ONTARIO GAS TECHNICIAN 1 (G1) CERTIFICATION
EXAM 2026 | ACTUAL AND CURRENTLY TESTING QUESTIONS
WITH VERIFIED ANSWERS AND RATIONALES |
EXPERT VERIFIED FOR GUARANTEED PASS | LATEST UPDATE
SECTION 1: CODES, REGULATIONS & LICENSING (Questions 1-35)
QUESTION 1
What is the minimum passing score required on the TSSA EX 03 Gas Technician 1
Exam to qualify for a G.1 licence?
A) 65%
B) 75%
C) 80%
D) 85%
CORRECT ANSWER: B
RATIONALE: The TSSA requires candidates to achieve a score of 75% or higher on
the EX 03 Gas Technician 1 Exam to qualify for the G.1 licence[reference:4].
QUESTION 2
A G1 licence holder may work on equipment with which BTU input capacity?
A) Up to 400,000 BTU/hr only
B) Any BTU/hr capacity (unrestricted)
C) Up to 1,000,000 BTU/hr only
D) Only appliances under 200,000 BTU/hr
CORRECT ANSWER: B
RATIONALE: G1 is the highest level of gas technician licensing in Ontario,
1
,allowing technicians to work on natural gas and propane equipment of any
BTU/hr capacity without restriction[reference:5].
QUESTION 3
Which of the following codes is the primary governing document for gas
installations in Ontario?
A) CSA B149.3
B) CSA B149.1
C) NFPA 54
D) ASME Section IX
CORRECT ANSWER: B
RATIONALE: CSA B149.1, the Natural Gas and Propane Installation Code, is the
primary code governing gas installations in Ontario[reference:6].
QUESTION 4
Which regulation under the Technical Standards and Safety Act, 2000, governs
the licensing and certification of Gas Technicians in Ontario?
A) O. Reg. 211/01
B) O. Reg. 212/01
C) O. Reg. 213/01
D) O. Reg. 215/01
CORRECT ANSWER: D
RATIONALE: Ontario Regulation 215/01 (Fuel Industry Certificates) specifically
mandates the certification, training, and scope of practice requirements for
gas technicians and operators under the TSSA[reference:7].
2
,QUESTION 5
What is the scope of practice for a G1 gas technician regarding propane
systems?
A) Only propane appliances up to 400,000 BTU/hr
B) Any propane appliance of any BTU/hr capacity
C) Only propane storage tanks up to 500 gallons
D) Only propane appliances in residential settings
CORRECT ANSWER: B
RATIONALE: A G1 license holder may work on natural gas or propane equipment
of
any BTU/hr capacity without restriction[reference:8].
QUESTION 6
How often must a G1 license be renewed in Ontario?
A) Annually
B) Every 2 years
C) Every 3 years
D) Every 5 years
CORRECT ANSWER: C
RATIONALE: TSSA gas technician licenses must be renewed every 3 years to
ensure technicians remain current with code changes and industry practices.
QUESTION 7
3
, What is the purpose of CSA B149.2?
A) Natural Gas and Propane Installation Code
B) Propane Storage and Handling Code
C) Code for Gas-fired Appliances
D) Code for Venting Systems
CORRECT ANSWER: B
RATIONALE: CSA B149.2 is the Propane Storage and Handling Code, which covers
the storage, handling, and installation of propane systems[reference:9].
QUESTION 8
Which organization is responsible for administering gas technician
certification exams in Ontario?
A) CSA Group
B) TSSA (Technical Standards and Safety Authority)
C) Ontario Ministry of Labour
D) Canadian Gas Association
CORRECT ANSWER: B
RATIONALE: The Technical Standards and Safety Authority (TSSA) administers the
gas technician certification program and examinations in Ontario[reference:10].
QUESTION 9
What documentation must be retained for a gas installation according to CSA
B149.1?
A) Only the gas meter number
4
EXAM 2026 | ACTUAL AND CURRENTLY TESTING QUESTIONS
WITH VERIFIED ANSWERS AND RATIONALES |
EXPERT VERIFIED FOR GUARANTEED PASS | LATEST UPDATE
SECTION 1: CODES, REGULATIONS & LICENSING (Questions 1-35)
QUESTION 1
What is the minimum passing score required on the TSSA EX 03 Gas Technician 1
Exam to qualify for a G.1 licence?
A) 65%
B) 75%
C) 80%
D) 85%
CORRECT ANSWER: B
RATIONALE: The TSSA requires candidates to achieve a score of 75% or higher on
the EX 03 Gas Technician 1 Exam to qualify for the G.1 licence[reference:4].
QUESTION 2
A G1 licence holder may work on equipment with which BTU input capacity?
A) Up to 400,000 BTU/hr only
B) Any BTU/hr capacity (unrestricted)
C) Up to 1,000,000 BTU/hr only
D) Only appliances under 200,000 BTU/hr
CORRECT ANSWER: B
RATIONALE: G1 is the highest level of gas technician licensing in Ontario,
1
,allowing technicians to work on natural gas and propane equipment of any
BTU/hr capacity without restriction[reference:5].
QUESTION 3
Which of the following codes is the primary governing document for gas
installations in Ontario?
A) CSA B149.3
B) CSA B149.1
C) NFPA 54
D) ASME Section IX
CORRECT ANSWER: B
RATIONALE: CSA B149.1, the Natural Gas and Propane Installation Code, is the
primary code governing gas installations in Ontario[reference:6].
QUESTION 4
Which regulation under the Technical Standards and Safety Act, 2000, governs
the licensing and certification of Gas Technicians in Ontario?
A) O. Reg. 211/01
B) O. Reg. 212/01
C) O. Reg. 213/01
D) O. Reg. 215/01
CORRECT ANSWER: D
RATIONALE: Ontario Regulation 215/01 (Fuel Industry Certificates) specifically
mandates the certification, training, and scope of practice requirements for
gas technicians and operators under the TSSA[reference:7].
2
,QUESTION 5
What is the scope of practice for a G1 gas technician regarding propane
systems?
A) Only propane appliances up to 400,000 BTU/hr
B) Any propane appliance of any BTU/hr capacity
C) Only propane storage tanks up to 500 gallons
D) Only propane appliances in residential settings
CORRECT ANSWER: B
RATIONALE: A G1 license holder may work on natural gas or propane equipment
of
any BTU/hr capacity without restriction[reference:8].
QUESTION 6
How often must a G1 license be renewed in Ontario?
A) Annually
B) Every 2 years
C) Every 3 years
D) Every 5 years
CORRECT ANSWER: C
RATIONALE: TSSA gas technician licenses must be renewed every 3 years to
ensure technicians remain current with code changes and industry practices.
QUESTION 7
3
, What is the purpose of CSA B149.2?
A) Natural Gas and Propane Installation Code
B) Propane Storage and Handling Code
C) Code for Gas-fired Appliances
D) Code for Venting Systems
CORRECT ANSWER: B
RATIONALE: CSA B149.2 is the Propane Storage and Handling Code, which covers
the storage, handling, and installation of propane systems[reference:9].
QUESTION 8
Which organization is responsible for administering gas technician
certification exams in Ontario?
A) CSA Group
B) TSSA (Technical Standards and Safety Authority)
C) Ontario Ministry of Labour
D) Canadian Gas Association
CORRECT ANSWER: B
RATIONALE: The Technical Standards and Safety Authority (TSSA) administers the
gas technician certification program and examinations in Ontario[reference:10].
QUESTION 9
What documentation must be retained for a gas installation according to CSA
B149.1?
A) Only the gas meter number
4
