Alberta Gasfitter Class D Certification Exam
(Specialty) Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
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1. The primary scope of work for a Gasfitter Class D in Alberta is
limited to
A. All types of natural gas and propane systems
B. Residential and commercial appliances of any input
C. Specialty gas appliances and systems as defined by permit
conditions
D. Industrial gas distribution systems
Class D certification is restricted to specific specialty appliances or
systems approved under permit conditions.
2. Before installing a gas appliance, the installer must verify
A. Appliance color and finish
B. Nameplate ratings and approval markings
C. Retail purchase receipt
D. Manufacturer warranty length
Nameplate data ensures the appliance is approved and suitable
for the gas type and input.
3. Which gas is lighter than air?
A. Propane
B. Natural gas
C. Butane
, D. Carbon dioxide
Natural gas rises when released, while propane is heavier than air.
4. Propane vapour density compared to air is
A. Lighter than air
B. Equal to air
C. Heavier than air
D. Variable with temperature
Propane settles in low areas due to its higher vapour density.
5. The primary purpose of a regulator is to
A. Measure gas flow
B. Odorize gas
C. Reduce and control gas pressure
D. Shut off gas automatically
Regulators ensure appliances receive gas at safe operating
pressures.
6. A shutoff valve must be installed
A. Only at the meter
B. Only outside the building
C. Upstream of each appliance
D. Only on propane systems
Accessible appliance shutoff valves are required for safety and
servicing.
7. The standard test medium for pressure testing gas piping is
A. Natural gas
B. Propane
C. Oxygen
, D. Air or inert gas
Combustible gases must never be used for pressure testing.
8. When pressure testing, appliances should be
A. Included in the test
B. Turned on
C. Isolated or disconnected
D. Ignited
Appliances can be damaged by test pressures above normal
operating levels.
9. A soap solution used during leak testing is applied to
A. Appliance burners
B. Vent terminals
C. Joints and fittings
D. Heat exchangers
Bubbles indicate escaping gas at joints or connections.
10. Carbon monoxide is best described as
A. A flammable gas with odor
B. A visible combustion by-product
C. A colorless, odorless, toxic gas
D. A corrosive vapor
CO is dangerous because it cannot be detected by human senses.
11. Incomplete combustion most commonly results from
A. Excess air
B. Insufficient air
C. High gas pressure
D. Clean burners
Lack of oxygen prevents complete fuel combustion.
(Specialty) Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. The primary scope of work for a Gasfitter Class D in Alberta is
limited to
A. All types of natural gas and propane systems
B. Residential and commercial appliances of any input
C. Specialty gas appliances and systems as defined by permit
conditions
D. Industrial gas distribution systems
Class D certification is restricted to specific specialty appliances or
systems approved under permit conditions.
2. Before installing a gas appliance, the installer must verify
A. Appliance color and finish
B. Nameplate ratings and approval markings
C. Retail purchase receipt
D. Manufacturer warranty length
Nameplate data ensures the appliance is approved and suitable
for the gas type and input.
3. Which gas is lighter than air?
A. Propane
B. Natural gas
C. Butane
, D. Carbon dioxide
Natural gas rises when released, while propane is heavier than air.
4. Propane vapour density compared to air is
A. Lighter than air
B. Equal to air
C. Heavier than air
D. Variable with temperature
Propane settles in low areas due to its higher vapour density.
5. The primary purpose of a regulator is to
A. Measure gas flow
B. Odorize gas
C. Reduce and control gas pressure
D. Shut off gas automatically
Regulators ensure appliances receive gas at safe operating
pressures.
6. A shutoff valve must be installed
A. Only at the meter
B. Only outside the building
C. Upstream of each appliance
D. Only on propane systems
Accessible appliance shutoff valves are required for safety and
servicing.
7. The standard test medium for pressure testing gas piping is
A. Natural gas
B. Propane
C. Oxygen
, D. Air or inert gas
Combustible gases must never be used for pressure testing.
8. When pressure testing, appliances should be
A. Included in the test
B. Turned on
C. Isolated or disconnected
D. Ignited
Appliances can be damaged by test pressures above normal
operating levels.
9. A soap solution used during leak testing is applied to
A. Appliance burners
B. Vent terminals
C. Joints and fittings
D. Heat exchangers
Bubbles indicate escaping gas at joints or connections.
10. Carbon monoxide is best described as
A. A flammable gas with odor
B. A visible combustion by-product
C. A colorless, odorless, toxic gas
D. A corrosive vapor
CO is dangerous because it cannot be detected by human senses.
11. Incomplete combustion most commonly results from
A. Excess air
B. Insufficient air
C. High gas pressure
D. Clean burners
Lack of oxygen prevents complete fuel combustion.
