G2 GAS TECHNICIAN BUNDLED EXAMS
STUDY GUIDE 2026 COMPLETE QUESTIONS
WITH CORRECT DETAILED ANSWERS ||
100% GUARANTEED PASS <RECENT
VERSION>
Section 1: Acts, Regulations, and Safety Standards
1. Which regulation under the Technical Standards and Safety Act (TSSA)
governs the installation of gas appliances in Ontario?
a) Ontario Regulation 212/01
b) Ontario Regulation 211/01
c) Ontario Regulation 201/01
d) Ontario Regulation 220/01
*ANSWER: B) O. Reg. 211/01, known as the "Gasoline Safety Code," is the
specific regulation governing fuel-related activities.*
2. Who is legally responsible for the safe installation of a gas appliance?
a) The property owner
b) The manufacturer
c) The gas technician who performs the installation
d) The distributor who sold the appliance
*ANSWER: C) The certified gas technician is legally responsible for the work
they perform, as per O. Reg. 211/01.*
3. Before working on a gas system, a G2 technician must ensure:
a) The system is under pressure
b) The system is positively isolated from all gas sources
c) The pilot light is lit to verify flow
d) The main electrical disconnect is locked out
, ANSWER: B) Positive isolation (e.g., closing a valve and tagging it) is the
primary safety step. Lockout is for electrical safety.
4. A "hazard" is best defined as:
a) An accident waiting to happen
b) A physical situation with the potential for human injury or damage to
property
c) The likelihood of an incident occurring
d) The severity of the consequences of an accident
ANSWER: B) This is the standard definition of a hazard in safety
management systems.
5. What is the primary purpose of the Canadian Gas Association (CGA)?
a) To certify gas technicians
b) To enforce provincial regulations
c) To develop national standards for gas appliances and equipment
d) To set natural gas rates for consumers
ANSWER: C) The CGA develops standards that are often adopted into
provincial regulations.
Section 2: Gas Properties and Combustion
6. The primary component of Natural Gas is:
a) Propane (C3H8)
b) Butane (C4H10)
c) Methane (CH4)
d) Carbon Dioxide (CO2)
*ANSWER: C) Methane (CH4) typically makes up 90-95% of natural gas.*
7. What is the specific gravity of Natural Gas?
a) 1.0
b) 1.53
c) 0.60
d) 2.00
ANSWER: C) Natural gas is lighter than air (Specific Gravity < 1.0).
, 8. The expansion ratio of liquid propane to vapour is approximately:
a) 1:270
b) 1:100
c) 1:50
d) 1:10
ANSWER: A) One volume of liquid propane will expand to about 270
volumes of vapour, which is why proper container filling is critical.
9. Complete combustion requires a sufficient supply of:
a) Gas and heat
b) Gas and oxygen
c) Oxygen and nitrogen
d) Heat and a pilot light
ANSWER: B) The "fire triangle" requires Fuel (gas), Heat, and an Oxidizer
(oxygen).
10.The products of complete combustion are:
a) Carbon Dioxide and Water Vapour
b) Carbon Monoxide and Water Vapour
c) Carbon Dioxide and Oxygen
d) Carbon Monoxide and Soot
ANSWER: A) With sufficient air, hydrocarbon fuels like natural gas and
propane burn completely to CO₂ and H₂O.
11.Incomplete combustion is often indicated by:
a) A crisp, blue flame
b) A floating, yellow, and lazy flame
c) A high-pitched whistling sound
d) White smoke from the vent
ANSWER: B) A yellow flame indicates carbon particles (soot) are being
produced, a sign of incomplete combustion.
12.The correct term for the theoretical amount of air required for complete
combustion is:
STUDY GUIDE 2026 COMPLETE QUESTIONS
WITH CORRECT DETAILED ANSWERS ||
100% GUARANTEED PASS <RECENT
VERSION>
Section 1: Acts, Regulations, and Safety Standards
1. Which regulation under the Technical Standards and Safety Act (TSSA)
governs the installation of gas appliances in Ontario?
a) Ontario Regulation 212/01
b) Ontario Regulation 211/01
c) Ontario Regulation 201/01
d) Ontario Regulation 220/01
*ANSWER: B) O. Reg. 211/01, known as the "Gasoline Safety Code," is the
specific regulation governing fuel-related activities.*
2. Who is legally responsible for the safe installation of a gas appliance?
a) The property owner
b) The manufacturer
c) The gas technician who performs the installation
d) The distributor who sold the appliance
*ANSWER: C) The certified gas technician is legally responsible for the work
they perform, as per O. Reg. 211/01.*
3. Before working on a gas system, a G2 technician must ensure:
a) The system is under pressure
b) The system is positively isolated from all gas sources
c) The pilot light is lit to verify flow
d) The main electrical disconnect is locked out
, ANSWER: B) Positive isolation (e.g., closing a valve and tagging it) is the
primary safety step. Lockout is for electrical safety.
4. A "hazard" is best defined as:
a) An accident waiting to happen
b) A physical situation with the potential for human injury or damage to
property
c) The likelihood of an incident occurring
d) The severity of the consequences of an accident
ANSWER: B) This is the standard definition of a hazard in safety
management systems.
5. What is the primary purpose of the Canadian Gas Association (CGA)?
a) To certify gas technicians
b) To enforce provincial regulations
c) To develop national standards for gas appliances and equipment
d) To set natural gas rates for consumers
ANSWER: C) The CGA develops standards that are often adopted into
provincial regulations.
Section 2: Gas Properties and Combustion
6. The primary component of Natural Gas is:
a) Propane (C3H8)
b) Butane (C4H10)
c) Methane (CH4)
d) Carbon Dioxide (CO2)
*ANSWER: C) Methane (CH4) typically makes up 90-95% of natural gas.*
7. What is the specific gravity of Natural Gas?
a) 1.0
b) 1.53
c) 0.60
d) 2.00
ANSWER: C) Natural gas is lighter than air (Specific Gravity < 1.0).
, 8. The expansion ratio of liquid propane to vapour is approximately:
a) 1:270
b) 1:100
c) 1:50
d) 1:10
ANSWER: A) One volume of liquid propane will expand to about 270
volumes of vapour, which is why proper container filling is critical.
9. Complete combustion requires a sufficient supply of:
a) Gas and heat
b) Gas and oxygen
c) Oxygen and nitrogen
d) Heat and a pilot light
ANSWER: B) The "fire triangle" requires Fuel (gas), Heat, and an Oxidizer
(oxygen).
10.The products of complete combustion are:
a) Carbon Dioxide and Water Vapour
b) Carbon Monoxide and Water Vapour
c) Carbon Dioxide and Oxygen
d) Carbon Monoxide and Soot
ANSWER: A) With sufficient air, hydrocarbon fuels like natural gas and
propane burn completely to CO₂ and H₂O.
11.Incomplete combustion is often indicated by:
a) A crisp, blue flame
b) A floating, yellow, and lazy flame
c) A high-pitched whistling sound
d) White smoke from the vent
ANSWER: B) A yellow flame indicates carbon particles (soot) are being
produced, a sign of incomplete combustion.
12.The correct term for the theoretical amount of air required for complete
combustion is:
