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3E351B3

CDC II

QuestionAnswer
(401) What built-up roof member provides the hard surface for the entire roof and must be strong enough to support the roofing felts, asphalt or coal tar pitch, and gravel that covers it? Roof deck.
(401) How many felt layers does a 10-year built-up roof have? Three.
(401) On what roof types do you usually use coal-tar pitch and asphalt bitumens? Coal-tar is used on dead level roofs; asphalt is used on roofs with more slope.
(401) What reliable test can you do to tell if a built-up roof is made from asphalt or coal tar? Solvent test.
(401) What component would you install that would provide a continuous watertight connection between the roofing membrane and other structural parts, and between roof sections? Flashing.
(401) What is a structural separation on a built-up roof that is designed to minimize building stress and movement and to control splitting or ridging in the roof membrane? Expansion joint.
(401) What would you do to make a major correction when installing felt on a built-up roof? Cut off the felt and start over.
(401) Which flashing would you install around anything that penetrates or protrudes from the roof surface? Subflashing.
(402) Which roof covering system includes vulcanized thermosets? Single-ply.
(402) What is the common life expectancy of a single-ply roof system? 20- + years.
(402) Which roof system can be heat or solvent welded together? Thermoplastics.
(402) What are the three common installation methods for single-ply membranes? Loose-laid ballasted, mechanically attached, and fully adhered.
(402) What is the first step in installing a single-ply roof membrane?Ensure that the deck area is clean, and the substrate is clean, smooth, and dry Splitting, blistering, and ridging.
(402) Loose-laid ballasted concept prevents what three major problems? Blistering, alligatoring, and bubbling.
(403) When installing roofing on a temporary building, what type of roofing system would you use? Roll roofing.
(403) On a rolled roof, what two common methods do we use to flash around pipes or other penetrations? Single coverage and Double coverage.
(404) When a roof continues to leak despite maintenance and repair efforts, it is assigned to what roof category? Red.
(404) How often do you inspect a low-slope roof in the red category? Annually.
(404) When a roof is under a warranty, performance agreement, or some other contractual tie to a contractor or manufacturer it is assigned to what roof category? Yellow.
(404) During what season do you make a detailed inspection on a roof in the green category? Spring.
(404) During what season do you make a follow-up inspection made on a green category roof? Late fall.
(405) What roof condition is characterized by foot traffic patterns, wind-scoured corners, water washed bare spots, or deteriorated felt due to bitumen loss from chemical or physical attack? Eroded bituminous surfaces.
(405) What roof condition is repaired by making an “X”, peeling back the corners of the cut, working mastic into the cavity, and then pushing the corners back onto place? Broken blisters.
(405) What roof condition can be controlled or stabilized by installing straps? Membrane slipping.
(405) A roof’s permanent repair should last at least? up to its remaining service life.
(406) Before repairing a single-ply roof, what would be your first step? Determine what type of roofing membrane it is.
(406) What is the most important factor for a good repair on all single-ply membranes? Clean surface.
(406) What do we use on all single-ply membrane repairs to apply pressure, bond the two surfaces together, smooth out, and avoid trapping air? Small roller.
(407) The two most common types of composition asphalt shingles are? organic and fiberglass.
(407) What size are 3 tab strip shingles? 12-inch by 36-inch.
(407) What is the minimum roof slope required to install strip shingles over a single thickness of asphalt-saturated felt? 4:12 or greater.
(407) How many square feet are in one bundle of shingles? 33 1/3.
(407) How much overhang do you allow for when installing the drip edge to the eaves? 4 to 6 inches.
(407) When installing the shingle starter course, allow it to overhang the drip edge? ¼ inch to 3/8 inch.
(408) What three factors affect weathering of composition asphalt shingles? Direction of exposure, climate, and roof slope.
(408) What is the usual installation defect associated with asphalt strip shingles? Improper nail placement.
(408) When replacing a tile, what amount of adhesive do you apply to surrounding tiles? 3/8-inch bead and 1– square inch.
(409) A patina coating forms on weather exposed copper.
