CSLB C-13 Fencing (Trade Exam) — All Questions
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269 questions
What is the maximum knot size the Caltrans specification allows on any face of an untreated post?
- a.2 inches✓
- b.4 inches
- c.1/2 inch
- d.No knots larger than 1 inch
Post knots must be sound, tight, well spaced and not over 2 inches on any face. Four inches is a cross-section dimension, and half an inch and 1 inch are stricter limits than the specification sets.Caltrans 2024 Standard Specifications 80-2.02C(2)
A customer wants to sell a stack of old treated posts as firewood. What does the air district notice say?
- a.It may be sold as firewood if it is labeled for fire pits
- b.Chemically treated wood waste may not be sold or offered as firewood✓
- c.It may be sold as firewood if the buyer will use a fireplace
- d.It may be sold as firewood if the posts are dried first
The notice says not to sell or offer chemically treated wood waste for use as firewood, and that it may not be burned. Drying, a fireplace or a fire-pit label does not remove the preservative.San Joaquin Valley APCD, Chemically Treated Wood Waste Disposal (AB 332)
How does the aluminum-fence instruction say to keep layout accurate when digging post holes?
- a.Dig all holes at one depth with no check
- b.Dig only 4 or 5 holes at a time✓
- c.Dig the gate holes first and the rest later
- d.Dig the full run of holes before setting any post
The instruction says to dig only 4 to 5 holes at a time and set posts and panels as you go. Digging all holes first loses the layout when holes shift, and digging only gates or ignoring checks is not the method.Aluminum fence maker installation instructions, Step 3
What is the minimum diameter of a post hole for an aluminum fence in that instruction?
- a.3 inches
- b.6 inches✓
- c.12 inches
- d.24 inches
The instruction digs post holes with a minimum 6-inch diameter, below the local frost line. Three inches is too small for a post and concrete, and 12 and 24 inches are not the stated minimum.Aluminum fence maker installation instructions, Step 2
About how much concrete does each aluminum-fence hole require, per that instruction?
- a.About 200 to 300 pounds
- b.About 5 to 10 pounds
- c.About 100 to 120 pounds
- d.About 40 to 60 pounds✓
The instruction says each hole will require approximately 40 to 60 pounds of concrete. Five to ten pounds is far too little, and the larger ranges would suit a vinyl gate post.Aluminum fence maker installation instructions, Step 2
How is an aluminum panel cut to fit a wall mount?
- a.Notch each rail 1/2 inch deep at the wall end
- b.Use the standard panel and trim 1 inch from the wall side
- c.Measure to the outside of the mount and subtract 3/4 inch
- d.Measure to the inside of the mount, add 3/4 inch; no notching✓
The instruction measures from the post to the inside of the wall mount, adds 3/4 inch, and says no rail notching is needed in wall mounts. Subtracting, trimming or notching is not the method.Aluminum fence maker installation instructions, Step 5
How much is removed from each rail when notching an aluminum panel cut for an end post?
- a.A 3/4-inch by 1/8-inch section✓
- b.Nothing, rails are cut square
- c.A 1-1/2-inch by 1/2-inch section
- d.A 1/4-inch by 1/4-inch section
The instruction removes a 3/4-inch by 1/8-inch section from all rails, and at corner posts an additional 1/2-inch piece. The other sizes are not stated, and rails are notched, not left square.Aluminum fence maker installation instructions, Step 4
What does ASTM F2408 cover?
- a.Coated tubular picket fence of galvanized steel✓
- b.Solid-bar wrought iron vertical bar fence systems
- c.Wood picket fence systems with steel rails
- d.Vinyl picket fence systems for residential yards
The specification covers coated tubular picket ornamental fence systems fabricated from galvanized steel, and it does not apply to vertical bar systems of solid bar or wrought iron. Vinyl and wood are covered by other documents.ASTM F2408 scope (store abstract)
Which exterior powder coatings does ASTM F2408 describe for ornamental fence components?
