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G2 Exam Preparation Version 2 – 2025 Ontario G2 Practice Test
with Real-World Driving Questions & Updated Study Guide
Ace your 2025 Ontario G2 driving exam with G2 Exam Preparation Version 2. This updated
free practice test includes new road signs, advanced driving scenarios, and the latest G2 test
questions. Study smarter and pass your G2 road or written test on the first try!
G2 exam preparation version 2
Ontario G2 driving test 2025
G2 advanced practice test
2025 G2 written exam questions
Which of the following senses the temperature of the flame - ANSWER-Thermocouple
Regarding the forced that effect heat, air, and moisture flow in a building, which of these is an example
of distribution effect - ANSWER-The design or workmen shop of the central ventilation or forced air
heating system
The pressure difference produced by a pump between its inlet and outlet ports is a partial definition of -
ANSWER-Pump head
Which meter corrects for temperature and pressure? - ANSWER-Diaphragm meter
What is the minimum distance to combustible materials from the top of a plenum of a conventional
forced warm air furnace - ANSWER-1 inch
,2|Page
What causes air to flow - ANSWER-Air flows from high to low pressure. Air also flows due to the stack
effect, wind effect, flue and ventilation effect, and distribution effect.
Where and how shall temp sensors be mounted - ANSWER-In wells or fastened directly to metal pipes
according to manufactures instructions
What Is the remedy if a power pack fails in a electronic air cleaner - ANSWER-Replace it with a
manufacturers accepted replacement
After welding is completed in an area where combustibles material is present, how long shall a fire watch
be maintained - ANSWER-30 mins
What is used to remove the start winding from operation when the motor reaches approximately 75% of
normal operating speed - ANSWER-A solid state relay
What is the expected steady state of a unvented space heater - ANSWER-90.50%
What step my best completed when checking the high limit operation on a conventional furnace with a
fan center installed - ANSWER-Blower belt must be removed
When a Gas Fired Appliance is vented into a chimney flue serving an appliance which burns a solid fuel in
a Commercial or Industrial application, How shall the Vent from the Gas Appliance be installed? -
ANSWER-Through a separate Flue opening above the Flue Pipe connection from the other appliance
To ensure that negative building pressure never causes pressure induced back drafting - ANSWER-Use
sealed combustion, direct vent appliances
When propane is to be used in the construction repair or improvement of a building, how many 100lb
cylinders may be manifolded together and used indoors? - ANSWER-3
When a propane appliance is to be connected into the same chimney serving an oil fired appliance, the
vent connector from the appliance shall be? - ANSWER-Through a separate flue opening above the flue
opening of the liquid filled appliance
, 3|Page
On seasonal start up, a pool heater should run: - ANSWER-Continuously until the t-stay is satisfied
The maximum gas pressure allowed in a recreational vehicle or mobile home is - ANSWER-13" w.c
In order to prevent condensation from forming in the outside of the ducts, the ducts must be - ANSWER-
Insulated on the outside
Which of the following uses a starting relay - ANSWER-A capacitor start motor
In which type of furnace would you find an auxiliary limit contril - ANSWER-On horizontal or down flow
furnace
Why is it important to verify the calibration of an oven control - ANSWER-To ensure safe an efficient
operation and satisfaction
If more excess air is added to the flue gas, what effect will this have on combustion efficiency and carbon
dioxide levels - ANSWER-Efficiency decreases, carbon dioxide level decreases
What is a dedicated water heating system used for - ANSWER-Hydronic radiant heating
What is done to keep air balanced in the building - ANSWER-Make sure the amount of air entering the
building is the same as the amount exiting
The electrical service applied to a building is measured in what units - ANSWER-Amperes
The minimum allowable distance to be maintained from a 50,000 btu water heater flue outlet to a gas
utility service regulator vent opening is - ANSWER-3ft
The minimum closed circuit test reading of a thermocouple should be - ANSWER-10mv
G2 Exam Preparation Version 2 – 2025 Ontario G2 Practice Test
with Real-World Driving Questions & Updated Study Guide
Ace your 2025 Ontario G2 driving exam with G2 Exam Preparation Version 2. This updated
free practice test includes new road signs, advanced driving scenarios, and the latest G2 test
questions. Study smarter and pass your G2 road or written test on the first try!
