Nevada C-15 Roofing and Siding Contractor Examination

Under OSHA 1926.501, at what height above a lower level must roofing employees on unprotected sides and edges be protected from falling?

• A6 feet
• B4 feet
• C10 feet
• D15 feet

How does OSHA 1926.500 define a low-slope roof for fall-protection purposes?

• AA slope less than or equal to 2 in 12
• BA slope less than or equal to 3 in 12
• CA slope less than or equal to 4 in 12
• DA slope less than or equal to 6 in 12

On a low-slope roofing job with no mechanical equipment, how far from the roof edge must an OSHA warning line be erected?

• ANot less than 6 feet
• BNot less than 4 feet
• CNot less than 10 feet
• DNot less than 15 feet

After it is erected, an OSHA warning-line rope, wire, or chain must stay between what heights above the walking/working surface, including sag?

• A21 to 28 inches
• B30 to 34 inches
• C34 to 39 inches
• D39 to 45 inches

A crew is installing asphalt shingles on a 6:12 roof 18 feet above grade. Which fall-protection option is permitted by OSHA 1926.501(b)(11)?

• AA warning-line system and a safety monitor
• BA safety-monitoring system used alone
• CA guardrail system with toeboards, a safety-net system, or a personal fall-arrest system
• DA controlled-access zone without conventional fall protection

A 2-foot by 2-foot skylight opening is a hole under OSHA 1926.500. What load must a cover over that hole support?

• AAt least twice the weight of employees, equipment, and materials that may be imposed on it
• BThe weight of one employee only
• C500 pounds regardless of the work
• D5,000 pounds, the same as a fall-arrest anchorage

Unless a qualified person designs the complete system with a safety factor of at least two, a personal fall-arrest anchorage must be capable of supporting how much per employee attached?

• A1,800 pounds
• B3,000 pounds
• C5,000 pounds
• D10,000 pounds

When may a safety-monitoring system be used by itself, without a warning line, on a low-slope roofing job?

• AOnly on roofs 50 feet or less in width
• BOn any low-slope roof if the monitor is a competent person
• COnly on roofs steeper than 4:12
• DWhenever mechanical equipment is operating on the roof

Per IBC 2018 §1507.2.1, to what kind of deck must asphalt shingles be fastened?

• ASolidly sheathed decks
• BSpaced 1x4 sheathing only
• COpen steel purlins without a deck
• DGypsum formboard without nailable sheathing

In roofing estimating, what roof area does one square represent?

• A10 square feet
• B50 square feet
• C100 square feet
• D144 square feet

Which roof deck is treated as nailable for mechanically fastened steep-slope coverings?

• AWood structural-panel sheathing of adequate thickness
• BStructural concrete without a nailing overlay
• CSteel deck without wood nailers or a nailable overlay
• DPoured gypsum without a nailable overlay

In a heated building with a cold-roof or vented attic, where is a vapor retarder placed in the roof assembly?

• AOn the warm-in-winter side of the insulation
• BOn the cold exterior face of the insulation
• CBetween the shingles and the underlayment
• DVapor retarders are never used under steep-slope roofs

What does IBC 2018 Chapter 15 include in a roof assembly?

• AThe roof covering, roof deck, and any vapor retarder, insulation, or similar substrate th…
• BOnly the weatherproof membrane or shingles
• COnly structural joists and rafters
• DOnly rooftop HVAC equipment

Which rigid board is the usual above-deck thermal insulation on low-slope roofs?

• APolyisocyanurate (polyiso) board
• BOpen-cell fiberglass batt laid loose on the steel deck
• CMineral-surfaced roll roofing
• DNo. 30 organic felt

When foam-plastic insulation is used in a roof assembly over a steel deck, which additional IBC requirement must be checked besides Chapter 15?

• AIBC Chapter 26 foam-plastic thermal-barrier and ignition-barrier rules
• BIBC Chapter 29 plumbing-fixture counts
• CIBC Chapter 10 means-of-egress width only
• DNo other chapter applies to foam plastics in roofs

A new low-slope roof must meet IBC 2018's 1/4:12 design-slope rule, but the steel deck is dead level. What substrate method is used to create that slope?