- a.Polyester, or epoxy-and-polyester combinations✓
- b.Wax coatings applied to the steel by brush
- c.Zinc dust paint applied by roller
- d.Linseed oil stain applied to bare steel
The scope says powder coatings on the exterior are polymer material: polyester or epoxy-and-polyester combinations. Wax, zinc dust paint alone and linseed oil are not those coatings.ASTM F2408 scope (store abstract)
A 67-inch steel post is installed so that it stands 52 inches above ground. How far is it in the ground?
- a.52 inches
- b.15 inches✓
- c.119 inches
- d.67 inches
67 − 52 = 15 inches in the ground. Fifty-two inches is the part above ground, 67 is the whole post, and 119 adds the two numbers.Composite steel-post maker in-ground post instructions
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In a slat kit with 24-inch slats, what is the post spacing, using the maker's rule of slat width plus 1/2 inch?
- a.24 inches
- b.25 inches
- c.23-1/2 inches
- d.24-1/2 inches✓
The post spacing equals the slat width plus 1/2 inch, so 24.5 inches. Twenty-four inches leaves no room for the slats to slide, 25 inches adds a full inch, and 23-1/2 inches subtracts instead of adds.Composite steel-post maker in-ground post instructions
Why does the steel post maker say to put wood blocks between posts?
- a.To mark where the gate hangs on the finished fence
- b.To keep the concrete from setting before the panels go in
- c.To raise the post above the frost line in the hole
- d.To carry the weight of panels or slats during installation✓
The instruction positions wood blocks between posts to support panel or slat weight during installation. The blocks do not affect concrete setting, frost depth or gate position.Composite steel-post maker in-ground post instructions
Under the 2025 California Building Code, what is the minimum height of required guards in the general rule?
- a.48 inches
- b.60 inches
- c.42 inches✓
- d.36 inches
Required guards are not less than 42 inches high. Thirty-six inches is the lower edge of the 4-3/8-inch sphere band, 48 inches is not the rule, and 60 inches is the pool enclosure height.2025 CBC 1015.3
What size sphere may not pass through guard openings between 36 and 42 inches above the walking surface, under the exception?
- a.A sphere of 4-3/8 inches✓
- b.A sphere of 4 inches
- c.A sphere of 21 inches in diameter
- d.A sphere of 6 inches
From a height of 36 to 42 inches, guards shall not have openings that allow passage of a sphere 4-3/8 inches in diameter. The 4-inch rule applies below that band, 6 inches is the stair triangle, and 21 inches is for equipment access areas.2025 CBC 1015.4
An ornamental fence is built around a single-family-home pool. What clear gap between pickets would let a 4-inch sphere pass and violate Section 115923?
- a.A gap of 3 inches
- b.A gap of 4 inches or more✓
- c.A gap of 3-3/4 inches between the pickets
- d.A gap of 2-1/2 inches
The statute does not allow gaps that let a sphere of 4 inches or larger pass, so a clear gap of 4 inches or more fails. Gaps of 3-3/4, 3 and 2-1/2 inches stop the sphere.Cal. Health & Safety Code 115923(d)
A crew levels an aluminum fence that was dry-packed. When must the leveling be done?
- a.After the first rain
- b.After 2 weeks of curing
- c.It is not done, since dry-packed posts stay as set
- d.The same day✓
The instruction says if you dry-packed your concrete, leveling should be done the same day. A two-week wait, rain or no leveling would leave posts locked in the wrong position.Aluminum fence maker installation instructions, Step 7
Which standard covers vinyl-coated chain link fabric, as opposed to the framework?
- a.ASTM F2408
- b.ASTM F668✓
- c.ASTM F2200
- d.ASTM F1043
ASTM F668 covers polymer-coated chain-link fabric. F1043 is the framework standard, F2408 covers galvanized steel tubular picket ornamental fence, and F2200 covers automated vehicular gates.ASTM F668, F1043, F2408 and F2200 scopes (store abstracts)
The vinyl manufacturer says to tape the ends of a rail in what situation?
