Free Red Seal Drywall Finisher and Plasterer Examination Practice Questions

Sample Practice Questions

Try these 10 sample questions from the Red Seal Drywall Finisher and Plasterer Examination practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1A drywall finisher reads the WHMIS label of a compound classified as a Category 1 respiratory sensitizer. Which pictogram is assigned to that hazard class?

   1. A.Flame
   2. B.Health hazardCorrect answer: B
   3. C.Corrosion
   4. D.Skull and crossbones

   Explanation: CCOHS states that "The health hazard pictogram is used for the following classes and categories:" and lists "Respiratory or skin sensitization – Respiratory sensitizer (Category 1, 1A and 1B)". The label therefore uses the health hazard pictogram for this classification.

   Reference: CCOHS WHMIS - Pictograms — What pictograms are used with WHMIS hazard classes and categories?

2. 2A finisher applies drying-type joint filler in successive coats to bring a taped seam level. What change in the filler explains why depressions can remain after an earlier coat dries?

   1. A.Shrinkage of the fillerCorrect answer: A
   2. B.Blistering of the filler
   3. C.Discolouration of the filler
   4. D.Cracking of the filler

   Explanation: The BC training material explains that "The drying of the compound causes it to shrink" and that further filler fills the depressions. Shrinkage therefore explains this particular loss of level.

   Reference: BC Carpenter Apprenticeship Program: Install Interior Finishes — Learning Task 3, Filling Compound, printed page 33

3. 3Before texturing very rough masonry, a finisher needs a thick liquid that smooths and prepares the surface. Which material serves that purpose?

   1. A.Block fillerCorrect answer: A
   2. B.Stain-blocking primer
   3. C.Drywall primer
   4. D.Concrete bonding agent

   Explanation: The National Occupational Analysis defines block filler as "a thick liquid used to smooth out and prepare very rough masonry surfaces". The other materials serve different priming or bonding purposes.

   Reference: Drywall Finisher and Plasterer National Occupational Analysis — Appendix B, Glossary, block filler, printed page 50

4. 4A plasterer creates a rough key in a base coat before applying the finish coat. What is the key's principal purpose?

   1. A.To give the finish coat a surface to gripCorrect answer: A
   2. B.To give the finish coat a uniform colour
   3. C.To give the finish coat a polished texture
   4. D.To give the finish coat a moisture barrier

   Explanation: Parks Canada describes a key as "a roughened surface for the third (and final) coat to adhere to — preventing delamination". The same adhesion principle explains the keyed base coat before the finish is applied.

   Reference: Parks Canada: Province House Conservation — Plasterwork, scratch coat, brown coat and finish coat

5. 5A plasterer is finishing an installed decorative moulding and must pick out a small angle in its profile. Which traditional plastering tool is specifically used for this detail?

   1. A.Jointing and mitring toolCorrect answer: A
   2. B.Angle float
   3. C.Padded float
   4. D.Two-handled float

   Explanation: The National Park Service identifies "jointing and mitering tools to pick out angles in decorative moldings". It identifies the angle float with applying finish to inside angles, the padded float with levelling humps and hollows, and the two-handled float with floating larger surfaces.

   Reference: National Park Service: Repairing Historic Flat Plaster Walls and Ceilings — Traditional plastering tools illustration caption, printed page 2

6. 6After a paper-taped wallboard joint dries, narrow cracks appear along the edges of the tape. Which compound-selection error does the Drywall Finishing Council identify as a possible cause?

   1. A.Topping compound used for embeddingCorrect answer: A
   2. B.Taping compound used for embedding
   3. C.All-purpose compound used for embedding
   4. D.Setting compound used for embedding

   Explanation: The council identifies "use of wrong compound (topping instead of taping)" among the possible causes of edge cracking. National Gypsum describes all-purpose compound as suitable for "taping and filling" and paper tape as suitable for use with ready mix or setting-type compounds.

   Reference: Drywall Finishing Council Gypsum Construction Troubleshooting Guide: Joint Treatment — 3.2 Edge Cracking, Cause A

7. 7A finishing crew has assessed a task that produces oil-containing particulate, and a particulate filter will be used for more than one shift. The manufacturer has confirmed its service life and the required protection is otherwise met. Which filter series is suitable for this duration?

   1. A.N95
   2. B.P95Correct answer: B
   3. C.R95
   4. D.N100

   Explanation: CCOHS says "P series (Strongly resistant to oil) - May be used in any atmosphere, including those with oil particulates, for more than one shift." It limits R-series use with oil particulates to one shift and says N-series filters are not resistant to oil. The confirmed service life addresses the manufacturer’s limit.

   Reference: CCOHS Respirators - Respirator Selection — What are the different classes of respirators?

8. 8While preparing wallboard for taping, a finisher checks the screw heads. Which condition is appropriate for a correctly set drywall screw?

   1. A.Slightly below the face, with the paper intactCorrect answer: A
   2. B.Slightly below the face, with the paper torn
   3. C.Flush with the face, with the paper intact
   4. D.Above the face, with the paper intact

   Explanation: The BC trade material says the screw gun sets screws "slightly below the surface of the wallboard" and that "Screws must not rip through the paper surface of the drywall board". The acceptable position combines those two conditions.

   Reference: BC Carpenter Apprenticeship Program: Install Interior Finishes — Learning Task 4, Fasteners

9. 9After spraying a textured coating, a finisher flattens the tops of the texture while leaving a patterned surface. What is this texturing technique called?

   1. A.Orange peel
   2. B.Knock-downCorrect answer: B
   3. C.Swirl texturing
   4. D.Skip-trowelling

   Explanation: The occupational analysis defines knock-down as "a technique used to flatten the top of textured finishes for a unique look". Orange peel, swirl texturing, and skip-trowelling are different texture names or techniques.

   Reference: Drywall Finisher and Plasterer National Occupational Analysis — Appendix B, Glossary, knock-down, printed page 51

10. 10A plasterer is choosing among decorative Venetian-style finishes. Under the Wall and Ceiling Contractors Association guidance, which base material is recommended for interior application only?

    1. A.Gypsum-based plasterCorrect answer: A
    2. B.Lime-based plaster
    3. C.Acrylic-based plaster
    4. D.Cement-based plaster

    Explanation: The association says of gypsum Venetian plaster, "This type of Venetian plaster is recommended for interior application only." It describes natural lime as usable indoors and outdoors and notes acrylic formulations for exterior use. A trade practitioner also describes cement-based decorative plaster as suitable where weather is a factor.

    Reference: Wall and Ceiling Contractors Association: Venetian Plaster — Gypsum-based, page 1