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Home Owner General Contracting Exam
B.C
At what depth of trench is shoring require / At what depth of an excavation is shoring required? - Answer-1.2 Meters or 4 feet Which of the following is not an acceptable method for determining the correct grading for a trench? - Answer-An experienced excavator says it's ok Which best describes the design principle of rain water deflection? - Answer-Design and construction that prevents water from ever entering What lighting certifications are required in Canada? - Answer-CSA safety certification What grit of sandpaper would get smoothest result? (150 / 180/etc.) - Answer-The higher the grit, the finer/smoother the finish. When finishing a surface, you typically start with a low grit and work up to a high grit What is the maximum rise in a flight of stairs? - Answer-3.7 meters or 12.14 feet What is the minimum distance that a ladder must extend above a parapet wall or landing? - Answer- feet
If you have a 4m ladder, how far from the wall does the base of the ladder have to be? - Answer- degrees = 1 horizontal to 4 vertical so 1m. 4:1 ratio What heights are end dams to be on window and door flashings? - Answer-25 mm / 1 inch (from BCBC) When to call for inspections and how to make them efficient as possible? - Answer-Group together when possible and call when work is complete When is an HRV required? - Answer-Almost always: "Effective December 19, 2014 residential dwelling units, such as houses, apartments and secondary suites will be required to have a principal ventilation system that exhausts air from bathrooms and kitchens and supplies fresh air to bedrooms and living areas [9.32.3.3.]" "Some small dwelling units in mild climates are permitted to supply fresh air through passive vents [9.32.3.4.(6)], but for most dwelling units exhaust and supply will require a mechanical fan What can you build under the owner-builder HPO process - Answer-Single detached home under a single title. One single dwelling unit in or attached to a pre-existing building older than 10 years (includes the addition of a unit to convert a detached home to a duplex, or conversion of a duplex to triplex, or conversion of non-residential space to a dwelling unit). One single dwelling unit in or attached to a new non-residential building (one only per building, such as a caretaker suite or home built above a family-run store). Who issues permits for a gas fireplace? - Answer-Safety Authority → now call Technical Safety BC Which of the following is not allowed under the HPO owner-builder program? - Answer-New dwelling unit attached to building newer than 10 years old Can an owner builder take out his or her own electrical permit? - Answer-Yes - work up to 200A is allowed.
What regulation outlines the order for fall protection? - Answer-Occupational Health & Safety Regulation Part 11: Fall Protection How high does a construction fence around a site needs to be - Answer-6 feet When installing the footer, it was dug down 2 inches deeper then what the elevation should be. What needs to happen? - Answer-a. Install the footing form at proper elevation and fill with extra concrete b. Install the footing form at proper elevation and fill with 2inch of dirt then with concert (no extra) c. Dig down 10 more inches and fill with extra concert, to increase size of footer so it can with stand the extra weight d. Install footer at lower elevation and fill with concert no extra Answer is A When installing flashing for a roof valley how much do the asphalt shingles need to overlap it - Answer- inches What would cause a Blister on a flat roof? - Answer-Moisture trapped under roof What would cause a blister on a gravel or ballast roof? - Answer-Moisture trapped under roof Water is backing up in a skylight what do you do to fix it? - Answer-a. Remove caulking from skylight b. Drill drain holes c. Clear drainage d. Other Answer: C
What needs to be done first when starting to install asphalt shingles on a roof? - Answer-a. Law one row of shingles b. Install roof vents c. Install roof edge d. Install eve protection Answer D What kind of fastener can you use in a wood that had been treated with chromated copper arsenate (pressure treated wood)? - Answer-a. Lumber manufacturer approved fastener b. Stainless steel only c. Hot dipped Galvanized only d. Ceramic coated only Answer:A When should there be insulation under a basement slab? - Answer-a. When there is in floor heating or above frost line b. No insulation is needed Answer A How deep should the control joint be in a concrete slab? - Answer-a. 1/4 of the slab b. 1/2 of the slab c. 3/8 of the slab d. 7/8 of the slab Answer: A What can be done to eliminate differential shrinkage? - Answer-A: Control Joints
What document must the owner submit to WorkSafe BC prior to starting construction? - Answer-a. Proof of insurance coverage b. Copy of building permit c. Notice of project d. Safety plan Answer C What is the nailing/screw pattern for backer board? - Answer-a. Every 6 inch b. Every 12 inch c. Every 8 inch d. Manufacturer approved pattern Answer D Maybe A 6inches. Underlay When installing a bi-fold door, the door binds at the side jamb on the top what can be done? - Answer-a. Shim the door frame b. Adjust the bottom pivot point c. Adjust the top pivot point d. Remove bi-fold door/frame and reinstall Answer C What should be done when joist and beams have contact with bare concrete wall? - Answer-a. Use galvanized joist hanger and beam pocket b. Use pressure treated wood OR leave 12 mm air space c. Nail joist to concert wall d. Other Answer b