(409) What are two advantages of using galvanized steel sheets fro roofing, rather than using aluminum or copper? It is lower in cost and greater in strength.
(409) Which roofing seams do we secure with cleats? Batten, standing, and grooved.
(409) When you install metal roofing with lap seams, the sidelap directions are determined by the prevailing wind.
(409) What is the minimum sidelap in installing corrugated roofing? 1 1/2 corrugations.
(409) On a grooved (flat) seam metal roof, be sure you make proper notches so that you can get a good solder joint.
(409) Solder seams on a grooved (flat) seam roof when there is less than a 3-inch slope.
(410) Copper roofing we usually install with which type seams? Batten, standing, and grooved (flat).
(410) How would you repair galvanized roofing if a puncture is too large to solder? Replace the entire sheet.
(410) Aluminum roofing you repair by patching or replacing.
(410) Standing seam panels are produced with what type seams? 2- or 3- piece.
(411) Gutter and downspouts are typically made from what types of metal? Galvanized steel, stainless steel, copper, and aluminum.
(411) What determines the ferrule length for hanging a gutter? Gutter width.
(411) In a gutter system downspout, we use elbows to make offsets and turns.
(411) How far apart are gutter hangers installed? No more than 30 inches on center.
(411) After making the chalkline to install a new gutter, the next step is to install hangers, starting at the high end.
(411) Minor gutter and downspout repairs include refastening hangers and resealing joints.
(411) After you replace a section of gutter, pour water in the gutter to check for drainage.
(411) What do you do to increase flow from the gutter to the downspout? Increase the drop.
(412) What do manufacturers usually do to aluminum siding sheets to reduce corrosion and improve appearance? Coated with zinc and painted.
(412) What is the head shape of the self-drilling screws that we use to install metal siding? Hex.
(412) At which end of a building do you start installing metal siding? The end of the building toward which the prevailing winds blow.
(412) After drilling the holes to attach a patch to metal siding, remove the patch to deburr the back of the patch and remove the metal chips.
(413) What are the three essential properties required for siding? Good painting characteristics, easy working qualities, and freedom from warp.
(413) Why do you stain finish the rough or sawn side of beveled siding? Wood stain works best and lasts longer on rough wood surfaces.
413) What do you apply to the walls before you install the siding if housewrap has not already been applied? A breathable-type building paper.
(413) If you are installing vertical tongue and groove siding on plywood or board sheathing, place the nails 16 to 24 inches on center.
(413) What is the minimum lap for bevel siding? 1 inch.
(414) Hip-roof structures can be best ventilated by installing soffit vents and outlet ventilators along the ridge.
(414) Moisture vapor rising from the soil in a crawl space under the house or porch may condense on wood below the floor and cause decay.
(415) For what security level are wooden fences typically used? Low to moderate.
(415) Which type of fence is designed to mark territories, and perimeters? Boundary.
(415) Following the contour of the terrain when building your fence is the easiest option.
(415) The normal practice is to dimension gate posts one size larger than line posts, because they bear a greater load.
(415) The rule of thumb is to set fence posts in the ground at least one-third of their length.
(415) How much deeper than line posts do we set gate, corner, and terminal posts? 12 inches.
(415) What is the purpose of the stringer (rail) fence components? Carry the load of the infill and join posts to each other.
(415) What is the most common reason repair of gates? Sagging.
(415) When applying a finish, the more care you take in the surface preparation and application ensures the finish will last longer.
(416) Which wall panel is fire retardant? Gypsum board.
(416) Which wall panel serves as a vapor barrier on exterior walls? Foil-backed board.
(416) The recommended way to cut gypsum board with a saw is to cut with the finish side up to keep from damaging the finished surface.
(416) How much space do you leave between the joints of gypsum board? ⅛ inch.
(416) You install gypsum board on a ceiling so that the long dimension is at a right angle to the joist and the sheets are staggered at the end joints.
(416) If the building plans call for two gypsum board layers, how do you install them? The first layer vertical and the second layer horizontal.
(417) What is the purpose of the tape in taping and floating gypsum board? It holds the joint compound in place and gives the joint tensile strength.