G2 exam preparation version 2
Ontario G2 driving test 2025
G2 advanced practice test
2025 G2 written exam questions
Which of the following senses the temperature of the flame - ANSWER-Thermocouple
Regarding the forced that effect heat, air, and moisture flow in a building, which of these is an example
of distribution effect - ANSWER-The design or workmen shop of the central ventilation or forced air
heating system
The pressure difference produced by a pump between its inlet and outlet ports is a partial definition of -
ANSWER-Pump head
Which meter corrects for temperature and pressure? - ANSWER-Diaphragm meter
What is the minimum distance to combustible materials from the top of a plenum of a conventional
forced warm air furnace - ANSWER-1 inch
,2|Page
What causes air to flow - ANSWER-Air flows from high to low pressure. Air also flows due to the stack
effect, wind effect, flue and ventilation effect, and distribution effect.
Where and how shall temp sensors be mounted - ANSWER-In wells or fastened directly to metal pipes
according to manufactures instructions
What Is the remedy if a power pack fails in a electronic air cleaner - ANSWER-Replace it with a
manufacturers accepted replacement
After welding is completed in an area where combustibles material is present, how long shall a fire watch
be maintained - ANSWER-30 mins
What is used to remove the start winding from operation when the motor reaches approximately 75% of
normal operating speed - ANSWER-A solid state relay
What is the expected steady state of a unvented space heater - ANSWER-90.50%
What step my best completed when checking the high limit operation on a conventional furnace with a
fan center installed - ANSWER-Blower belt must be removed
When a Gas Fired Appliance is vented into a chimney flue serving an appliance which burns a solid fuel in
a Commercial or Industrial application, How shall the Vent from the Gas Appliance be installed? -
ANSWER-Through a separate Flue opening above the Flue Pipe connection from the other appliance
To ensure that negative building pressure never causes pressure induced back drafting - ANSWER-Use
sealed combustion, direct vent appliances
When propane is to be used in the construction repair or improvement of a building, how many 100lb
cylinders may be manifolded together and used indoors? - ANSWER-3
When a propane appliance is to be connected into the same chimney serving an oil fired appliance, the
vent connector from the appliance shall be? - ANSWER-Through a separate flue opening above the flue
opening of the liquid filled appliance
, 3|Page
On seasonal start up, a pool heater should run: - ANSWER-Continuously until the t-stay is satisfied
The maximum gas pressure allowed in a recreational vehicle or mobile home is - ANSWER-13" w.c
In order to prevent condensation from forming in the outside of the ducts, the ducts must be - ANSWER-
Insulated on the outside
Which of the following uses a starting relay - ANSWER-A capacitor start motor
In which type of furnace would you find an auxiliary limit contril - ANSWER-On horizontal or down flow
furnace
Why is it important to verify the calibration of an oven control - ANSWER-To ensure safe an efficient
operation and satisfaction
If more excess air is added to the flue gas, what effect will this have on combustion efficiency and carbon
dioxide levels - ANSWER-Efficiency decreases, carbon dioxide level decreases
What is a dedicated water heating system used for - ANSWER-Hydronic radiant heating
What is done to keep air balanced in the building - ANSWER-Make sure the amount of air entering the
building is the same as the amount exiting
The electrical service applied to a building is measured in what units - ANSWER-Amperes
The minimum allowable distance to be maintained from a 50,000 btu water heater flue outlet to a gas
utility service regulator vent opening is - ANSWER-3ft
The minimum closed circuit test reading of a thermocouple should be - ANSWER-10mv
