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3E351B3
CDC II
| Question | Answer |
|---|---|
| (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
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