Red Seal Painter and Decorator preparing and applying paints and coatings practice questions.

Five free practice questions on preparing and applying paints and coatings: block C of the Red Seal 404C Painter and Decorator exam, about 31 of its 130 questions. They are in the exam's format: four options, one correct answer. Answer each one before opening the explanation. No account, no email.

01The questions

1. Procedural · Applies residential, institutional and commercial paints and coatings with rollers

   Flush slab doors in a clinic are being refinished in a semi-gloss enamel. The painter wants the speed of a roller without leaving roller stipple. Which method gives this?

   1. Roll it on with a long-nap sleeve to level it.
   2. Roll it on, then lay it off lightly with a brush.
   3. Brush it on, then back roll it with a dry sleeve.
   4. Roll it on, then roll again once it is tacky.
   Show the answer

   B. Correct. Rolling puts the enamel on quickly and evenly; tipping off, with light brush strokes in one direction while it is wet, removes the roller stipple and leaves a level, brushed finish.

   Why not the others

   A. A long nap carries more paint and leaves a heavier stipple, the opposite of what a smooth door needs.

   C. Rolling over a brushed coat puts roller stipple back on the surface instead of removing it; the brush is the finishing tool, used after the roller.

   D. Rerolling a tacky enamel tears the film and leaves a rough, stippled surface; any finishing pass is made while the enamel is wet.

   Source: Red Seal Occupational Standard, sub-task C-12.02

2. Procedural · Prepares residential, institutional and commercial paints and coatings

   Half a 3.78 L (1 US gal) can of moisture-cured urethane is left at the end of the day on a retail store floor job. What is done with the unused coating?

   1. Stir in a little water to keep it from thickening.
   2. Leave the lid loose so the solvent can vent overnight.
   3. Pour it into an open pail for easier mixing tomorrow.
   4. Seal the can tightly right away to keep humid air out.
   Show the answer

   D. Correct. A moisture-cured urethane cures by reacting with moisture in the air, so humid air left in a part-full can starts the cure inside it and a skin or gel forms. Resealing the can tightly at once keeps the rest usable.

   Why not the others

   A. Moisture is what cures this coating. Water stirred in would start the reaction in the can, which can also gas and foam, ruining what is left.

   B. A loose lid lets humid air into the can, and that moisture starts curing the coating into a skin or gel overnight. The can is closed airtight.

   C. An open pail exposes the coating to the air and its moisture all night, so it would skin or gel. Leftovers stay in their own can with the lid sealed.

   Source: Red Seal Occupational Standard, sub-task C-11.01

3. Procedural · Applies stencils and graphics

   A border stencil will be used in 40 hotel rooms and cleaned after each room. Which stencil material suits the job?

   1. Polyester film.
   2. Paper.
   3. Bristol board.
   4. Heavy cardboard.
   Show the answer

   A. Correct. Polyester film is durable, flexible enough to lie flat on a wall, washable after each use and see-through, which makes it easy to line each repeat up with the last. It keeps a crisp cut edge through many uses.

   Why not the others

   B. A paper stencil absorbs paint and moisture, softens, and its edges break down after a few uses. It suits a one-off design, not 40 rooms.

   C. Bristol board is useful for drawing and trying out a design, but as a stencil it soaks up paint, warps when cleaned and its cut edges wear quickly.

   D. Cardboard is stiff and absorbent: it will not follow the wall closely, it swells when cleaned, and its edges fray, so the image gets ragged.

   Source: Red Seal Occupational Standard, sub-task C-13.04

4. Procedural · Applies residential, institutional and commercial paints and coatings with spray equipment

   Wood door casings and baseboards in an occupied office are to be sprayed in place with a waterborne enamel, and overspray must be kept to a minimum. Which spray equipment suits this best?

   1. HVLP spray.
   2. Conventional air spray.
   3. Airless spray.
   4. Electrostatic spray.
   Show the answer

   A. Correct. HVLP atomizes with a high volume of air at low pressure, so less paint bounces back and more lands on the work; it gives a fine finish on trim with far less overspray than conventional spray.

   Why not the others

   B. Conventional spray gives a fine finish but has the lowest transfer efficiency of the four, putting the most paint into the air as overspray.

   C. Airless is built for output on large areas; at the pressure it needs to atomize an enamel it sends more overspray into an occupied space than HVLP and is harder to control on narrow trim.

   D. Electrostatic spraying relies on a grounded, conductive object to attract the charged paint; wood trim is not that kind of substrate.

   Source: Red Seal Occupational Standard, sub-task C-12.04; CCOHS

5. Procedural · Installs residential, institutional and commercial reinforcing mesh

   While synthetic-fibre mesh is being embedded in a reinforced coating on a school's concrete stair landing, the painter sees air bubbles and lifted spots under the mesh. What is done?

   1. Pour extra coating over the bubbles to bury them under a thick layer.
   2. Lay a second layer of mesh over the bubbles before the coat sets.
   3. Work the mesh into the wet coat, pushing the trapped air out.
   4. Let the coat set, then cut out the bubbles and patch them afterwards.
   Show the answer

   C. Correct. Bubbles and voids are failures that weaken the system and let water track under it. While the coat is wet, the mesh is smoothed down with a brush or roller, working the air out toward the edges, so it is saturated and in full contact with the substrate.

   Why not the others

   A. Extra coating over a bubble hides it without removing the air; the void stays under the mesh and can blister or crack later. The mesh has to be worked into contact while the coat is wet.

   B. A second layer over trapped air buries the void instead of removing it and adds another layer that can trap more air. The first layer is worked down first.

   D. Waiting until the coat sets locks the voids in, and cutting and patching leaves weak spots and seams. The air is worked out while the coating is still wet.

   Source: Red Seal Occupational Standard, sub-task C-11.02

02Answer key

03What block C covers

Architectural coatings from the can to the wall: binders, driers and solvents, choosing the product for the substrate and the occupants, tinting and boxing, thinning to the data sheet, embedding reinforcing mesh, applying by brush, roller, applicator and conventional, HVLP and airless spray, keeping a wet edge, checking film build, estimating material, and decorative and specialty finishes such as sponging, faux, stencils, textures and multi-spec coatings.

The Red Seal Occupational Standard names this block “Prepares and applies residential, institutional and commercial paints, coatings and finishes”. It carries 23.8% of the exam, about 31 of the 130 questions, split across three tasks. The share column is each task's weight within the block, as the standard publishes it.

04What the questions turn on

Box the pails before you start

Pails tinted on different days can differ slightly, and the difference shows as a shade change partway across a wall. Pouring them together until colour and viscosity are uniform removes it.

Always work back into wet paint

Brushing from bare surface back into the finished part, and rolling a long wall in full-height sections into the last one, keeps every join wet so no lap marks form.

Film build is arithmetic

One US gallon spread 1 mil thick covers 1,604 sq. ft, so the spread rate gives the wet film that went on. Square metres per litre gives how much goes on each marked square of a floor.

Balance the spray gun, then reach the work

Coarse, spitting atomization on a conventional gun means more fluid than the air can break up, so fluid comes down and atomizing air goes up. A high wall is reached with a gun extension that keeps the tip square and at the normal distance.

05The other blocks

The 404C exam has six blocks. Each has its own page of free questions:

The 404C Painter and Decorator practice exam page describes the full question bank. How these questions are written and checked: how our questions are made. Found a mistake? Tell us and we will fix it.