free bank offers 100 practice MCQs mapped to G1 modules 26–31 and CSA B149.1/B149.2/B149.3 concepts.
Sample TSSA Gas Technician 1 (G1) Practice Questions
Try these sample questions to test your TSSA Gas Technician 1 (G1) exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1Which certificate authorizes unsupervised work on natural gas and propane appliances and equipment in Ontario with no upper input limit, including systems over 400,000 BTU/h?
A.Gas Technician 1 (G.1)
B.Liquid Propane Fitter (LP) only
C.Gas Technician 3 (G.3)
D.Gas Technician 2 (G.2)
Explanation: G.1 is Ontario’s highest gas-technician certificate. It authorizes unsupervised work with no upper input limit, including commercial/industrial systems over 400,000 BTU/h that exceed G.2 scope.
2Per TSSA Gas Technician policies aligned with O. Reg. 215/01 practice, how much supervised high-input experience is typically required before G.1 eligibility?
A.At least 100 hours on any gas appliance under a G.2 certificate holder
B.At least 500 hours on systems with input greater than 400,000 BTU/h under direct G.1 supervision
C.At least 2,000 hours only on residential furnaces under 100,000 BTU/h
D.No high-input hours are required if the candidate holds G.2 for six months
Explanation: G.1 applicants must hold valid G.2 and meet experience rules that include at least 500 hours on systems greater than 400,000 BTU/h under direct supervision of a G.1 certificate holder, in addition to overall G.2 experience thresholds.
3Which CSA code is especially emphasized in G.1 study for field approval of fuel-related components on appliances and equipment?
A.CSA B51 Boiler, Pressure Vessel and Pressure Piping Code
B.CSA B149.2 Propane Storage and Handling Code only
C.CSA B149.3 Code for the field approval of fuel-burning appliances and equipment
D.CSA B139 Installation Code for Oil-Burning Equipment
Explanation: CSA B149.3 addresses field approval of fuel-burning appliances and equipment / fuel-related components. G.1 work on large commercial and industrial systems frequently involves B149.3 concepts alongside B149.1 installation requirements.
4What is the minimum passing grade for TSSA Fuels Safety written certification examinations, including Gas Technician G.1?
A.80%
B.65%
C.70%
D.75%
Explanation: Per the TSSA Certification Examination Preparation Guide, the Fuels program area passing grade is 75%. Other program areas use different pass marks.
5Which accredited G.1 training modules does TSSA list beyond the G.2 curriculum?
A.Modules 26, 27, 28, 29, 30, and 31
B.Modules 1 through 9 only
C.Module 25 Liquid Propane only
D.Modules 10 through 24 only
Explanation: TSSA Gas Technician policies list G.1 as G.3 plus G.2 plus modules 26–31 (flame safeguards; commercial/industrial appliances; gas-fired AC/refrigeration; G1 electricity; G1 controls; valve trains and burners).
6TSSA Fuels written exams are typically which format regarding reference materials?
A.Closed-book with no codes permitted
B.Open-book with permitted unmarked Act, regulations, Code Adoption Documents, and CSA B149 codes
C.Open internet with any online forum allowed
D.Oral only with no written references
Explanation: TSSA Fuels certification exams are multiple-choice and open-book with permitted unmarked codes and regulations (Act, Fuels regulations/CAD, B149.1, and related permitted materials).
7After three unsuccessful TSSA Fuels certification examination attempts, what does O. Reg. 215/01 practice require before another attempt?
A.Only a letter of recommendation from any G.3 holder
B.Immediate re-write the next day with no further training
C.Accredited retraining before another attempt
D.Automatic certificate issuance by challenge
Explanation: After three failures, O. Reg. 215/01 requires accredited retraining before another attempt. Fuels candidates who do not pass may otherwise re-write after the standard waiting period.
8What overall G.2 work experience threshold is commonly required (in addition to high-input hours) for G.1 admission under TSSA policy / O. Reg. 215/01 practice?
A.At least 30 days of G.2-scope work
B.At least 10 years of G.3-only supervised work
C.No experience if the candidate completes any online quiz
D.At least 2 years or 4,000 hours of G.2-scope work
Explanation: Accredited G.1 pathways require a valid G.2 certificate plus at least 2 years or 4,000 hours of G.2 work experience, including the separate ≥500-hour high-input supervised requirement (or an approved challenge pathway).
9Which primary installation code does a G.1 technician apply for natural gas and propane appliance and piping installations in Ontario (with CAD amendments)?
A.CSA B149.1 Natural Gas and Propane Installation Code
B.National Building Code alone without fuels codes
C.CSA C22.1 Canadian Electrical Code as the sole gas piping code
D.ASME B31.1 Power Piping as the only Ontario fuels installation code
Explanation: CSA B149.1 is the primary installation code for natural gas and propane appliances and piping, adopted in Ontario with Code Adoption Document amendments. G.1 candidates also study B149.2 and B149.3 concepts for large equipment.
10Relative to G.2 scope, which statement best describes G.1 authority on input rating?
A.G.1 is limited to residential appliances under 100,000 BTU/h only
B.G.1 has no upper input limit and includes equipment over 400,000 BTU/h
C.G.1 may only work on equipment if a G.3 certificate holder is present
D.G.1 is limited to 400,000 BTU/h maximum, same as G.2
Explanation: G.1 is the advanced certificate with no upper input limit. It specifically covers the commercial/industrial territory above the G.2 400,000 BTU/h ceiling.
About the TSSA Gas Technician 1 (G1) Practice Questions
Verified exam format metadata for TSSA Gas Technician 1 (G.1) Certificate of Qualification — Ontario is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.