Download Nevada Lathing and Plastering Contractor C-17 Exam Questions and Answers and more Exams Technology in PDF only on Docsity!
Question 1. Which Nevada Revised Statute (NRS) chapter governs the licensing requirements for a C‑17 contractor? A) NRS 624 B) NRS 111 C) NRS 630 D) NRS 702 Answer: A Explanation: NRS Chapter 624 contains the statutes that define contractor licensing, classifications, bonding, and disciplinary actions in Nevada. Question 2. A C‑17 contractor may legally perform which of the following tasks? A) Installation of interior drywall only B) Application of stucco, lath, and EIFS C) Electrical wiring of residential units D) Structural steel erection above 10 ft Answer: B Explanation: The C‑17 classification specifically permits lath, plaster, stucco, and exterior insulation and finish systems (EIFS) work. Question 3. Under Nevada law, what is the maximum penalty for a contractor who performs work without a valid C‑17 license? A) $500 fine B) Revocation of all contractor licenses C) Up to $5,000 fine per violation and possible criminal charges D) Mandatory community service Answer: C Explanation: Unlicensed contracting in Nevada can result in fines up to $5,000 per violation and may lead to criminal prosecution. Question 4. Which of the following is NOT required for a C‑17 contractor’s advertisement in Nevada? A) Display of the contractor’s license number
B) Statement of “Bonded and Insured” without proof C) Accurate description of services offered D) Inclusion of the business name as on the license Answer: B Explanation: Advertising must include the license number and accurate service description; claiming “bonded and insured” without documentation is prohibited. Question 5. In Nevada mechanics’ lien law, a contractor must serve a preliminary notice to the owner within how many days after first furnishing labor or materials? A) 10 days B) 30 days C) 60 days D) 90 days Answer: B Explanation: Nevada requires a preliminary notice to be served within 30 days of first furnishing labor or materials to preserve lien rights. Question 6. Which type of insurance is mandatory for a Nevada C‑17 contractor? A) Professional liability only B) General liability and workers’ compensation C) Builder’s risk only D) Cyber liability only Answer: B Explanation: Nevada law mandates both general liability and workers’ compensation coverage for contractors. Question 7. When estimating a stucco project, which factor should be added to account for material waste? A) 2 % B) 5 % C) 10 % D) 20 %
Question 11. The inspection sequence for a typical three‑coat stucco system begins with inspection of which component? A) Finish coat texture B) Weep screed placement C) Lath attachment D) Corner bead alignment Answer: C Explanation: Inspectors first verify that the metal lath is properly attached before proceeding to weep screed and subsequent coats. Question 12. According to OSHA, fall protection is required when working at heights of _____ or more above a lower level. A) 4 ft B) 6 ft C) 8 ft D) 10 ft Answer: B Explanation: OSHA mandates fall protection for any work performed at 6 ft or higher above a lower level. Question 13. Which PPE item is specifically required when handling hydrated lime on a stucco job? A) Hard hat B) Hearing protection C) Rubber gloves and goggles D) Steel‑toe boots Answer: C Explanation: Hydrated lime is caustic; workers must wear chemical‑resistant gloves and eye protection. Question 14. When using a powered concrete mixer on a job site, the OSHA requirement for hearing protection is triggered when noise exceeds:_____ dBA.
A) 80 dBA B) 85 dBA C) 90 dBA D) 95 dBA Answer: C Explanation: OSHA requires hearing protection when noise levels reach 90 dBA or higher. Question 15. The maximum allowable load for a standard 2 × 4 wooden scaffold plank is:_____ pounds per square foot (psf). A) 30 psf B) 45 psf C) 60 psf D) 75 psf Answer: C Explanation: OSHA specifies a maximum live load of 60 psf for scaffold decking unless otherwise designed. Question 16. In scaffolding, the required spacing between guardrails on a platform must not exceed:_____ inches. A) 18 inches B) 21 inches C) 24 inches D) 30 inches Answer: B Explanation: Guardrails must be installed so that openings do not exceed 21 inches to prevent falls. Question 17. Which of the following is the correct sequence for installing a weep screed on a new stucco wall? A) Install after the finish coat B) Place at the top of the wall, 8 in above the roof line C) Install 8 in above grade, extending the full length of the wall
Question 21. A “control joint” in a stucco wall is primarily installed to:** A) Provide a decorative line B) Allow for differential movement and reduce cracking C) Increase the wall’s fire rating D) Attach insulation board Answer: B Explanation: Control joints accommodate movement due to temperature changes and substrate movement, preventing random cracking. Question 22. For a foam insulation board substrate, what preparation is required before installing metal lath? A) Apply a cementitious bonding coat B) Install a vapor barrier over the foam C) No preparation; lath can be fastened directly D) Apply a primer designed for foam Answer: D Explanation: A foam‑compatible primer ensures proper adhesion of the lath fasteners to the insulation board. Question 23. Which of the following is the correct water‑to‑cement ratio for a scratch coat mix in a hot, arid Nevada climate? A) 0. B) 0. C) 0. D) 0. Answer: C Explanation: A water‑to‑cement ratio around 0.55 provides workability without excessive shrinkage in hot climates. Question 24. The primary purpose of the “scratch coat” in a three‑coat stucco system is to:** A) Provide final texture