What is the minimum depth for a beam support? (beam pocket in foundation wall) - Answer-Not less than 89mm, 3-inch
. When is a footing needed? - Answer-Footings shall be provided under walls, columns, pilasters, piers, fireplaces and chimneys that bear on soil or rock, except that footings may be omitted under piers or monolithic concrete walls if the loadbearing capacity of the soil or rock is not exceeded. When is a footing inspection conducted? - Answer-a. When the forms and steel reinforcing, if used, for the footings are complete but prior to placing any concrete b. Prior to placement of reinforcing steel c. After the concrete has been poured and set d. While concrete is curing Answer A When fitting a casement window, the window will not close all the way what do you do? - Answer- Ensure casement is plump and square Sash hinged windows are called what? - Answer-Casement . What is the moisture permeability of 6mil poly? - Answer-0.03 US perm (1.7 SI perm) or 1.7 ng New fireplaces come with an airbox around the firebox what is it for? - Answer-I think they are referring to the air heating chamber, where cold air is drawn in near the bottom (interior) of the fireplace, circulates around the firebox, and then are vented out the top. Sometimes there is a blower installed to control the airflow. This provides more controlled distribution of heat. How would you install flashing around a chimney? - Answer-Head flashing long, side flashing imbedded 1 " into mortar joint or caulked
. If you are building a room 12' by 9' and you draw a diagonal line between 2 corners to see if the room is square how long would the line be? - Answer- x=square of 12^2+9^ How far above the chimney can the flue liner protrude? - Answer-a. 25mm exactly b. Flue liner can project a minimum of 50 mm c. At the discretion of the installer d. Based on weather data Answer b Correct chimney clearance - Answer-2' above the highest point within 10'. Must be at lest 3' tall New bathroom fan code for ventilation? - Answer-Every dwelling unit shall be equipped with: a. a principal ventilation exhaust fan or ducted central ventilation system providing a minimum ventilation b. an exhaust fan with a minimum ventilation rate in:
- every kitchen and
- every bathroom or water-closet room, unless the bathroom or water-closet room is served ventilation exhaust fan or ducted central ventilation system providing a minimum ventilation rate Appropriate location for water heater? - Answer-It is recommended that the water heater be located near the center of greatest hot water usage to prevent heat loss through the pipes and not be installed outdoor. Do not locate the water heater where water lines could be subject to freezing temperatures or in a tiny closet or hard to access spot.
Know code pertaining to insulation between main home and garage. - Answer-Garage is considered unconditioned space even if heated because the garage doors can open. Air barrier and insulation is required between the main living areas though an external wall AND in the ceiling if there is conditioned space above the garage. Fire rated walls and ceiling may be required if there is a secondary suite. Insulate and vapor barrier as if garage were exterior space. When to call for electrical inspections? - Answer-Electrical homeowner permit holders must request a safety officer to inspect electrical work before any wiring is concealed or connected to a supply. The completed electrical work must also pass the final inspection by a safety officer. Homeowners can request an inspection by completing and submitting the Electrical Homeowner Inspection Request form
- Temporary power pole service inspection. A temporary construction site service is required to be inspected before BC Hydro can be given permission to connect and install the meter. An electrical contractor fails an inspection (or a notice is posted). What must the electrician do? - Answer-Fix the issue and call for reinspection When do you need a chimney saddle? - Answer-When upper side width of chimney is 750mm (30") or more. Why do you need a chimney saddle - Answer-To keep off snow What must you do before starting to build? - Answer-File a NOP 24 hours in advance How high must a ladder protrude above a 4' trench? - Answer-3' Why keep a worksite free of debris etc.? - Answer-Protect inspectors and safe efficient workplace What shows hidden object in blueprints? - Answer-Dashed line
