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BC Owner Builder Exam
Order of inspections - Answer-1: forms, basement and crawlspace 2: Plumbing, dampproofing, foundation drainage , sanitary sewer, storm sewer, sump, water service 3: plumbing, electrical, mechanical, gas 4: framing inspection 5: insulation and vapour barrier 6: rainscreen/exterior finishs, drywall 7: building envelop inspection 8: final inspection Which is not an acceptable method for determining the correct grading for a trench? - Answer-An experienced excavator says it's ok At what depth is shoring required? - Answer-1.2m/4ft Which best describes the principle of rain waterterm-0 deflection? - Answer-Design and construction that prevents water from ever entering What lighting safety certifications are required in Canada? - Answer-CSA safety certification What grit of sandpaper would get the smoothest result? - Answer-Higher grit with get a smoother finish
What is the maximum rise in a flight of stairs? - Answer-The vertical height of any flight of stairs should not exceed 3.7m What is the minimum distance that a ladder must extend above a parapet wall or landing? - Answer-3ft What heights are end dams to be on windows and door flashings? - Answer-25mm/1 inch End dam use - Answer-Stop water from coming in When should you call for inspectors to make them efficient as possible? - Answer-Group inspectors together when possible and call when work is complete When is an HRV required? - Answer-Almost always What can you build under the owner-builder HPO process? - Answer-Single detached home under a single title. Single dwelling attached to pre-existing building older than 10 years. Single dwelling attached to a new non-residential building. Who issues permits for a gas fireplace? - Answer-Safety Authority (call Technical Safe BC) Can an owner builder take out their own electrical permit? - Answer-Yes, up to 200A What is the best way to apply asphalt waterproofing on a foundation? - Answer-Spray-on or roll on dry foundation with 2in. below grade When is the appropriate time to backfill a foundation? - Answer-After damp-proofing
When should there be insulation under a basement slab? - Answer-When there is in floor heating How deep should the control joint be in a concrete slab? - Answer-1/4 of the slab What kind of insulation should be installed under slab? - Answer-XPS What kind of insulation has the least moisture permeability? - Answer-XPS When framing a header of a staircase where does the framer get the nailing pattern? - Answer-Use the BC code section 9 nailing pattern What document must the owner submit to WorkSafe BC prior to starting construction? - Answer-Notice of project What is the nailing/screw pattern for backer board? - Answer-Manufacturer approved pattern When installing a bi-fold door the door bings at the side jamb on the top. What can be done to fix this? - Answer-Adjust the top pivot point What should be done when joist and beams have contact with bare concrete walls? - Answer-Use pressure treated wood and leave 12mm air space What is the minimum depth for a beam support? - Answer-Not less than 89mm When is a footing required? - Answer-Under walls, pilasters, columns, piers, fireplaces and chimneys that bear on soil or rock
When is a footing inspection conducted? - Answer-When the forms and steel reinforcing are complete, but prior to placing any concrete What is the moisture permeability of 6mm poly? - Answer-0.03 US perm or 1.7 ng When can WorkSafe BC come to your construction site? - Answer-Anytime What is the maximum moisture percentage you can have in framing lumber? - Answer-19% What is your liability for you subcontractor on your site? - Answer-You must abide by the Workers Compensation Act and obtain a clearance letter from each contractor to ensure they are in good standing with WorkSafe BC Where is diverting flashing used? - Answer-At the end of an intersection between a roof and a wall to direct water away from the vertical wall What is the best way to build a water tight wall? - Answer-With the use of a rain screen When can you sell an owner built home? - Answer-After the first year of occupancy, or with special permission from the HPO Can you transfer your owner built home to a family member in the first year? - Answer-No If you are building a room 12' by 9' and you draw a diagonal line between 2 corners how long would the line be? - Answer-15' How far above the chimney can the flue liner protrude? - Answer-A minimum of 50mm
What square is best to use to transfer and 35 degree slope from plans to work? - Answer-A sliding T- bevel How much support is needed for floor joists into footing? - Answer-1.5" min for floor joists. For beams 3.5" Why must concrete cure? - Answer-To reach peak strength What is one method that can be used to prevent new concrete from freezing in cold weather? - Answer- Insulated tarps When should you order and inspection for an external sewer line? - Answer-When the pipe in on 6" of sand and before backfill When should insulation be inspected? - Answer-After insulation is installed but before covering When can you put up exterior house wrap? - Answer-After framing inspection but before insulating What must a gas fitter do when a gas system installation has been completed? - Answer-Affix a tag with their name, certificate number, type of appliance and date How far away must an electrical meter be from a gas meter? - Answer-1m When locking out of a circuit what must you do? - Answer-Shut off, tag and lock For beam construction, what to do for nailing patters - Answer-Refer to manufacturers or engineer's instructions
Who is responsible to ensure that the electrical contractor is performing work safely on the site? - Answer-Owner builder When NOT to install vapour barrier - Answer-If insulation wet How to measure wood moisture - Answer-Moisture meter Which of the following is not a characteristic of house wrap? - Answer-Is vapour proof Min gap for rain screen - Answer-10mm When strapping vertical siding? - Answer-Put vertical straps on wall with horizontal on second What is best practice eaves trough hanger spacing? - Answer-3 feet/36 inches Why is the dam used on window flashing? - Answer-To hinder water flow behind siding etc. What to do if window top is 16" down from a 24" overhang? - Answer-Install header flashing Worst underlayment for bathroom tile floor? - Answer-1/4" particle board Best type of flashing to use? - Answer-Will last the lifetime of the surrounding materials Hood fans for ranges should be based on? - Answer-The air exhaust volume, intake air volume needed, and clearance restrictions
