ONTARIO GAS TECHNICIAN 1 (G1) CERTIFICATION EXAM COMPLETE QUESTIONS AND DETAILED SOLUTIONS LATEST UPDATE THIS YEAR JUST RELEASED

ONTARIO GAS TECHNICIAN 1 (G1)
CERTIFICATION EXAM COMPLETE
QUESTIONS AND DETAILED SOLUTIONS
LATEST UPDATE THIS YEAR JUST
RELEASED



Ontario Gas Technician 1 (G1) Certification Examination –
Actual Exam Coverage
The Ontario Gas Technician 1 (G1) Certification
Examination evaluates advanced gas technician
knowledge required for unrestricted gas work in
accordance with Ontario regulations, the Technical
Standards and Safety Authority requirements, fuel codes,
combustion principles, industrial/commercial gas systems,
controls, venting, piping, commissioning, troubleshooting,
and safety management.
The exam typically covers:


 Gas laws, combustion, and fuel properties
 Ontario gas regulations and CSA code requirements
 Commercial/industrial appliance installation

,  Pipe sizing and gas supply calculations
 Pressure regulators and gas trains
 Boiler, burner, and furnace operations
 Venting and combustion air systems
 Electrical troubleshooting and control circuits
 Flame safeguard programming and sequencing
 Combustion analysis and efficiency optimization
 Leak testing, purging, and commissioning
 Safety systems and emergency procedures
 Troubleshooting ignition and burner failures
 CO testing and hazardous condition response
 Preventive maintenance and documentation


1.
A commercial boiler repeatedly locks out during ignition
because the flame safeguard controller fails to detect flame
signal within trial-for-ignition timing. Which condition is
MOST likely responsible?
A. Excessive manifold pressure causing delayed ignition
B. Faulty flame rectification signal returning insufficient
microamps

,C. Low incoming water temperature entering boiler loop
D. Oversized combustion air openings reducing room
temperature
Answer: B
Rationale:
Flame safeguard systems rely on flame rectification signals
measured in microamps. If insufficient flame signal returns
to the controller, the system interprets this as flame failure
and locks out for safety. Delayed ignition from pressure
issues may contribute, but flame signal failure is the direct
cause.


2.
During a pressure test on newly installed commercial gas
piping, a technician notices pressure dropping slowly over
fifteen minutes. What should be performed FIRST?
A. Introduce propane into the piping for operational
verification
B. Energize appliance valves to confirm seating capability
C. Isolate sections and perform leak detection procedures
D. Increase test pressure above code requirements
temporarily
Answer: C

, Rationale:
A pressure drop during testing indicates a leak or improper
isolation. The technician must isolate piping sections and
locate leaks using approved procedures before any
operation or commissioning occurs.


3.
A Category IV condensing appliance requires special
venting materials primarily because flue gases:
A. Contain excessive oxygen levels damaging galvanized
steel
B. Exit at temperatures exceeding masonry chimney
ratings
C. Produce acidic condensate capable of corroding
standard vents
D. Create positive pressure only during summer operation
Answer: C
Rationale:
Condensing appliances generate acidic condensate due to
low flue gas temperatures and high efficiency operation.
Standard vent materials may corrode rapidly; therefore
corrosion-resistant venting materials are required.