Question 1: Explain the purpose of finishing processes in product design. Why are they important for both aesthetics and durability?

Answer: Finishing processes improve the appearance of a product, making it more attractive, and protect it from damage, corrosion, or wear, thus increasing its lifespan and quality.

Question 2: Describe the steps you would take to prepare a wooden surface for painting, including any sanding techniques involved.

Answer: First, sand the surface with a medium-grit sandpaper to smooth out irregularities. Then, use a finer grit to achieve a smooth finish. Finally, wipe off dust with a damp cloth before applying paint.

Question 3: Sketch a diagram showing the process of applying a clear lacquer to a wooden item. Label each stage clearly.

Answer: A correct sketch would show: 1) The wooden surface being prepared and cleaned, 2) Applying the lacquer evenly with a brush or spray, 3) The lacquer drying and curing, 4) The finished glossy surface.

Question 4: Design a plan for finishing a metal product that will be used outdoors. Include steps to prevent rust and corrosion.

Answer: Clean the metal thoroughly, then apply a rust-resistant primer or paint. Consider galvanizing or electroplating if appropriate. Finish with a clear protective coating or sealant suitable for outdoor use.

Question 5: Describe the process of polishing a plastic surface to achieve a glossy finish. Include tools and safety precautions.

Answer: Use a fine abrasive or polishing compound on a soft cloth or buffing wheel to smooth the surface. Wear safety goggles and a dust mask to protect from debris and fumes. Finish with a clean, dry cloth to enhance gloss.

Question 6: Sketch a design for a handle that incorporates an anti-slip finish. Label the materials and finishing techniques you would use.

Answer: A correct sketch would show a handle with textured or rubberized grip areas, labeled with materials like rubber or textured plastic, and notes on applying a rubberized coating or textured surface for anti-slip properties.

Question 7: Explain the difference between matte and gloss finishes. Provide examples of products where each finish might be appropriate.

Answer: Matte finishes are dull with no shine, suitable for hiding imperfections, common on wall paints or phone cases. Gloss finishes are shiny, reflective, and ideal for furniture or decorative items to enhance appearance.

Question 8: Describe how you would evaluate the quality of a painted surface after finishing. What key aspects would you inspect?

Answer: Inspect for an even coating without drips or runs, check the surface for smoothness and uniform color, ensure there are no bubbles or dust particles trapped, and verify that the finish is durable and adheres well.

Question 9: Sketch a cross-section of a product showing the layering of a protective finish over a base material. Label each layer.

Answer: A correct sketch would show the core material (wood, metal, plastic), then an undercoat or primer layer, followed by the main finishing coat, and finally a clear protective topcoat or sealant.

Question 10: Discuss the environmental considerations when choosing finishing materials and techniques. How can designers minimize environmental impact?

Answer: Choose environmentally friendly finishes like water-based paints or natural oils, avoid harmful solvents, reduce waste, and ensure proper disposal of chemicals. Opt for finishes with low VOC content to reduce air pollution.