Basically, mixing and matching physical qualities of barrier materials. Something like this. Which state is note true? - Answer-b. Barrier materials only provide one function each, air, moisture or vapour Which product is used before applying latex paint to new drywall? - Answer-Water based primer sealer Some high efficiency windows have a gas injected between the panes. What is the gas? - Answer-Argon Storage of materials that are hazardous, are combustible, corrosive, toxic etc. should be safely stored. Where can they be stored - Answer-In their approved containers inside a locked room What is used to prevent mitre joints from opening? - Answer-Biscuits and silicone What is the best way to make an expansion joint without plastic strip or tooling? - Answer-Sawing Where a roof structure requires ventilation, where can a vent for air flow NOT be placed? - Answer- Fascia The owner-builder's brother in law is a licensed builder. What are the restrictions regarding his involvement? - Answer-Can't be general contractor What barrier must be placed between concrete form and base plate? - Answer-Sill gasket What is the primary reason to use a pre-manufactured cap shingle? - Answer-Better wind resistance When roof trusses turn up, how do you know what order they go? - Answer-Chart/pictogram is delivered with them which shows where they go (and they are also individually labelled)
Most heat loss is thru - Answer-Windows Having a big range hood, might cause problems with pressurization, heating...? - Answer- Depressurization (negative pressure) Best kind of paint for kitchen - Answer-Water based What would you do if your plumbing inspection failed? - Answer-Stop work, fix mistakes, call inspection again What documents are required from WCB when hiring a sub-contractor? - Answer-Clearance letters How do you dry concrete if there is a sudden drop in temperature? Or to help concrete cure - Answer- Cover with tarp What are the requirements for a hand rail? - Answer-Must be continuous on one side and ended in a way that won't impede usage What is the required headroom over stairs? - Answer-6.4' When using spray foam insulation as a vapour barrier - Answer-It must be thick enough to meet vapour barrier requirements 1 in - Answer-25.4 mm 1 ft - Answer-0.3048 m
What is the best practice for framing a foundation? - Answer-Square corners first and brace How should you store propane cylinders on a job site? - Answer-Upright and secured What is the most appropriate bridging / blocking for a non-engineered floor? - Answer-Cross-bridging at 7' OC max How do you properly install rigid insulation in a cavity wall? - Answer-Directly against the concrete When are sprinklers required in a SFD? - Answer-Only required if local bylaws require them Minimum horizontal overlap for building paper? - Answer-100mm or 4" How do you square up a wall when framing? - Answer-Measure diagonals Which two materials most affect the strength of concrete? - Answer-Cement and water When do you call for a framing inspection? - Answer-When the framing is complete, and HVAC and plumbing are roughed in When can you apply for an occupancy permit? - Answer-Upon substantial completion If you omit the edge covering for a concrete tile roof, what will happen? - Answer-Edge of tiles no longer protected against corrosion Which of the following best describes the third law of thermodynamics? - Answer-Heat flows from an area of high heat to low heat
For differential grades, what is the minimum run for step footings? - Answer-2ft When you build footing on sloped land, what do you use? - Answer-Step footing Nail pattern for vertical and horizontal application of panel-type sheathing? - Answer-6" on edge; 12" elsewhere What is the maximum perm rating allowed for an exterior wall assembly? - Answer-60ng (1.05) Where do you vent Radon gas? - Answer-Wall or roof The assessment value of your home goes up by 150% in the first year what do you do? - Answer-Call BC assessment How many days to file a lien - Answer-45 days How do you make sure the house is square? - Answer-By 3 4 5, measure and use pythagoras Why is ICF or insulated concrete form used? - Answer-Better R-value Best way to make a duct energy efficient - Answer-Tape Joints and insulate Why shouldn't both concrete and wood be used together when framing? - Answer-They expand and contract differently What is true of metal roofing material? - Answer-Lasts 40 years
What is the best way to attached drywall with screws? - Answer-Screws should be slightly imbedded in drywall without tearing paper When is the best to back fill? - Answer-Back-fill after inspections and after floor is installed to stabilize foundation R value is the capacity of a material to resist what kind of flow? - Answer-Heat What happens if end-closures are not installed on a concrete tile roof? - Answer-Snow and water can/will easily enter roof space and damage is likely to occur Where is safety glass required by code - Answer-sliding glass doors Question about which regulation most relevant to the safety of gas equipment installation? - Answer- Safety Standards Act Max HPA penalty - Answer-$25 000 Which of the following statements about direct vent gas fireplaces is false? - Answer-Gas fireplaces have an adjustable air damper What type of drywall is needed as a fire barrier between a garage and the floor above? - Answer-5/ drywall Joining EPS sheets - Answer-With compatible glue or approved tape What are the minimum strengths (in Mpa) for concrete - Answer-Footings, walls, foundations 15 Mpa
Interior Flatwork 20 Mpa Garages, carports, exterior32 Mpa What is the maximum allowable rise in millimeters for a stair in a dwelling unit? - Answer-200mm At what depth of excavation is a ladder required to be provided? - Answer-4ft What kind of window has life attachment/hinge - Answer-Casement Most energy efficient movable window - Answer-Hinged The performance of a specific task in a bar chart is referred to as - Answer-Schedule Under the builder's act what percentage of money can an owner hold back? - Answer-10% When does the statutory protection provision not apply to an owner-built home? - Answer-When there is a policy of home warranty in place for owner-built home How much do asphalt shingles need to overlap the flashing for a roof valley - Answer-6" Horizontal security blocking required on side(s) of framed doors? - Answer-2 studs When to call for insulation inspection - Answer-Before boarding
