Download Nevada Lathing and Plastering Exam Questions and more Exams Technology in PDF only on Docsity!
Course Exam
Question 1. Which document provides the official dimensions and symbols for interpreting lath and plaster drawings? A) OSHA 1926 B) International Building Code (IBC) C) Architectural Blueprint Legend D) ASTM C 926 Answer: C Explanation: The architectural blueprint legend defines the scales, symbols, and notes used on construction drawings, essential for accurate interpretation. Question 2. In a Nevada residential bid, which cost element is NOT typically included in the direct costs? A) Material purchase B) Labor wages C) Contractor’s profit margin D) Equipment rental Answer: C Explanation: Direct costs cover materials, labor, and equipment; profit margin is part of overhead and profit, not a direct cost.
Course Exam
Question 3. When taking quantity takeoffs for metal lath, the correct measurement is: A) Linear feet of lath per wall length B) Square feet of lath covering the wall area C) Cubic yards of lath material D) Number of lath panels Answer: B Explanation: Metal lath is installed as a sheet covering the wall surface, so takeoffs are based on square footage. Question 4. The typical crew productivity rate for applying a scratch coat on interior walls is: A) 80 sf per man‑hour B) 40 sf per man‑hour C) 20 sf per man‑hour D) 10 sf per man‑hour Answer: B Explanation: Industry standards estimate about 40 sf per man‑hour for a scratch coat when the crew is experienced.
Course Exam
Question 7. Which type of lath is most suitable for curved interior surfaces? A) Expanded metal lath B) Woven wire lath C) Gypsum lath D) Wood lath Answer: C Explanation: Gypsum lath comes in flexible sheets that can conform to curves more easily than metal or wood lath. Question 8. In a three‑coat stucco system, the brown (base) coat is primarily used to: A) Provide the final texture B) Bond the scratch coat to the lath C) Level and strengthen the wall before the finish coat D) Act as a waterproof barrier Answer: C Explanation: The brown coat creates a flat, strong substrate for the final finish coat.
Course Exam
Question 9. Which of the following is a required PPE item when mixing Portland cement plaster? A) Hearing protection B) Chemical‑resistant gloves C) Steel‑toed boots D) High‑visibility vest Answer: B Explanation: Cement is caustic; chemical‑resistant gloves protect the skin from burns. Question 10. The Nevada C‑17 contractor license specifically authorizes work in: A) Electrical installations B) Plumbing and drainage C) Lathing and plastering D) Roofing Answer: C Explanation: The C‑17 classification covers lathing, plastering, and related finishing trades.
Course Exam
Question 13. Which of the following admixtures is commonly added to exterior stucco to improve flexibility? A) Retarder B) Accelerant C) Acrylic polymer D) Calcium chloride Answer: C Explanation: Acrylic polymer admixtures increase flexibility and adhesion, reducing cracking in exterior stucco. Question 14. The correct curing temperature range for Portland cement stucco in Nevada’s desert climate is: A) 30‑ 50 °F B) 50‑ 70 °F C) 70‑ 85 °F D) 85‑ 100 °F Answer: C Explanation: Curing at 70‑ 85 °F promotes proper hydration while avoiding rapid drying that can cause shrinkage cracks.
Course Exam
Question 15. A “scratch coat” is scored with a “rake” primarily to: A) Create a decorative pattern B) Increase surface area for bonding the next coat C) Reduce the coat’s thickness D) Provide fire‑resistance rating Answer: B Explanation: Scoring creates keying grooves that improve mechanical adhesion of the brown coat. Question 16. Which code section addresses the minimum fire‑rating for interior plaster assemblies in Nevada residential construction? A) IRC R302. B) IBC Chapter 7 C) NEC Article 410 D) OSHA 1926. Answer: A Explanation: IRC R302.1 specifies fire‑resistance requirements for interior wall assemblies, including plaster.
Course Exam
Question 19. For exterior EIFS, the drainage plane is created by: A) A waterproof membrane behind the insulation board B) A weep screed at the base of the wall C) Perforated metal lath D) A vapor barrier under the finish coat Answer: B Explanation: A weep screed allows any moisture that penetrates the EIFS to escape, protecting the substrate. Question 20. Which OSHA regulation governs scaffold erection and use on plastering jobs? A) 29 CFR 1910. B) 29 CFR 1926. C) 29 CFR 1910. D) 29 CFR 1926. Answer: B Explanation: 29 CFR 1926.451 outlines requirements for scaffold construction, inspection, and safety.
