Question 1: Explain the purpose of finishing processes in product design. Why are they important for the final product?

Answer: Finishing processes improve the appearance, surface quality, and durability of a product. They are important because they enhance aesthetics, protect against damage, and ensure the product meets quality standards.

Question 2: Describe the steps involved in sanding a wooden surface to achieve a smooth finish. Include tools that could be used at each stage.

Answer: The steps include starting with coarse sandpaper to remove roughness, progressing to finer grits for smoothness, and finishing with very fine grit or polishing. Tools include hand sandpaper, sanding blocks, or electric sanders at different grit levels.

Question 3: Identify two different finishing techniques used for metal products and describe their effects on the surface.

Answer: Electroplating adds a thin metal coating for corrosion resistance and aesthetic appeal. Brushing creates a matte, textured surface that hides fingerprints and scratches.

Question 4: Draw a simple diagram showing the process of applying a clear lacquer to a wooden product. Label the key steps involved.

Answer: A correct diagram would show a wooden item being cleaned, then coated with a spray or brush application of lacquer, followed by drying or curing. Labels should include 'clean surface', 'apply lacquer', and 'drying stage'.

Question 5: Sketch a design for a handle that requires a smooth and comfortable finish. Include considerations for the finishing method you would choose.

Answer: The sketch should depict a handle with ergonomic contours, a smooth surface, and possibly a textured grip area. Considerations include applying a sanding finish for smoothness and a protective coating like varnish or lacquer.

Question 6: A plastic product needs to have a glossy finish. Suggest a finishing method suitable for achieving this and explain why.

Answer: Applying a spray or brush-on clear lacquer or varnish suitable for plastics can produce a glossy finish. These coatings enhance shine and provide surface protection.

Question 7: Explain the difference between polishing and buffing. When would each process be used?

Answer: Polishing involves using abrasive compounds or pads to smooth and shine a surface, often removing minor scratches. Buffing uses a softer wheel or cloth to further enhance shine and smoothness, typically after polishing.

Question 8: Design Brief: You are asked to produce a decorative wooden box with a high-quality finish. Outline the finishing processes you would use from start to finish, including any protective coatings.

Answer: First, sand the wood starting with coarse grit and progressing to fine grit for a smooth surface. Then, apply a stain or paint if desired. Finish with a clear varnish or lacquer to protect and add gloss. Optionally, polish or buff for extra shine.

Question 9: Describe how you would prepare a metal surface before applying a decorative paint or coating. Why is this preparation necessary?

Answer: Clean the surface thoroughly to remove grease, dirt, and rust, then sand or degrease it. Proper preparation ensures good adhesion of the paint or coating and a smooth, durable finish.

Question 10: Sketch a cross-section of a product with a layered finish, including the base material, primer, paint, and topcoat. Label each layer clearly.

Answer: The sketch should show a layered structure: the bottom layer as the base material (e.g., metal or wood), followed by a primer layer, then a layer of paint, and finally a clear topcoat or gloss layer. Labels should clearly identify each layer.