G2 Gas Technician Module 13 Revised
Exam 2026 Questions and Answers
If inadequate combustion air is in a tightly sealed house what happens? - Correct
answer-Potenially leads to severe indoor air quality problems
When changing a part of the heating system what 4 factors must the gas technician
take into account? - Correct answer-The building envelope, external environment,
mechanical systems, and occupants
What comprises the building envelope? - Correct answer-Foundation and floor
slabs, walls, roofs, and windows and doors
What does the skin in the building envelope do? - Correct answer-Protects the
underlying material, maintains building integrity and reduces heat loss and heat
gain
What is the function of the vapour barrier? - Correct answer-It is used to maintain
proper humidity levels inside the house. In winter if not present the relative
humidity will decrease causing it to feel colder then it is.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, What does insulation do? - Correct answer-It is a poor conductor of heat and will
prevent the ex filtration indoor heat to the outside.
Name 2 signs of poor attic ventilation. - Correct answer-Curling shingles in
summer and icicle dams in the winter
What is the function of the air barrier and where is it located? - Correct answer-The
air barrier is located between the bricks and wood studs. It allows moisture to be
removed through venting.
What are three types of building construcion? - Correct answer-Balloon frame,
Double/solid brick, platform (most common)
How do occupants affect the building system? What are some actions that do this?
- Correct answer-As the more occupants increase the relative humidity will also
increase. Cooking, bathing, smoking and plain old breathing.
Mechanical impact consist of equipment and appliances within the building. Name
a few. What should the gas tech consider? - Correct answer-Water heaters, dryers,
motors, fireplaces, wood stoves and air cleaners. They may require more
combustion and ventilation air for air exhausted and used in combustion.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
Exam 2026 Questions and Answers
If inadequate combustion air is in a tightly sealed house what happens? - Correct
answer-Potenially leads to severe indoor air quality problems
When changing a part of the heating system what 4 factors must the gas technician
take into account? - Correct answer-The building envelope, external environment,
mechanical systems, and occupants
What comprises the building envelope? - Correct answer-Foundation and floor
slabs, walls, roofs, and windows and doors
What does the skin in the building envelope do? - Correct answer-Protects the
underlying material, maintains building integrity and reduces heat loss and heat
gain
What is the function of the vapour barrier? - Correct answer-It is used to maintain
proper humidity levels inside the house. In winter if not present the relative
humidity will decrease causing it to feel colder then it is.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, What does insulation do? - Correct answer-It is a poor conductor of heat and will
prevent the ex filtration indoor heat to the outside.
Name 2 signs of poor attic ventilation. - Correct answer-Curling shingles in
summer and icicle dams in the winter
What is the function of the air barrier and where is it located? - Correct answer-The
air barrier is located between the bricks and wood studs. It allows moisture to be
removed through venting.
What are three types of building construcion? - Correct answer-Balloon frame,
Double/solid brick, platform (most common)
How do occupants affect the building system? What are some actions that do this?
- Correct answer-As the more occupants increase the relative humidity will also
increase. Cooking, bathing, smoking and plain old breathing.
Mechanical impact consist of equipment and appliances within the building. Name
a few. What should the gas tech consider? - Correct answer-Water heaters, dryers,
motors, fireplaces, wood stoves and air cleaners. They may require more
combustion and ventilation air for air exhausted and used in combustion.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