Course Exam
Question 21. The correct method for attaching metal lath to a wood stud wall is: A) Adhesive only B) 6‑inch nails spaced 4 inches apart C) 8‑inch staples every 12 inches D) Screws with washers at 12‑inch intervals Answer: B Explanation: 6‑inch nails at 4‑inch centers provide secure mechanical fastening without damaging the lath. Question 22. When calculating the linear footage of corner beads for a rectangular room (12 ft × 15 ft) with 8 ft ceiling height, the total length required is: A) 70 ft B) 80 ft C) 100 ft D) 120 ft Answer: C Explanation: Perimeter = 2 × (12 + 15) = 54 ft; multiply by 2 for both vertical edges (8 ft each) = 54 + 2 × 8 = 70 ft. Adding the top edge (ceiling) gives 70 + 30 = 100 ft total.
Course Exam
Question 25. Which Nevada statute outlines the lien filing deadline for contractors on residential projects? A) NRS 111. B) NRS 115. C) NRS 108. D) NRS 617. Answer: C Explanation: NRS 108.130 specifies the time limits for filing mechanics’ liens on residential construction. Question 26. The most appropriate fire‑resistive rating for a 1‑hour fire‑rated interior plaster wall is achieved by: A) Using ¼‑inch gypsum board only B) Applying a ½‑inch plaster over metal lath C) Installing a ¼‑inch plaster over wood lath with a fire‑retardant additive D) Using a ¾‑inch cement plaster with no lath Answer: B Explanation: A ½‑inch plaster over metal lath meets the density and thickness required for a 1‑hour rating per code.
Course Exam
Question 27. When mixing a traditional 3‑part gypsum plaster (neat plaster), the correct water‑to‑powder ratio is approximately: A) 0.2 gal per lb B) 0.4 gal per lb C) 0.6 gal per lb D) 0.8 gal per lb Answer: B Explanation: Neat plaster typically requires about 0.4 gallon of water per pound of powder for workable consistency. Question 28. The purpose of a “scratch coat” in exterior stucco is to: A) Provide the final decorative texture B) Serve as a moisture barrier C) Create a key for the brown coat and improve adhesion to lath D) Reduce the overall wall thickness Answer: C Explanation: The scratch coat is scored to lock the subsequent brown coat and bond firmly to the lath.
Course Exam
Question 31. The correct sequence for installing exterior stucco on a wood‑frame wall is: A) WRB → metal lath → scratch coat → brown coat → finish coat B) Metal lath → WRB → scratch coat → brown coat → finish coat C) WRB → scratch coat → metal lath → brown coat → finish coat D) Metal lath → scratch coat → WRB → brown coat → finish coat Answer: A Explanation: The water‑resistive barrier (WRB) is installed first, followed by lath and the three stucco coats. Question 32. Which of the following is a common cause of “blistering” in exterior stucco? A) Over‑mixing the plaster B) Applying finish coat before the brown coat cures C) Using too much sand in the mix D) Installing lath with excessive overlap Answer: B Explanation: Applying the finish coat before the brown coat has adequately cured traps moisture, leading to blisters.
Course Exam
Question 33. The ASTM standard that specifies requirements for exterior stucco (portland cement‑lime‑sand mix) is: A) ASTM C 90 B) ASTM C 595 C) ASTM C 618 D) ASTM C 150 Answer: B Explanation: ASTM C 595 covers the specifications for ready‑mixed cementitious stucco. Question 34. Which type of corner bead is recommended for high‑traffic interior walls to resist impact? A) Vinyl bead B) Metal “J” bead C) Plastic “L” bead D) Wood trim Answer: B Explanation: Metal “J” beads provide superior durability and impact resistance for high‑traffic areas.
Course Exam
Question 37. Which of the following is a required component of a complete EIFS wall system? A) Vapor barrier behind insulation board B) Reinforcing mesh embedded in the base coat C) Metal lath over the finish coat D) Cement‑based stucco finish Answer: B Explanation: EIFS incorporates a fiberglass mesh within the base coat to provide tensile strength. Question 38. The correct method for storing bulk Portland cement on a job site is: A) In open piles on the ground B) In sealed, moisture‑proof containers off the ground C) Mixed with sand to form a dry pack D) Covered with a tarp but left on the ground Answer: B Explanation: Cement must be kept dry; sealed containers off the ground prevent moisture absorption and contamination.
Course Exam
Question 39. In Nevada, the “one‑coat” stucco system differs from the three‑coat system mainly because: A) It uses a polymer‑modified finish coat that also serves as the base B) It requires no WRB C) It is applied only on interior walls D) It eliminates the need for metal lath Answer: A Explanation: One‑coat systems employ a polymer‑modified finish coat that bonds directly to the substrate, eliminating separate scratch and brown coats. Question 40. Which of the following is the most accurate way to calculate the amount of sand needed for a 1‑inch thick brown coat over 500 sf of wall? A) 0.5 cubic yards B) 0.75 cubic yards C) 1.0 cubic yards D) 1.25 cubic yards Answer: B Explanation: 1 inch ≈ 0.083 ft; volume = 500 sf × 0.083 ft = 41.5 cf ≈ 1.54 cubic yards of mix; sand is about 50 % of the mix, so ≈0.75 cubic yards.