- a.When the rail is stored outdoors before installation
- b.When the rail goes into a post to be filled with concrete✓
- c.When the rail is cut in the field to a shorter length
- d.When the rail is painted to match a finished color
The manual says to tape the ends of any rail inserted into a post that is to be filled with concrete, to prevent concrete seepage into the rail. Cutting a rail, storing it outdoors and painting it have nothing to do with seepage, so none calls for taping.Vinyl fence maker installation manual, Install Bottom Rail
How many pieces of rebar does the vinyl manual use in each hinge, latch and end post, and what size?
- a.Two pieces of 3/4-inch rebar
- b.One piece of 1/4-inch rebar
- c.Four pieces of 1-inch rebar
- d.Two pieces of 1/2-inch rebar✓
The manual uses two pieces of 1/2-inch rebar in each hinge, latch and end post, held in opposite corners by separator clips. The other counts and sizes are not given.Vinyl fence maker installation manual, Solidify Gate Posts
How far from the top of the post does the vinyl manual say the rebar should extend?
- a.To the bottom of the hole, not up the post
- b.To about 6 feet below the top of the post
- c.To about 12 inches from the top of the post✓
- d.To the very top of the post, flush with the cap
The rebar extends from the bottom of the hole to approximately 12 inches from the top of the post. Stopping at the bottom of the hole, ending 6 feet below the top, and running flush with the cap are each different from the manual, which stops about 12 inches short of the top.Vinyl fence maker installation manual, Solidify Gate Posts
How much concrete does the manual's table give for a 5 x 5 end post filled with concrete at a 6-foot fence?
- a.240 pounds✓
- b.285 pounds
- c.100 pounds
- d.140 pounds
The table gives 240 pounds for a 5 x 5 end post filled with concrete at 6 feet. One hundred forty pounds is the line post, 285 is the gate post, and 100 is the 4 x 4 line figure.Vinyl fence maker installation manual, Concrete Usage for Posts
What post-center spacing does the manual show for a 4 x 4 traditional picket style with 3-inch pickets?
- a.72 inches✓
- b.60 inches
- c.73 inches
- d.96 inches
For the 4 x 4 post with 3-inch pickets the manual shows 72 inches. Ninety-six inches is another style, 73 inches is the 5 x 5 figure for that style, and 60 inches is not shown.Vinyl fence maker installation manual, Traditional Picket Fence
In the manufacturer's wind table for exposure B, what maximum post spacing goes with a 24-inch footing?
- a.56 inches
- b.97 inches
- c.88 inches
- d.66 inches✓
Exposure B with a 24-inch footing allows 66 inches. Ninety-seven inches is exposure B with a 30-inch footing, 88 is exposure C with 36 inches, and 56 is exposure D with 30 inches.Vinyl fence maker installation manual, Maximum Post Spacing and Footing Dimensions
In the wind table, what happens to the allowed post spacing if the footing is made shallower at the same exposure?
- a.The maximum spacing is unchanged
- b.The footing depth does not appear in the table
- c.The maximum spacing gets larger
- d.The maximum spacing gets smaller✓
At exposure B, 30 inches allows 97 inches and 24 inches allows 66, and at exposure C, 36 inches allows 88 and 30 inches allows 68. A shallower footing means closer posts, so the spacing gets smaller, not larger or unchanged, and footing depth is in the table.Vinyl fence maker installation manual, Maximum Post Spacing and Footing Dimensions
What does the vinyl manual say to do when a vinyl post must be installed on an existing concrete slab?
- a.Core drill, set a steel post in cement and sleeve the vinyl post over it✓
- b.Screw the vinyl post to the slab surface with lag bolts
- c.Glue the vinyl post to the slab surface with caulk
- d.Set the vinyl post in a bed of dry sand on the slab
The manual's method is to core drill, set a galvanized steel post in hydraulic cement and slide the vinyl post over the steel, with the steel going at least halfway up. Lag bolts, sand and caulk are not described.Vinyl fence maker installation manual, Alternative Fence Installations
What steel post size does the manual use inside a 4-inch vinyl post on a slab?
