Question 1: Define the term 'material properties' and explain why they are important in product design.

Answer: Material properties are characteristics that describe how a material behaves, such as strength, flexibility, hardness, and durability. They are important because they determine whether a material is suitable for a specific product or function.

Question 2: List three factors a designer should consider when selecting a material for a portable outdoor chair.

Answer: Factors include strength and weight (for portability), weather resistance (to withstand outdoor conditions), and comfort (such as cushioning or surface texture).

Question 3: Describe the main differences between metals and plastics in terms of their properties and typical uses.

Answer: Metals are generally strong, durable, and good conductors of heat and electricity, used in structures and hardware. Plastics are lightweight, flexible, and corrosion-resistant, often used in consumer goods, packaging, and lightweight components.

Question 4: A designer needs to create a lightweight, flexible, and environmentally friendly storage container. Which material might they choose and why?

Answer: They might choose biodegradable plastics or recycled plastics because they are lightweight, flexible, and environmentally friendly.

Question 5: Sketch a simple design for a handle made from a material suitable for a frying pan. Include annotations about the material choice and why it is appropriate.

Answer: A sketch of a handle with a curved shape for grip, made from a heat-resistant and insulating plastic or rubber. Annotations should mention properties like heat resistance, insulation, and durability.

Question 6: Draw a plan for a small, decorative jewelry box that uses a transparent material for the lid. Label the materials used for the body and lid.

Answer: A rectangular box with a transparent cover (possibly acrylic or glass) for the lid, and a contrasting material such as wood or metal for the body. Labels should specify these materials and their properties.

Question 7: Explain why choosing the right material is critical when designing a bicycle frame. Consider factors such as safety, weight, and durability.

Answer: The material affects the safety, weight, and durability of the bicycle. A lightweight yet strong material like aluminum or carbon fiber improves performance, while durable materials ensure safety over time.

Question 8: Design Brief: You are asked to create a durable, lightweight backpack suitable for hiking. List at least three materials you might consider and justify your choices.

Answer: Possible materials include ripstop nylon or polyester for durability and lightweight, foam padding for comfort, and waterproof coatings for weather resistance.

Question 9: Identify a common material used for making kitchen utensils that must withstand high temperatures. Describe its key properties.

Answer: Stainless steel is commonly used because it is heat-resistant, durable, corrosion-resistant, and easy to clean.

Question 10: Sketch a conceptual design for a reusable coffee cup, indicating the materials used for the outer shell, insulation, and lid. Include labels and brief explanations.

Answer: A sketch of a cup with an outer shell made from BPA-free plastic or silicone, an insulating layer such as foam or double-walled stainless steel, and a lid made from plastic or silicone. Labels should specify each material and their thermal or safety properties.