b. Affix a tag with their name, certificated number, type of appliance and date c. Sign off gas permit and submit to municipal building department d. File permit documentation with municipality Answer b Where not to put electrical meter? - Answer-Per Fortis BC the electrical meter must be at least 1M away from the gas meter Which statement of a location of a hydro meter is false? - Answer-a. Meter base is more than 1 meter (3ft) from corner of building closest to BC Hydro source or shut off b. Resident meters must be accessible c. Meters must be installed between 1.5 and 1.8 meters above finished grade d. Electrical meters must be installed within 1.8 meters of the gas meter Answer a When locking out of a circuit you must? - Answer-Shut off, tag, and lock For I beam construction what to do for nailing patterns? - 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-a. WorkSafe BC b. Municipal Inspector c. Owner Builder d. BC Safety Authority Answer c
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-a. Allows vapour to escape b. Is vapour proof c. Is the primary water repelling system d. Keeps water out Answer b. What is min gap for rain screen? - Answer-10 mm When strapping vertical siding? - Answer-Put vertical straps on wall with horizontal on second What is best practice eaves trough hanger spacing? (gutters) - Answer-36" (3 ft.) 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 Note: Per BCBC, see below [¼ of 24" is 6" so head flashing is required]: Worst underlayment for bathroom tile floor? - Answer-a. Self-leveling cement b. 1/2" OSB c. 1/2" engineered wood d. 1/4" particleboard
HRV questions about distance between external in and out vents? - Answer-6" apart and 18" off the ground Window CSA coding does not designate? - Answer-a. Wind resistance b. Moisture resistance c. Energy rating d. Type Answer d When and why to use a saddle above a chimney? - Answer-Use a saddle when your chimney is protruding from a sloped roof and greater than 750mm in width. Use it to divert water away from the top edge of the chimney (prevent water damage). Can owner builder pull a permit for plumbing? - Answer-a. If work is done under supervision b. Not possible c. Rough if work only d. Yes; owner builders can pull a plumbing permit provided they do not possess a tradesman qualification certification as a plumber. Answer d Very wordy question about exterior and interior barriers (wraps and vapour barrier) with complex choices like permeable waterproof water resistant impermeable in various combinations. - Answer- Exterior wraps are typically called 'WRB' or weather/water resistant barrier. They are water resistant to bulk water (rain) but will allow moisture to diffuse through (so water in the wall can escape to the exterior). Vapour barriers, which go on the warm side of the wall, should have a low permeability (1.7 SI perms). A typical VB is poly. *Note that a house wrap / WRB is not vapour proof. Which product is used before applying latex paint to new drywall? - Answer-a. Water based primer sealer
b. Water based eggshell paint c. Oil based primer d. Water based semi-gloss paint Answer a Some high efficiency windows have a gas injected between the panes. What is the gas? - Answer-a. Nitrogen b. Hydrogen c. Oxygen d. Argon Answer d Storage of materials that are hazardous, are combustible, corrosive, toxic etc. should be safely stored. Where can they be stored? - Answer-a. In their approved containers inside a locked room b. In their approved containers secured in an outside area c. Inside an isolated room in an off-site building d. Inside the tool crib Answer a What is used to prevent mitre joints from opening? - Answer-a. Biscuits and silicone b. Air dried lumber and sufficient glue c. Air dried lumber and biscuits d. Kiln dried lumber or engineered material and sufficient glue Answer a Where a roof structure requires ventilation, where can a vent for air flow NOT be placed? - Answer-a. Gable
d. Windows Answer A Having a big range hood, might cause problems with pressurization, heating...? - Answer- Depressurization Specifically, to a 600cfm range hood? [answer: negative pressure]
. Best kind of paint for your kitchen? - Answer-a. Oil based b. Water based Answer b What would you do if your plumbing inspection failed? - Answer-a. Stop work fix mistakes and call inspection again b. Continue working and forget inspection c. Continue working and call inspector at the end Answer a 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? - Answer-Cover with tarp What you can do after pouring 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-1950mm = 6.4' single home
2050mm= 6'8" multi home When using spray foam insulation as a vapour barrier - Answer-It must be thick enough to meet vapour barrier requirements Know how to do conversions of mm → inches - Answer-1"=25.4mm Know how to convert feet → meters - Answer-1'=0.3048m Know how to convert mm → meters - Answer-1000mm to M Why is clay tile roof not a good option for the west coast? - Answer-Heavy in earthquake not a good idea When balcony membrane is used, what is the minimum slope percentage? - Answer-2% By properly spacing decking, some allowance for wood movement, drainage, and drying is provided. What is the minimum spacing of deck boards? - Answer-1/8" Most efficient insulation for framed walls? - Answer-Batt insulation How many jobs can a sole sub-contractor do before they must be licensed builder and provide home warranty insurance? - Answer-Maximum 2 jobs What is the "live load" capacity on a floor? - Answer-2.4 kPa Balconies, decks, and other platforms must be designed to carry? - Answer-1.9 kPa; Attic load is 0.35 kPa