- a.1/2 inch outside diameter
- b.3 inch outside diameter
- c.1-7/8 inch outside diameter
- d.1-5/8 inch outside diameter✓
A 4-inch vinyl post is set over a 1-5/8-inch OD steel post, and a 5-inch vinyl post over a 1-7/8-inch OD steel post. Three inches and 1/2 inch are not the sizes.Vinyl fence maker installation manual, Alternative Fence Installations
What problem does the manual warn about when concrete is used inside a vinyl post in a freeze-thaw climate?
- a.Post cracking over time, with no warranty coverage✓
- b.Sagging of the top rail under its own weight
- c.Loss of the gate latch spring over several years
- d.Rust forming on the concrete inside the post
The manual cautions that in climates with freeze-thaw cycles this method could result in post cracking over time, not covered by the warranty. Rust, latch loss and rail sagging are not the stated problem.Vinyl fence maker installation manual
How much clearance does the manual require under the bottom rail of a gate on level ground?
- a.6 inches
- b.1/4 inch
- c.2 inches✓
- d.1/2 inch
The manual says a gate requires 2 inches of clearance under the bottom rail on level ground. Half an inch and a quarter inch are less than the clearance the manual requires, and six inches is too much for most uses.Vinyl fence maker installation manual, Gates
What size drain holes does the vinyl manual say to drill in a field-built gate's bottom rail?
- a.1/4 inch✓
- b.3/4 inch
- c.2 inches
- d.1 inch
The manual says to ensure 1/4-inch drain holes are drilled in the bottom rail of a gate built in the field. One inch is the rail-end expansion gap, 3/4 inch is the latch gap, and 2 inches is the ground clearance.Vinyl fence maker installation manual, Gates
In the post-and-rail style section of the vinyl manual, what hinge-side and latch-side gaps does it give for the gate?
- a.1 inch at the hinge side and 3/4 inch at the latch side
- b.No gap on either side of the gate leaf
- c.3 inches on both sides of the gate leaf
- d.1-1/2 inches at the hinge and 1-1/4 inches at the latch✓
The post-and-rail section of the manual allows a 1-1/2-inch gap on the hinge side and 1-1/4 inches on the latch side, while the picket styles allow 1 inch and 3/4 inch, so the style named in the question decides. Three inches and none are not given.Vinyl fence maker installation manual, Hang Gate/Install Hardware
What is the composite maker's recommended section width on center of the posts for its fence?
- a.8 feet (96 inches)✓
- b.6 feet (72 inches)
- c.4 feet (48 inches)
- d.10 feet (120 inches)
The maker says sections should be 8 feet (96 inches) wide on center of the posts. Six feet is the fence height, and 10 and 4 feet are not stated.Composite maker knowledge base, installing the fence
What expansion gap does the composite maker specify between slat and post?
- a.40 mm
- b.20 mm
- c.0 mm
- d.4 mm✓
The maker says an expansion gap of 4 mm should be left between the fence slat and post. Twenty millimeters is the clearance at the top of the panel, forty is not stated, and zero leaves no room for expansion.Composite maker installation guide (metric)
How many slats make up a standard 1.8 m (6 ft) fence height in the same guide?
- a.12✓
- b.18
- c.24
- d.6
The guide gives 12 slats for a standard 1.8 m (6 ft) height. Six slats are too few for that height, and 18 or 24 slats are more than the guide lists.Composite maker installation guide (metric)
Center-to-center post spacing for a panel system equals what?
- a.Panel length times two, for a double panel
- b.Panel length minus the gaps at each end
- c.Panel length plus gaps plus post width✓
- d.The post width alone, with no panel length
The spacing is the panel length plus the expansion gaps plus the width of the post, as in the maker's 1,774 mm plus 100 mm. Subtracting, doubling and using the post width alone do not describe it.Composite maker installation guide (metric)
In the same guide, how are slats cut to follow a slope?