B) Create a key for the brown coat and ensure adhesion C) Serve as the waterproof barrier D) Reduce overall wall thickness Answer: B Explanation: The scratch coat is scored to create a mechanical key that bonds the subsequent brown coat. Question 25. Which additive is commonly used to improve the workability of a stucco mix without increasing water content? A) Calcium chloride accelerator B) Air‑entraining agent C) Plasticizer (water‑reducing agent) D) Sodium silicate Answer: C Explanation: Plasticizers reduce the amount of water needed while maintaining workability. Question 26. During curing, a stucco wall in Nevada should be kept moist for at least:_____ hours after the finish coat is placed. A) 6 hours B) 12 hours C) 24 hours D) 48 hours Answer: C Explanation: Moist curing for a minimum of 24 hours helps achieve strength and reduces shrink‑crack risk, especially in arid conditions. Question 27. Which type of finish coat is most appropriate for a high‑visibility commercial façade requiring a smooth, paint‑ready surface? A) Rough sand finish B) Float‑troweled smooth finish C) Sprayed aggregate finish D) Stippled texture finish
Question 31. When installing an EIFS system over a wood‑frame wall, which substrate preparation is required? A) Apply a 2‑in thick cement board layer B) Install a continuous WRB and ensure it is lapped correctly C) No preparation; EIFS can be attached directly to sheathing D) Apply a vapor barrier over the sheathing only Answer: B Explanation: A continuous WRB must be installed and properly lapped before EIFS attachment to manage moisture. Question 32. The recommended maximum spacing between vertical reinforcement bars in a control joint for a stucco wall is:_____ inches. A) 12 inches B) 24 inches C) 36 inches D) 48 inches Answer: B Explanation: Control joint reinforcement is typically spaced no more than 24 inches apart to distribute stress. Question 33. Which of the following is NOT a typical cause of stucco cracking in Nevada’s desert climate? A) Thermal expansion and contraction B) Improper curing moisture loss C) Over‑reinforcement of the lath D) Substrate movement Answer: C Explanation: Over‑reinforcement does not cause cracking; insufficient reinforcement, thermal movement, curing loss, and substrate shift are common causes. Question 34. The OSHA standard for “hand‑held power tools” requires that tools be inspected at least every:_____ months.
A) 1 month B) 3 months C) 6 months D) 12 months Answer: B Explanation: OSHA requires hand‑held power tools to be inspected at least quarterly (every 3 months). Question 35. In a three‑coat stucco system, the typical thickness of the brown coat is:_____ inches. A) ¼ in B) ½ in C) ¾ in D) 1 in Answer: B Explanation: The brown coat is generally applied to a thickness of about ½ inch to provide levelness and strength. Question 36. Which of the following best describes the “capillary break” concept in WRB design? A) A layer that prevents vapor diffusion B) A discontinuity that stops water from traveling up through the wall assembly C) A decorative element on the exterior D) A type of insulation board Answer: B Explanation: A capillary break interrupts the path for water wicking, preventing moisture from traveling upward through the wall. Question 37. When installing metal lath over a concrete block wall, the minimum embedment depth for fasteners is:_____ inches. A) ¼ in B) ½ in
Explanation: The Nevada Building Code adopts a minimum WRB thickness of 30 mils for moisture protection. Question 41. Which of the following is a required component of a drainable EIFS system? A) A solid, non‑perforated insulation board B) A secondary drainage plane or weep system C) A vapor barrier on the interior side only D) A metal lath over the finish coat Answer: B Explanation: Drainable EIFS must include a secondary drainage plane that allows water to escape. Question 42. When using a power trowel for the finish coat, the recommended speed setting for a smooth texture is:_____ rpm. A) 500‑800 rpm B) 1000‑1200 rpm C) 1500‑1800 rpm D) 2000‑2500 rpm Answer: B Explanation: Power trowels are typically set between 1000‑ 1200 rpm for a smooth finish on stucco. Question 43. Which of the following best describes the purpose of a “corner bead” in stucco work? A) To reinforce the lath at corners B) To provide a neat, straight edge and protect the corner from impact C) To act as a drainage channel D) To attach insulation board to the corner Answer: B Explanation: Corner beads create a crisp, protected edge at wall corners and prevent cracking. Question 44. According to OSHA, what is the minimum required clearance between a scaffold and any overhead power line?
