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100+ Free TSSA Gas Technician 2 (G2) Practice Questions
TSSA Gas Technician 2 (G.2) 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 2 (G2) Exam
75%
Fuels Passing Score
TSSA Examination Prep Guide
3.5 h
Maximum Exam Time
TSSA Examination Prep Guide
10–24
G2 CSA Modules
TSSA Gas/Oil Burner Policies
400k BTU/h
Typical G2 Max Appliance Input
TSSA G.2 / G.1 scope practice
$89
Other Examination Fee (CAD, May 1, 2026)
TSSA Natural Gas & Hydrogen Fee Schedule
30 days
Fuels Re-Write Wait
TSSA Examination Prep Guide
TSSA G.2 is Ontario’s intermediate gas technician certificate for unsupervised residential and light-commercial gas work (≤400,000 BTU/h) after G.3. Fuels written exams are multiple choice with a 75% pass mark and up to 3.5 hours; exact G2 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 G2 modules 10–24 and CSA B149.1/B149.2.
Sample TSSA Gas Technician 2 (G2) Practice Questions
Try these sample questions to test your TSSA Gas Technician 2 (G2) exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1Which code is the primary installation standard a TSSA Gas Technician 2 applies when installing natural gas and propane appliances and piping in Ontario?
A.National Plumbing Code of Canada
B.CSA B149.1 Natural Gas and Propane Installation Code
C.CSA B51 Boiler, Pressure Vessel and Pressure Piping Code
D.CSA B139 Installation Code for Oil-Burning Equipment
Explanation: CSA B149.1 is adopted for gaseous fuels installation work in Ontario (with Code Adoption Document amendments). G2 candidates are expected to use B149.1 together with the Act, Fuels regulations, and CAD during the open-book written exam.
2Which CSA code governs propane storage and handling, separate from appliance and piping installation?
A.CSA B108
B.CSA B149.2
C.CSA B149.3
D.CSA B149.1
Explanation: CSA B149.2, the Propane Storage and Handling Code, covers storage, handling, and transfer of propane including cylinders and tanks. CSA B149.1 covers installation of appliances and piping for both natural gas and propane.
3What is the minimum passing grade for TSSA Fuels Safety written certification examinations, including Gas Technician exams?
A.65%
B.80%
C.70%
D.75%
Explanation: Per the TSSA Certification Examination Preparation Guide, the Fuels program area passing grade is 75%. Elevating/Amusement/Ski Lift exams use 70%, and Operating Engineers use 65%.
4A candidate for a TSSA Gas Technician 2 (G.2) certificate must first hold which prerequisite certificate?
A.Gas Technician 3 (G.3)
B.Liquid Propane (LP) endorsement
C.Oil Burner Technician 3 (OBT-3)
D.Gas Technician 1 (G.1)
Explanation: TSSA Gas Technician/Oil Burner Technician Policies require G.2 candidates to have completed the G.3 program and hold a valid G.3 certificate (unless an approved assessment/exemption pathway applies).
5Within typical Ontario G.2 practice, a Gas Technician 2 works unsupervised on gas appliances up to approximately what maximum input?
A.200,000 BTU/h
B.Unlimited input
C.400,000 BTU/h
D.100,000 BTU/h
Explanation: G.2 is the intermediate certificate for residential and light-commercial equipment. Advancement toward G.1 requires documented experience on systems over 400,000 BTU/h under G.1 supervision, which demarcates the G.2 input scope used in Ontario training and practice.
6For a TSSA Gas Technician 2/3 Fuels written exam, which statement about reference materials is correct?
A.No code books are allowed; the exam is fully closed-book
B.Candidates may use smartphones to look up CSA clauses
C.Candidates may bring unmarked permitted codes and regulations (highlighting and page dividers allowed)
D.Only photocopies of highlighted study notes are permitted
Explanation: The TSSA Examination Prep Guide states Fuels candidates must bring their own permitted reference materials (Act, regulations, CAD, B149.1/B149.2). Materials must be unmarked/unaltered except for page/section dividers or highlighting of sections, words, or clauses. Electronics are prohibited.
7If a Fuels candidate fails a TSSA multiple-choice examination, when are they typically eligible to re-write?
A.After 30 days
B.Immediately the next day
C.After 14 days
D.After 60 days
Explanation: The TSSA Certification Examination Preparation Guide lists a 30-day re-write eligibility period for Fuels (and Elevating/Amusement/Ski Lift and BPV). Operating Engineers wait 60 days.
8Before installing a gas appliance, a G2 technician must verify the equipment is approved. Which evidence best confirms approval for use in Canada/Ontario?
A.A manufacturer warranty card
B.A purchase invoice only
C.A recognized certification/approval mark (e.g., CSA, cUL) or provincial field approval
D.A model number printed on the carton
Explanation: CSA B149.1 requires appliances and accessories to be certified by an accredited agency bearing a recognized certification mark, or to hold an applicable provincial/special field approval. Uncertified equipment must not be installed.
9What is the primary purpose of a drip leg (dirt pocket) installed in a gas supply line ahead of an appliance?
A.Collect moisture, scale, and debris before they enter the appliance controls
B.Reduce specific gravity of the fuel gas
C.Increase manifold pressure
D.Act as a primary shut-off valve
Explanation: A drip leg/dirt pocket traps condensate, scale, and debris so they do not foul regulators, valves, or burners. CSA B149.1 piping rules require drip legs where needed based on piping orientation and appliance connections.
10When sizing gas piping or tubing for an appliance system, the technician must primarily ensure that:
A.All piping is oversized to at least 2-inch schedule 40
B.Only the shortest possible run is used, regardless of diameter
C.Pipe diameter is the same as the water line
D.Pressure drop under load stays within allowable limits so appliance inlet pressure remains adequate
Explanation: Piping/tubing is sized so that friction losses do not drop supply pressure below the appliance’s required inlet pressure at design load. CSA B149.1 provides allowable pressure and pressure-drop criteria and sizing methods/tables.
About the TSSA Gas Technician 2 (G2) Practice Questions
Verified exam format metadata for TSSA Gas Technician 2 (G.2) 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.