BC Owner Builder Exam Study
Companion and Practice Questions 2025
How far above the chimney can the flue liner protrude?
• Flush with the top of the chimney
• 25 mm minimum
• 50 mm minimum
• 75 mm minimum
Rationale: The flue liner must extend at least 50 mm above the top of the chimney to
ensure proper draft and prevent gas leakage. Anything less can cause backflow or poor
ventilation.
What is the correct chimney clearance requirement?
• 2 feet above the highest point within 10 feet
• 3 feet above the ridge
• 1 foot above roofline
• 18 inches above any structure
Rationale: Building codes require a chimney to extend 2 feet higher than any point within
a 10-foot radius to ensure safe dispersion of smoke and prevent downdrafts.
What are the ventilation fan requirements for a dwelling?
• One fan per dwelling
• One exhaust fan in each kitchen and bathroom, plus a principal exhaust fan for
the whole home
• Only in bathrooms
• Only one fan for all rooms
,Rationale: Proper ventilation prevents moisture buildup. Each kitchen and bathroom
must have exhaust fans, and an additional principal fan should ventilate the entire home.
Where should a water heater be located?
• In an unheated garage
• Close to the main area of hot water use and away from freezing pipes
• In an attic space
• Anywhere convenient
Rationale: Placing a water heater near major usage points reduces heat loss and energy
waste, while avoiding cold areas prevents freezing and pipe damage.
What is the insulation requirement between the main home and the garage?
• None if the garage is heated
• Treat the garage wall as an exterior wall with full insulation, air, and vapor
barrier
• Partial insulation only
• Use soundproofing material
Rationale: The wall between a garage and living space must be insulated as though it
faces the exterior to prevent heat loss and fume intrusion.
When should you call for electrical inspections?
• After walls are finished
• Before wiring is concealed or connected to power
• After flooring installation
• Once all outlets are operational
Rationale: Inspections must be done before wires are hidden or energized to ensure
safety and compliance with code.
, What must be done if you fail an electrical inspection?
• Appeal the decision
• Fix the problem and request re-inspection
• Leave as is
• Replace all wiring
Rationale: The proper procedure after failure is to correct deficiencies and schedule a re-
inspection to confirm compliance.
When is a chimney saddle required?
• When chimney width is 500 mm
• When the upper-side width is 750 mm or more
• Only on flat roofs
• When chimney is under 10 feet tall
Rationale: A chimney saddle (cricket) is required when the upper-side width is 750 mm
or greater, to divert water and prevent leaks.
Before starting any building project, what must be done?
• Obtain plumbing permit
• Notify WorkSafeBC at least 24 hours in advance
• File completion report
• Apply for warranty
Rationale: WorkSafeBC must be notified 24 hours prior to any construction start for
worker safety and regulatory compliance.
How high must a ladder protrude above a 4' trench?
• 1 foot
Companion and Practice Questions 2025
How far above the chimney can the flue liner protrude?
• Flush with the top of the chimney
• 25 mm minimum
• 50 mm minimum
• 75 mm minimum
Rationale: The flue liner must extend at least 50 mm above the top of the chimney to
ensure proper draft and prevent gas leakage. Anything less can cause backflow or poor
ventilation.
What is the correct chimney clearance requirement?
• 2 feet above the highest point within 10 feet
• 3 feet above the ridge
• 1 foot above roofline
• 18 inches above any structure
Rationale: Building codes require a chimney to extend 2 feet higher than any point within
a 10-foot radius to ensure safe dispersion of smoke and prevent downdrafts.
What are the ventilation fan requirements for a dwelling?
• One fan per dwelling
• One exhaust fan in each kitchen and bathroom, plus a principal exhaust fan for
the whole home
• Only in bathrooms
• Only one fan for all rooms
,Rationale: Proper ventilation prevents moisture buildup. Each kitchen and bathroom
must have exhaust fans, and an additional principal fan should ventilate the entire home.
Where should a water heater be located?
• In an unheated garage
• Close to the main area of hot water use and away from freezing pipes
• In an attic space
• Anywhere convenient
Rationale: Placing a water heater near major usage points reduces heat loss and energy
waste, while avoiding cold areas prevents freezing and pipe damage.
What is the insulation requirement between the main home and the garage?
• None if the garage is heated
• Treat the garage wall as an exterior wall with full insulation, air, and vapor
barrier
• Partial insulation only
• Use soundproofing material
Rationale: The wall between a garage and living space must be insulated as though it
faces the exterior to prevent heat loss and fume intrusion.
When should you call for electrical inspections?
• After walls are finished
• Before wiring is concealed or connected to power
• After flooring installation
• Once all outlets are operational
Rationale: Inspections must be done before wires are hidden or energized to ensure
safety and compliance with code.
, What must be done if you fail an electrical inspection?
• Appeal the decision
• Fix the problem and request re-inspection
• Leave as is
• Replace all wiring
Rationale: The proper procedure after failure is to correct deficiencies and schedule a re-
inspection to confirm compliance.
When is a chimney saddle required?
• When chimney width is 500 mm
• When the upper-side width is 750 mm or more
• Only on flat roofs
• When chimney is under 10 feet tall
Rationale: A chimney saddle (cricket) is required when the upper-side width is 750 mm
or greater, to divert water and prevent leaks.
Before starting any building project, what must be done?
• Obtain plumbing permit
• Notify WorkSafeBC at least 24 hours in advance
• File completion report
• Apply for warranty
Rationale: WorkSafeBC must be notified 24 hours prior to any construction start for
worker safety and regulatory compliance.
How high must a ladder protrude above a 4' trench?
• 1 foot
