TSSA G3 EXAM STUDY GUIDE 2026
COMPLETE QUESTIONS WITH CORRECT
DETAILED ANSWERS || 100% GUARANTEED
PASS <RECENT VERSION>
Section 1: Acts, Regulations, and Safety (Questions 1-20)
1. What is the primary purpose of the Ontario Technical Standards and Safety
Act (TSSA)?
a) To set prices for fuel in Ontario
b) To enforce the Ontario Building Code
c) To administer and enforce technical standards to enhance public safety
d) To manage electrical utility companies
2. Which regulation under the TSSA specifically governs the operation of oil
and gas burning equipment?
a) Regulation 219/01 - Operating Engineers
b) Regulation 212/00 - Boilers and Pressure Vessels
c) Regulation 211/01 - Oil and Gas Pipeline Systems
d) Regulation 215/01 - Fuel Industry Certificates
3. A G3 certificate allows the holder to work on natural gas equipment with an
input rating up to:
a) 100,000 BTU/h
b) 400,000 BTU/h
c) 1,000,000 BTU/h
d) There is no limit
4. What is the minimum required clearance for a single wall vent connector
from combustible material?
a) 6 inches (150 mm)
b) 1 inch (25 mm)
c) 18 inches (450 mm)
d) 2 inches (50 mm)
,5. Before working on a gas appliance, what is the FIRST step a technician
must take?
a) Check for gas leaks
b) Shut off the gas supply to the appliance
c) Disconnect the electrical power
d) Take the appliance apart
6. The primary purpose of a sediment trap (drip leg) is to:
a) Reduce the gas pressure
b) Catch moisture and debris before it enters the appliance controls
c) Act as a shut-off valve
d) Vent excess gas to the atmosphere
7. What is the maximum allowable working pressure (MAWP) for a standard
low-pressure natural gas system in a residential building?
a) 0.25 psi or 7 inches WC
b) 2.0 psi
c) 5.0 psi
d) 60 psi
8. A "lock-out/tag-out" procedure is used to:
a) Identify a correctly installed appliance
b) Prevent the accidental energizing of a system during maintenance
c) Calibrate a gas valve
d) Seal a gas line for a pressure test
9. The color code for a natural gas piping system, when identified, is:
a) Yellow
b) Red
c) Green
d) Blue
10. Who is ultimately responsible for the safety of a gas installation?
a) The property owner
b) The gas utility company
, c) The installing certified gas technician
d) The appliance manufacturer
11. A G3 technician may supervise which of the following?
a) A G2 technician
b) A G1 technician
c) An apprentice gas fitter
d) No one
12. A "hazard" is best defined as:
a) An accident that has already happened
b) A potential source of harm
c) The likelihood of an incident occurring
d) A safety procedure
13. The minimum size for a drip leg is:
a) 1 inch in length
b) 2 inches in length
c) 3 inches in length
d) The same diameter as the gas line
14. The purpose of a union in a gas line is to:
a) Support the pipe
b) Allow for easy disassembly of the piping
c) Change the direction of the pipe
d) Reduce pressure
15. A gas leak must be investigated using:
a) A match or open flame
b) An approved gas leak detector or soap solution
c) Listening for a hissing sound only
d) Smelling for gas only
16. If you discover a major gas leak inside a building, your FIRST action
should be to:
a) Immediately shut off the gas at the meter
b) Open all the windows
COMPLETE QUESTIONS WITH CORRECT
DETAILED ANSWERS || 100% GUARANTEED
PASS <RECENT VERSION>
Section 1: Acts, Regulations, and Safety (Questions 1-20)
1. What is the primary purpose of the Ontario Technical Standards and Safety
Act (TSSA)?
a) To set prices for fuel in Ontario
b) To enforce the Ontario Building Code
c) To administer and enforce technical standards to enhance public safety
d) To manage electrical utility companies
2. Which regulation under the TSSA specifically governs the operation of oil
and gas burning equipment?
a) Regulation 219/01 - Operating Engineers
b) Regulation 212/00 - Boilers and Pressure Vessels
c) Regulation 211/01 - Oil and Gas Pipeline Systems
d) Regulation 215/01 - Fuel Industry Certificates
3. A G3 certificate allows the holder to work on natural gas equipment with an
input rating up to:
a) 100,000 BTU/h
b) 400,000 BTU/h
c) 1,000,000 BTU/h
d) There is no limit
4. What is the minimum required clearance for a single wall vent connector
from combustible material?
a) 6 inches (150 mm)
b) 1 inch (25 mm)
c) 18 inches (450 mm)
d) 2 inches (50 mm)
,5. Before working on a gas appliance, what is the FIRST step a technician
must take?
a) Check for gas leaks
b) Shut off the gas supply to the appliance
c) Disconnect the electrical power
d) Take the appliance apart
6. The primary purpose of a sediment trap (drip leg) is to:
a) Reduce the gas pressure
b) Catch moisture and debris before it enters the appliance controls
c) Act as a shut-off valve
d) Vent excess gas to the atmosphere
7. What is the maximum allowable working pressure (MAWP) for a standard
low-pressure natural gas system in a residential building?
a) 0.25 psi or 7 inches WC
b) 2.0 psi
c) 5.0 psi
d) 60 psi
8. A "lock-out/tag-out" procedure is used to:
a) Identify a correctly installed appliance
b) Prevent the accidental energizing of a system during maintenance
c) Calibrate a gas valve
d) Seal a gas line for a pressure test
9. The color code for a natural gas piping system, when identified, is:
a) Yellow
b) Red
c) Green
d) Blue
10. Who is ultimately responsible for the safety of a gas installation?
a) The property owner
b) The gas utility company
, c) The installing certified gas technician
d) The appliance manufacturer
11. A G3 technician may supervise which of the following?
a) A G2 technician
b) A G1 technician
c) An apprentice gas fitter
d) No one
12. A "hazard" is best defined as:
a) An accident that has already happened
b) A potential source of harm
c) The likelihood of an incident occurring
d) A safety procedure
13. The minimum size for a drip leg is:
a) 1 inch in length
b) 2 inches in length
c) 3 inches in length
d) The same diameter as the gas line
14. The purpose of a union in a gas line is to:
a) Support the pipe
b) Allow for easy disassembly of the piping
c) Change the direction of the pipe
d) Reduce pressure
15. A gas leak must be investigated using:
a) A match or open flame
b) An approved gas leak detector or soap solution
c) Listening for a hissing sound only
d) Smelling for gas only
16. If you discover a major gas leak inside a building, your FIRST action
should be to:
a) Immediately shut off the gas at the meter
b) Open all the windows