(417) After the first joint compound coat dries, how long is it before you can apply a second coat? Twenty four hours.
(417) After applying the third coat of joint compound, what can you do to check the finished Shine a bright light along the wall and ceiling.
(417) How do we refer to the second coat of joint compound and how much must it be feathered out beyond the edges of the first coat? Fill coat. At least 2 inches.
(417) What are the two most common types of spray-on acoustical ceiling textures for walls? Orange-peel and knockdown.
(417) Three types of hand-applied textures are roller textures, knockdown roller finishes and hand-trowel finishes.
(418) If a fastener has popped, how far away do you place another? 1½ inches.
(418) The easiest method to repair larger holes, such as those created from doorknobs, is to cover the hole with a self-adhesive metal and fiberglass repair patch.
(418) If you are using the paper-flange patch repair method, what size do you cut the gypsum board patch if the hole is 12 inches square? 16 inches square.
(419) What are the most common thicknesses of wood paneling? 3/16 inch and ¼ inch.
(419) What is the thinnest wood panel that you can install directly to the studs without backing 3/8 inch.
(419) The recommended way to cut paneling with a circular saw or handsaw is to cut from the back side with a circular saw and from the face side with a handsaw.
(420) If a manufacturer uses too much drier in paint, the paint will not be durable.
(420) What do we usually use on most surfaces except fresh concrete, masonry, or plaster? Alkyd.
(420) Which ingredient gives paint its color? Pigment.
(420) Polyurethane surpasses ordinary varnishes in abrasion resistance, durability, and gloss.
(421) The longer you leave stain on a piece of bare wood, the darker the color (tone) will be.
(421) To produce the best finish using varnish, how do you apply it? Several thin coats.
(421) After one coat dries hard when applying transparent finishes, what do you rub the surface lightly with before you apply the next coat? Steel wool.
(421) In what direction do you rub the surface with pumice and oil after the varnish is thoroughly dry and hard? With the grain.
(421) When applying transparent finishes, how long should you allow for drying between coats? 24- hours.
(421) What type of finish do you usually reserve for your finest cabinets and tables? Hand rubbing with pumice.
(422) What is the most common thickness of the underlayment sheets we use under asphalt or vinyl tile? ¼ inch.
(422) When laying out border tiles using 12 by 12 inch tile, move the centerline 6 inches if the initial border tile measurement is less than 6 inches.
(422) Where do you place the first asphalt or vinyl floor tile to be installed in a room? In the center.
(423) What is the first suspended ceiling component to be installed? Wall angle.
(423) In relation to a chalkline you snap on the wall, how do you install the wall molding for a suspended ceiling? Nailed with the top aligned with the chalkline.
(423) What spacing is required for tie wires in a suspended ceiling? The first wire should be above the first cross tee and then space a wire every 4 feet.
(423) Cut suspended ceiling panels to size with a utility knife.
(424) Close-grained wood is recommended for trim that is going to be painted a solid color.
(424) When temporarily nailing side casings in place, what size casing or finish nails do you use along the jamb edge and along the outer edge? 6d jamb edge and 8d outer edge.
(424) Which of these is the right order of installing interior window trim? Side casing, head casing, and then the apron.
(424) Which trim member fits on top of the baseboard? Base cap.
(424) Which molding runs along the wall about 12 to 16 inches below the ceiling? Picture.
(424) At what height from the floor do we usually install chair-rail molding? 32 inches.
(425) How much space do you leave between the countertop of the base unit and bottom of the wall unit? 18 inches.
(425) Which saw cuts on the downstroke, will not splinter the face, and should be used when trimming wall units? Handsaw.
(425) When making sink cutouts, what type of saw do you use to prevent chipping the surface? Saber.
(425) How many hinges do you install on any cabinet door that is longer than 2 feet? 3.
(402) What is the first step in installing a single-ply roof membrane? Ensure that the deck area is clean, and the substrate is clean, smooth, and dry.
(419) How do we install board (solid wood) paneling in relation to the wall framework? Vertically.
(425) How much wider and longer than the surface to be covered do you cut laminate? ¼ to ½ inch.
Created by: leocriz50