G2 Gas Technician Module 17 Revised
Questions with 100% Correct Answers |
Verified | Latest Update 2026
What are the factors governing a conversion? - CORRECT ANSWERS Availability of gas,
efficiency if converted, access to combustible air, satisfactory ductwork, can a chimney liner be installed,
clearances from combustibles, manufactures recommendations, if a water heater is also being installed
(common vent or power vent), and age of the appliance
Oil fired furnaces are recommended not to be converted at a certain age what is age is this? - CORRECT
ANSWERS 10 years clause 4.3.5
What are the responsibilities of the installer when converting? - CORRECT ANSWERS
Determine that it can accept gas and will operate satisfactory for a reasonable length of time.
What must be done when converting a boiler? - CORRECT ANSWERS 1. Check for revirtible
flue; center line must be at leas 12" above burner port
2. Visually inspect for leaks
3. Open drain at bottom and flush until water is clear
4. Sediment can hide a leak at the bottom
Where must a pressure relief drop tube be located on a boiler? - CORRECT ANSWERS The
pressure relief tube must be withing 12" of the floor
What must be done if a warm air furnace does not have a revertible flue? - CORRECT ANSWERS
Center line of the flue collar is 12" above burner port and barometric draft regulator can be installed so
relief opening is 12" above the highest flue passage.
, Can you convert a forced air furnace with a secondary heating surface on the suction side of the air
blower? - CORRECT ANSWERS No. Unless the heating surface consists of a single cylinder
flue pope passing directly from the primary heat exchange to the flue collar and has a continuously gas
tight welded joint.
How do you check a heat exchanger? - CORRECT ANSWERS 1. Smoke in fire chamber (plug
the flue outlet)
2. Light and mirror, check for cracks
3. warping and distortion of heat exchanger
4. Rust Spots
5. Gaskets on joints.
How do you determine the firing rate of a replacement burner? - CORRECT ANSWERS 1.
Heat loss calculations of the building
2. Input or output on rating plate
3. Nozzle size in the burner
How do you calculate nozzle size in an oil burner? - CORRECT ANSWERS Gallons per hour
time 1 US galon of oil (140 000 btu)
ie: 0.75 h x 140 000 btu = 105 000 btu/h
How many btus is 1 Boiler Horsepower? - CORRECT ANSWERS 33 475 btuh
What are the three types of combustion chamber designs? - CORRECT ANSWERS 1. Updraft
2. Semi-revertible
3. Revertible - conversion prohibited
Questions with 100% Correct Answers |
Verified | Latest Update 2026
What are the factors governing a conversion? - CORRECT ANSWERS Availability of gas,
efficiency if converted, access to combustible air, satisfactory ductwork, can a chimney liner be installed,
clearances from combustibles, manufactures recommendations, if a water heater is also being installed
(common vent or power vent), and age of the appliance
Oil fired furnaces are recommended not to be converted at a certain age what is age is this? - CORRECT
ANSWERS 10 years clause 4.3.5
What are the responsibilities of the installer when converting? - CORRECT ANSWERS
Determine that it can accept gas and will operate satisfactory for a reasonable length of time.
What must be done when converting a boiler? - CORRECT ANSWERS 1. Check for revirtible
flue; center line must be at leas 12" above burner port
2. Visually inspect for leaks
3. Open drain at bottom and flush until water is clear
4. Sediment can hide a leak at the bottom
Where must a pressure relief drop tube be located on a boiler? - CORRECT ANSWERS The
pressure relief tube must be withing 12" of the floor
What must be done if a warm air furnace does not have a revertible flue? - CORRECT ANSWERS
Center line of the flue collar is 12" above burner port and barometric draft regulator can be installed so
relief opening is 12" above the highest flue passage.
, Can you convert a forced air furnace with a secondary heating surface on the suction side of the air
blower? - CORRECT ANSWERS No. Unless the heating surface consists of a single cylinder
flue pope passing directly from the primary heat exchange to the flue collar and has a continuously gas
tight welded joint.
How do you check a heat exchanger? - CORRECT ANSWERS 1. Smoke in fire chamber (plug
the flue outlet)
2. Light and mirror, check for cracks
3. warping and distortion of heat exchanger
4. Rust Spots
5. Gaskets on joints.
How do you determine the firing rate of a replacement burner? - CORRECT ANSWERS 1.
Heat loss calculations of the building
2. Input or output on rating plate
3. Nozzle size in the burner
How do you calculate nozzle size in an oil burner? - CORRECT ANSWERS Gallons per hour
time 1 US galon of oil (140 000 btu)
ie: 0.75 h x 140 000 btu = 105 000 btu/h
How many btus is 1 Boiler Horsepower? - CORRECT ANSWERS 33 475 btuh
What are the three types of combustion chamber designs? - CORRECT ANSWERS 1. Updraft
2. Semi-revertible
3. Revertible - conversion prohibited