- a.Mitred to the slope, or the bottom slat ripped to it✓
- b.Cut square and left to overhang the posts
- c.Left uncut, with the posts cut off square instead of the slats
- d.Bent by heating them over a flame
The guide says slat ends can be mitred to the angle of the slope, or the bottom slat can be ripped to the slope with the bottom panel cap in place. Leaving overhangs, bending and cutting posts are not the methods.Composite maker installation guide (metric)
How should composite slats be stored, according to the maker?
- a.Leaning on end against a wall in the shade
- b.Flat and level, on supports 500 mm apart✓
- c.Bundled upright in the sun until needed
- d.Stacked directly on bare soil beside the job
The guide stores products flat and level, supported above the ground at 500 mm intervals, with bearers no more than 500 mm apart so boards do not bow. Leaning, ground contact and upright bundles would warp or soil them.Composite maker installation guide (metric), Material Storage
What does the maker say about moving composite slats?
- a.Lift and set down; never slide slats on each other✓
- b.Slide them across each other to save time
- c.Throw them onto the pile near the posts
- d.Drag them behind a truck to the fence line
The guide says to lift the slats and set them down, and not to slide slats against each other or drag equipment across them. Sliding, dragging and throwing damage the surface.Composite maker installation guide (metric), Material Handling
What blade does the maker recommend for the cleanest cuts in composite slats?
- a.A 12-tooth framing blade for fast cutting
- b.A masonry abrasive blade for dense material
- c.A chain saw bar for long rip cuts
- d.A thin kerf 40-tooth finish blade✓
The guide recommends a thin kerf 40-tooth alternate top bevel finish blade. A coarse framing blade, an abrasive blade and a chain saw tear or chip the surface.Composite maker installation guide (metric), Recommended Tools
How does a hollow composite post mount over a concrete pad, according to one composite maker?
- a.It is nailed to the pad surface with masonry nails
- b.It sleeves over a steel or wood support, or is embedded✓
- c.It is set loose on the pad and held by its weight
- d.It is glued directly to the pad with construction adhesive
The maker says its hollow posts can be sleeved over steel or wood supports or embedded in the pad or wall, after checking that the pad can support a fence and wind. Glue, nails and a loose post cannot resist wind loads.Composite maker knowledge base, installing a fence post
What does the aluminum bottom rail do in a composite fence system?
- a.It adds strength so the fence does not sag✓
- b.It provides the gate latch for the walk gate
- c.It replaces the posts between the sections
- d.It holds the post caps on top of the posts
The aluminum bottom rail provides strength to protect against sagging, and composite bottom rail covers sleeve over it. It does not hold caps, replace posts or provide the latch.Composite maker knowledge base, installing the fence
What is the correct approach to laminate fence panels, for which no public installation standard is cited?
- a.Seal the cut edges with roofing tar
- b.Ignore the maker's spacing and use ordinary wood spacing
- c.Follow the maker's instructions for cuts and gaps✓
- d.Treat them like pressure-treated lumber
Because the layered or faced panels behave differently from plain boards, the manufacturer's instructions for cutting, fastening, spacing and gaps control the installation. Treating them as lumber, tarring cuts or ignoring spacing has no support.CSLB C-13 study guide 13E-13 (composite and laminate); manufacturer instructions vary
Which gate description fits Section 115923 for a single-family-home pool enclosure?
- a.Opens either way, closed by hand, with a latch at 54 inches
- b.Opens away, self-closing, self-latching, latch no lower than 60 inches✓
- c.Opens toward the pool, self-closing, with a latch at 48 inches
- d.Opens away from the pool, with a hook latch at 36 inches
The statute requires access gates that open away from the pool, are self-closing, and have a self-latching device placed no lower than 60 inches above the ground. Inward swing, hand-closed gates and low latch heights fail the requirements.Cal. Health & Safety Code 115923(a)
Under the Swimming Pool Safety Act, a swimming pool is any structure with water over what depth?