• AUse tapered insulation or a sloped fill to create the design slope
• BInstall extra gravel until water runs off
• CIgnore slope because reroofing never needs 1/4:12
• DSwitch to coal-tar BUR, which IBC allows at zero slope

Where IBC 2018 allows spaced sheathing under wood shakes, what is the minimum board size and how is the spacing set?

• A1x4 nominal boards spaced on centers equal to the weather exposure
• B1x3 boards spaced 24 inches on center regardless of exposure
• C2x8 boards butted tight as a solid deck only
• DPlywood clips without boards

Before new coverings are applied, what is the first substrate check a C-15 contractor should make on an existing deck?

• AConfirm the deck is dry, sound, and able to hold fasteners and the new roof load
• BPaint the deck so fasteners hide better
• CCover wet plywood immediately so it can dry under the new roof
• DSkip deck inspection if the old covering looks intact from the ground

What is the main job of a cover board installed over roof insulation on a low-slope assembly?

• ATo protect the insulation from hail, foot traffic, and fastener puncture and to stiffen t…
• BTo replace the membrane as the waterproof layer
• CTo serve as the vapor retarder on the cold side of the roof
• DTo create the required 4:12 steep-slope for shingles

Insulation and a single-ply membrane are being installed over a fluted steel deck. How must fasteners and boards be arranged relative to the flutes?

• AFasteners must engage the top flange and boards must have continuous bearing; they cannot…
• BBoards may cantilever any distance past the last flute
• CFasteners should miss the steel and bite only the insulation
• DSteel decks cannot receive any mechanically attached roof system

Why are wood nailers installed at the perimeter of a low-slope insulated roof?

• ATo provide a nailable, dimensionally matching substrate for edge metal, blocking, and mem…
• BTo replace the need for edge metal
• CTo act as the building's structural roof beam
• DTo create a cricket behind a wide chimney

What is the minimum roof slope IBC 2018 allows for asphalt shingles?

• A2:12
• B1/4:12
• C3:12
• D4:12

A standard three-tab asphalt-shingle square is usually packaged as how many bundles?

• AOne bundle
• BTwo bundles
• CThree bundles
• DSix bundles

On a 3:12 asphalt-shingle roof, how must underlayment be applied under IBC 2018 Table 1507.1.1(2)?

• ATwo layers: a 19-inch eave starter strip, then 36-inch sheets lapped 19 inches
• BOne layer lapped 2 inches is enough at any slope
• CNo underlayment is required below 4:12
• DUnderlayment is applied vertically from ridge to eave only

Unless the manufacturer requires more, what is the IBC 2018 minimum fastener count for a strip asphalt shingle?

• AFour fasteners per strip shingle or two per individual shingle
• BTwo fasteners per strip shingle
• CSix fasteners per strip shingle on every roof
• DStaples only, with no nails

Which fastener meets IBC 2018 §1507.2.5 for asphalt shingles?

• AUncoated drywall screws
• B1-inch roofing staples regardless of manufacturer
• CGalvanized, stainless, aluminum, or copper roofing nails, 12-gage minimum shank, 3/8-inch…
• DCommon 16d framing nails driven flush

Where an ice barrier is required by IBC 2018 §1507.1.2, how far must it extend?

• ATo a point 12 inches up from the eave edge, measured on the roof surface
• BOnly across hips and ridges
• CFrom the lowest edges of all roof surfaces to a point not less than 24 inches inside the…
• DOver the entire roof regardless of climate

Which materials does IBC 2018 accept as an ice barrier?

• AA single layer of No. 15 felt
• BLoose gravel in the gutter
• CNot fewer than two layers of underlayment cemented together, or a self-adhering polymer-m…
• DA layer of building paper over the shingles

How must drip edge and underlayment be layered at the eaves of an asphalt-shingle roof under IBC 2018 §1507.2.8.3?

