UUS Practice Tests⌕ Search
Contractor Licensing · 1.6

Louisiana Contractor Lathing, Plastering, and Stuccoing Trade Examination Practice Test

The Louisiana Contractor Lathing, Plastering, and Stuccoing Trade Examination practice covers plaster and stucco installation decisions, from preparing substrates and coordinating wall openings to applying coats and protecting finished work. The question bank samples field concerns such as curing cement-based plaster in hot, dry, windy, or cold conditions, selecting finish-coat timing, and managing appearance across a completed surface.

Exam overview

Exam providerLouisiana State Licensing Board for Contractors
Exam code1.6
CategoryContractor Licensing

About the Louisiana Contractor Lathing, Plastering, and Stuccoing Trade Exam… Exam

Lathing and plastering work calls for assessing substrate readiness, supporting reliable adhesion, and coordinating layers that control moisture and finish appearance. Stucco details include integrating flashing at window openings with the water-resistive barrier and using a weep screed to provide drainage at the wall base. Application decisions also depend on weather and the condition of preceding coats: crews must limit rapid moisture loss or cold exposure and judge when a base coat can receive a finish coat. Other practical concerns include shielding adjacent surfaces and recessed electrical boxes, preparing representative sample panels, and controlling color variation through consistent materials and application practices. These topics connect installation technique with durability, drainage, cleanliness, and the specified appearance of the finished assembly.

Sample Practice Questions

Review a selection from this exam's published US Practice Tests practice bank.

Question 1

During hot, dry, or windy weather, what is an appropriate concern when curing a cement-based plaster coat?

  1. ARapid moisture loss can interfere with proper curing
  2. BThe coat will become stronger if it dries as quickly as possible
  3. CThe lath will automatically expand to compensate
  4. DCuring can be skipped if the surface looks firm
Show answerCorrect answer: A

Rapid evaporation can cause cement-based materials to dry too quickly, increasing the risk of poor curing and surface problems. Appropriate protection and curing methods should follow product and project requirements.

Question 2

When applying a finish coat over a base coat, what should guide the timing of the application?

  1. AThe specified system requirements and the base coat's condition, including whether it is ready to receive the finish coat.
  2. BA fixed waiting period chosen without regard to site or product conditions.
  3. CThe color of the lath behind the base coat.
  4. DWhether the finish coat can be applied before the base coat begins to set, regardless of instructions.
Show answerCorrect answer: A

Coat sequencing and timing depend on the plaster system, product instructions, and the condition of the underlying coat. Following those requirements supports compatibility and reduces the risk of poor bond or finish defects.

Question 3

What is the main reason a plasterer should protect adjacent finished surfaces during application and cleanup?

  1. ATo prevent splatter, staining, and damage that may be difficult to remove
  2. BTo make the plaster cure more quickly
  3. CTo increase the strength of the plaster coat
  4. DTo prevent the wall from needing a finish coat
Show answerCorrect answer: A

Masking or otherwise protecting nearby finishes reduces cleanup damage and material contamination. It does not change plaster curing or eliminate specified coats.

Question 4

At a window opening in a stucco wall, why should flashing details be coordinated with the water-resistive barrier?

  1. ATo direct water that reaches the opening back to the exterior rather than into the wall assembly.
  2. BTo prevent the stucco from expanding in warm weather.
  3. CTo eliminate the need for a sealant joint at every window.
  4. DTo provide a bonding surface for the finish coat.
Show answerCorrect answer: A

Properly integrated flashing directs water outward at openings and helps maintain continuity of the wall's drainage system. Flashing and the water-resistive barrier should be arranged in a shingle-like sequence so water is not trapped behind the cladding.

Question 5

A crew is applying plaster in a room with cold conditions. What is the most appropriate general precaution?

  1. AAllow the materials and work area to remain cold so the plaster sets slowly
  2. BMaintain suitable temperatures for application and curing as required by the product instructions
  3. CAdd extra water to compensate for slow setting
  4. DDirect intense heat onto the fresh plaster surface
Show answerCorrect answer: B

Low temperatures can impair setting and curing of plaster. Follow the product requirements and maintain appropriate conditions for the materials, substrate, and work area; avoid rapid, localized heating that can damage the fresh work.

Question 6

When plastering an interior wall, why should electrical boxes and other recessed openings be protected during application?

  1. ATo keep plaster from obstructing the opening or interfering with later installation and inspection
  2. BTo make the plaster cure faster around the opening
  3. CTo increase the depth of the electrical box
  4. DTo eliminate the need for the required box cover
Show answerCorrect answer: A

Protecting openings keeps plaster out of electrical boxes and preserves access for devices, covers, and inspection. Work should also maintain required clearances and comply with applicable electrical requirements.

Question 7

A crew is preparing a plaster sample panel to confirm an approved finish appearance. What should the panel represent?

  1. AThe intended materials, application method, and finish technique as closely as practical
  2. BOnly the color of the dry material in its bag
  3. CA different substrate and finish method from the project
  4. DA surface made with leftover material of unknown age
Show answerCorrect answer: A

A representative sample panel gives the project team a useful reference for appearance and workmanship. Using the intended system and method makes the approval more meaningful.

How to use this practice test

The free practice bank contains 50 questions, with up to 20 random questions in a session. Answer questions on plaster and stucco field conditions, then use the displayed results to identify which decisions—such as moisture management, coat timing, or opening details—need more review.

Preparation tips

  • Compare hot, dry, windy, and cold conditions; identify how each can affect moisture retention, curing, and protection of cement-based plaster.
  • Trace the water-management path at a stucco window opening, including how flashing relates to the water-resistive barrier.
  • Review the purposes of base coats, finish coats, and weep screeds, and assess what site or material conditions affect application timing and drainage.
  • For appearance-control scenarios, consider how representative sample panels, consistent application, and protection of adjacent surfaces support the specified finish.
Official sourceOfficial exam page ↗