A) 5 ft B) 10 ft C) 15 ft D) 20 ft Answer: C Explanation: OSHA requires a minimum of 15 ft clearance between scaffolding and live overhead power lines. Question 45. For a stucco wall on a wood‑frame structure, the recommended spacing of vertical metal lath straps is:_____ inches on center. A) 12 inches B) 16 inches C) 24 inches D) 36 inches Answer: B Explanation: Vertical metal lath straps are typically spaced at 16 inches on center on wood framing. Question 46. Which of the following is a common sign that a stucco wall’s curing process was inadequate? A) Uniform color throughout the coat B) Presence of surface efflorescence C) Fine hairline cracks across the finish coat D) Increased hardness after 24 hours Answer: C Explanation: Inadequate curing often leads to fine, hairline cracks due to rapid drying and shrinkage. Question 47. When mixing a stucco batch, the “wet‑on‑wet” technique refers to:** A) Applying the finish coat before the brown coat has dried B) Mixing water directly onto the dry mix in the mixer C) Applying a bonding coat while the previous coat is still damp D) Spraying a mist of water onto the wall during application
Question 51. Which of the following is required on a C‑17 contractor’s invoice to comply with Nevada law? A) Detailed labor hours broken down by employee name B) The contractor’s license number and business name as on the license C) A statement of “All work guaranteed for life” D) The contractor’s personal social security number Answer: B Explanation: Nevada law mandates that invoices display the contractor’s license number and business name exactly as licensed. Question 52. When installing metal lath over a masonry substrate, which type of fastener is most appropriate? A) 1‑in wood screws B) ½‑in drywall screws C) 1‑½‑in masonry screws with a washer D) 2‑in self‑drilling metal studs Answer: C Explanation: Masonry screws with washers provide secure attachment into brick or concrete. Question 53. The “scratch” pattern on a stucco scratch coat is created by:** A) Using a steel trowel to smooth the surface B) Scoring the surface with a notched rake or scarifier while the mix is still plastic C) Spraying a water mist onto the coat D) Applying a decorative stencil before the coat sets Answer: B Explanation: Scoring with a notched tool creates the key pattern needed for the next coat’s adhesion. Question 54. Which of the following is a permitted method for repairing delaminated EIFS on a commercial building? A) Removing the entire EIFS system and replacing it B) Applying a new finish coat over the delaminated area without addressing the cause
C) Re‑installing the base coat and reinforcing mesh, then re‑applying the finish coat D) Sealing the delamination with silicone sealant only Answer: C Explanation: Proper EIFS repair requires re‑installing the base coat, mesh, and finish coat to restore the water‑resistive barrier. Question 55. The minimum required fire‑rating for exterior insulation board used in EIFS on a Type III construction is:_____ hours. A) 0.5 hour B) 1 hour C) 2 hours D) 3 hours Answer: B Explanation: The International Building Code requires at least a 1‑hour fire rating for insulation board on Type III construction. Question 56. Which of the following is NOT a typical component of a “bond coat” in a stucco system? A) Portland cement B) Hydrated lime C) Fine sand D) Rigid foam insulation Answer: D Explanation: The bond coat consists of cement, lime, and sand; rigid foam is part of EIFS, not a bond coat. Question 57. According to OSHA, the minimum height for a guardrail on a scaffold platform is:_____ inches. A) 30 inches B) 36 inches C) 42 inches D) 48 inches
Question 61. Which of the following is the correct procedure for testing the compressive strength of a stucco sample? A) Use a rebound hammer on the finished wall B) Cast a 2‑in cube, cure for 28 days, then test in a compression machine C) Perform a slump test on the fresh mix D) Measure surface hardness with a penetrometer after 24 hours Answer: B Explanation: Standard practice is to cure a 2‑in cube for 28 days and test its compressive strength in a lab. Question 62. When installing a metal lath over OSB sheathing, the recommended fastener type is:** A) 1‑in drywall screws B) 1‑½‑in self‑drilling metal studs C) 1‑¼‑in roofing nails D) 2‑in concrete screws Answer: A Explanation: 1‑in drywall screws provide adequate holding power for metal lath on OSB. Question 63. Which of the following is a required step before applying the finish coat on a stucco wall? A) Removing the brown coat completely B) Ensuring the brown coat is fully cured and free of dust C) Applying a second weep screed on top of the brown coat D) Painting the brown coat with a primer Answer: B Explanation: The brown coat must be fully cured and clean to ensure proper adhesion of the finish coat. Question 64. In a drainable EIFS system, the “drainage plane” is typically created by:** A) A solid foam board that does not allow water through B) A perforated drainage mat or weep channels behind the base coat
C) An additional layer of housewrap on top of the finish coat D) A metal flashing installed at the roof line only Answer: B Explanation: Drainable EIFS incorporates a drainage mat or weep channels that form the secondary drainage plane. Question 65. Which of the following is the most common cause of “blistering” in a stucco finish coat? A) Excessive sand in the mix B) Application of the finish coat over a wet brown coat C) Use of a low‑strength cement type D) Installing the lath too tightly Answer: B Explanation: Applying the finish coat over a wet or insufficiently cured brown coat traps moisture, leading to blistering. Question 66. The OSHA standard for “hazard communication” requires that all hazardous chemicals be:** A) Stored in locked cabinets only B) Labeled with the product name, hazard warnings, and manufacturer information C) Mixed only by a certified chemist D) Used only outdoors Answer: B Explanation: Hazard communication mandates proper labeling of all hazardous chemicals. Question 67. Which of the following is the correct minimum spacing for vertical reinforcement in a stucco control joint? A) 12 inches on center B) 24 inches on center C) 36 inches on center D) 48 inches on center Answer: B