- a.24 inches
- b.18 inches✓
- c.36 inches
- d.12 inches
The definition covers any structure intended for swimming or recreational bathing that contains water over 18 inches deep, including spas, hot tubs and portable and wading pools. The other depths are not the definition.Cal. Health & Safety Code 115921(a)
A permit is issued for a new pool at a single-family home. How many of the seven drowning-prevention safety features must the pool have?
- a.At least two✓
- b.All seven
- c.At least one
- d.At least four
The pool shall be equipped with at least two of the seven features. One would not meet the statute, and four or all seven are more than it requires.Cal. Health & Safety Code 115922(a)
Which pools are outside the Swimming Pool Safety Act's requirements under Section 115925?
- a.Any pool with an in-ground gunite shell
- b.Public pools and pools at apartment complexes✓
- c.Pools at single-family homes with a permit
- d.Remodeled pools at single-family homes
The Act does not apply to public swimming pools, hot tubs or spas with locking safety covers meeting ASTM F1346, or apartment complexes and other residential settings that are not single-family homes. Single-family pools, remodels and construction type do not exempt a pool.Cal. Health & Safety Code 115925
Which pair counts as the two required features for a single-family-home pool?
- a.An exit alarm on one door and a latch on another door
- b.An exit alarm and a self-closing latch on the same door
- c.A compliant enclosure and exit alarms on the pool doors✓
- d.A safety pool cover and an alarm placed in the pool
An enclosure plus exit alarms combines features 1 and 4. The statute says an exit alarm and latch on the same door, a cover and an alarm, and an exit alarm and a latch on separate doors do not satisfy the requirement.Cal. Health & Safety Code 115922
At what height must the release of a self-closing, self-latching device on a home's door to the pool be placed, under the seven-feature list?
- a.No lower than 54 inches above the floor✓
- b.No higher than 54 inches above the floor
- c.No lower than 60 inches above the floor
- d.No lower than 36 inches above the floor
Feature 5 places the release no lower than 54 inches above the floor. The 60-inch figure belongs to the enclosure gate latch, and the other two do not match.Cal. Health & Safety Code 115922(a)(5)
Removable mesh fencing counts as a drowning-prevention feature only if it meets which standard and has what kind of gate?
- a.ASTM F668, with any gate that the owner chooses to install
- b.ASTM F2286, with a self-closing, self-latching, lockable gate✓
- c.ASTM F900, with a hasp that holds a padlock on the gate
- d.ASTM F1043, with a spring latch fixed at the owner's chosen height
Feature 2 requires mesh fencing meeting ASTM F2286 with a gate that is self-closing and self-latching and can accommodate a key lockable device. F668, F900 and F1043 are fabric, swing-gate and framework standards.Cal. Health & Safety Code 115922(a)(2)
When must the local building official inspect the drowning-prevention features on a permitted pool?
- a.After a neighbor files a complaint about the pool
- b.Before giving final approval of the permitted work✓
- c.Once a year after the pool has been filled
- d.When the pool is first filled with water
The statute says that before issuing final approval the official shall inspect the features and, if no violations are found, give final approval. A complaint-driven visit, a yearly inspection and a fill-time inspection are not what it says.Cal. Health & Safety Code 115922(c)
What does the pool enclosure statute require of the outside surface of the barrier?
- a.It must be painted a light color so it is easy to see
- b.It must have no handholds or footholds for a child under five✓
- c.It must be smooth-faced on the inside surface
- d.It must have horizontal rails on the outside for support
The statute requires an outside surface free of protrusions, cavities or other characteristics that would serve as handholds or footholds enabling a child below age five to climb over. Color and inside-only smoothness are not the rule, and outside horizontal rails are a climbing aid.Cal. Health & Safety Code 115923(e)