• ADrip edge over the underlayment at eaves; underlayment over the drip edge at rakes
• BDrip edge is required only at the ridge
• CUnderlayment over the drip edge at eaves; drip edge over the underlayment at rakes
• DUnderlayment always covers the drip edge on every edge

What are the IBC 2018 lap, roof-flange, and fastener-spacing minimums for asphalt-shingle drip edge?

• A1-inch laps, 1-inch roof flange, fasteners 24 inches on center
• B4-inch laps, 6-inch roof flange, fasteners 6 inches on center
• C2-inch laps, 2-inch roof flange, fasteners not more than 12 inches on center
• DNo lap required if the joints are butted

What does an IBC Class A roof assembly resist?

• ALight fire-test exposure only
• BModerate fire-test exposure
• CSevere fire-test exposure
• DNo fire exposure; Class A is a wind rating

Which tests does IBC 2018 §1505.1 use for Class A, B, and C roof assemblies?

• AASTM E84 only
• BASTM D226 only
• CASTM E108 or UL 790
• DNFPA 13 sprinkler listing

Above what slope does IBC 2018 §1507.2.6 send asphalt-shingle attachment to the manufacturer's steep-slope instructions?

• A4:12
• B12:12
• C21:12
• DNo slope limit exists

What is the IBC 2018 minimum slope for clay or concrete roof tile, and when is double underlayment required?

• A2:12 minimum; double underlayment never required
• B3:12 minimum; double underlayment only above 8:12
• C2-1/2:12 minimum; double underlayment from 2-1/2:12 to 4:12
• D4:12 minimum with no underlayment

What minimum slopes does IBC 2018 assign to wood shingles and wood shakes?

• ABoth 2:12
• BBoth 4:12, with shakes allowed at 2:12 if felted
• CWood shingles 1/4:12; wood shakes 2:12
• DWood shingles 3:12; wood shakes 4:12

What is the IBC 2018 minimum slope for slate shingles?

• A1:12
• B2:12
• C3:12
• D4:12

What minimum slope does IBC 2018 §1507.4.2 set for a standing-seam metal roof panel system?

• A1/4:12
• B2:12
• C3:12
• D4:12

A gable roof is 36 feet long by 24 feet wide in plan and has a 6:12 slope. Using a 6:12 factor of 1.118, how many squares of covering are on the roof before waste?

• A8.6 squares
• B11.2 squares
• C12.0 squares
• D9.7 squares

A roof has 2,400 square feet of sloped surface. Allow 10 percent waste and order three-tab shingles at 3 bundles per square. How many bundles should be ordered?

• A72 bundles
• B75 bundles
• C81 bundles
• D90 bundles

An ice barrier must reach 24 inches inside the exterior wall. The eave overhang is 18 inches and the roof is 6:12 (factor 1.118). About how far up the roof slope must the barrier extend?

• A24 inches
• B36 inches
• C42 inches
• D47 inches

For an open metal valley on an asphalt-shingle roof, what is the IBC 2018 minimum lining width?

• A12 inches
• B18 inches
• C24 inches
• D48 inches

Under IBC 2018 §1503.5, when is a cricket or saddle required behind a chimney or roof penetration?

• AOn every penetration, including 6-inch vents
• BOnly when the roof is low-slope
• CNever; step flashing replaces a cricket
• DWhen the chimney or penetration is greater than 30 inches wide measured perpendicular to…

What is the purpose of the starter course at the eave of an asphalt-shingle roof?

• ATo replace drip edge and underlayment
• BTo serve as ridge cap later in the job
• CTo create the ice barrier by itself
• DTo provide adhesive and tab coverage so the first course is sealed and the joints are off…

Nails placed above the manufacturer's nailing line on a laminated shingle most often cause which failure?

• AThe sealant strip bonds too tightly
• BThe ice barrier is punctured at the ridge
• CThe underlayment becomes Class A
• DBlow-off or tab lift because the fastener misses the double-thickness zone and the shingl…

A three-tab shingle measures 12 inches by 36 inches and is laid at a 5-inch exposure. How many shingles are required to cover one square?

• A66
• B72
• C80
• D100