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The NV-C15 exam has 60 questions and runs 2 hours.
These 10 free NV-C15 questions are organized by exam domain, so you can see how each part of the Nevada C-15 Roofing and Siding Contractor Trade Exam blueprint is tested. Reveal the answer and explanation under each question.
For a shingle tear-off, workers will approach unprotected eaves 12 feet above the ground on a 7:12 roof. The roof is 32 feet wide. Under OSHA construction fall-protection rules, which arrangement is permitted for this work?
Correct answer: C - Compliant personal fall-arrest systems with suitable anchors, clearance, and rescue provisions.
Delivery labels identify roof-deck panels as APA RATED SHEATHING, 32/16, Exposure 1. The rafters are 24 inches on center, and the specified panel thickness, loading, orientation, and edge support are satisfied. Which inspection comment correctly interprets these markings?
Correct answer: C - The roof spacing is acceptable; the panels still need permanent roofing protection.
A 3:12 porch roof will receive asphalt shingles under the 2018 International Building Code. The selected shingles permit this slope, and the specification calls for conventional felt rather than a self-adhering underlayment alternative. Which underlayment approach is required?
Correct answer: D - Provide the double-underlayment application over the entire roof plane.
The takeoff for a simple gable roof shows a 40-by-60-foot horizontal projection for the entire roof, including overhangs. Both planes have a 6:12 slope; use a slope factor of 1.118. Add 10% waste to the sloped area. Field shingles are sold by the bundle, each covering 33 1/3 square feet; starters and ridge caps are ordered separately. What is the minimum number of field-shingle bundles to order?
Correct answer: C - 89 bundles
An engineer has approved up to 8 psf of additional permanent roof load for a tile conversion. The existing covering weighs 250 pounds per roofing square and will be removed; the proposed tile covering weighs 900 pounds per roofing square. All other roof-assembly weights remain unchanged. What does the change in covering weight mean for the approved load allowance?
Correct answer: B - 6.5 psf additional load, within the approved allowance.
Intermittent ceiling stains have prompted a leak investigation, but the roof covering has no obvious breach. Which observation most strongly favors condensation over rain penetration?
Correct answer: D - Droplets form under the deck on clear, cold mornings near ceiling air leaks.
A dropped tool has punctured a cured EPDM roof membrane. Inspection confirms that the surrounding membrane is sound, the insulation beneath the puncture is dry, and the deck is undamaged. Which repair restores watertightness with the least disturbance of sound roofing?
Correct answer: A - Clean and prime the area, then install a compatible EPDM patch.
The asphalt supplier specifies 410-460 degrees F at the point of mopping and a maximum heating temperature of 500 degrees F. Calibrated instruments show 475 degrees F in the kettle and 435 degrees F at application. The dry reinforcing plies are embedding properly, and other installation conditions are satisfactory. The foreman should direct the crew to:
Correct answer: D - Continue mopping while maintaining both temperatures within their respective limits.
Six weeks after horizontal vinyl siding is installed, several courses buckle during hot afternoons and flatten overnight. The wall is flat, the panel locks are fully engaged, and the specified end clearances are present. Nail heads clamp the nailing hems tightly, preventing the panels from sliding. What is the most direct correction?
Correct answer: A - Reset the fasteners to restore head clearance and free horizontal panel movement.
Window flashing is in progress on a wall that will receive fiber-cement lap siding. The sill pan and jamb flashings are complete. The head detail uses metal flashing and a shingle-lapped water-resistive barrier (WRB). Select the arrangement that preserves a continuous outward drainage path.
Correct answer: B - Lap the upper WRB over the head flashing's vertical leg.
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