Question 1: Describe the key properties that make aluminium a popular choice for aircraft construction. Explain why these properties are important for this application.

Answer: Aluminium is lightweight, corrosion-resistant, has good strength-to-weight ratio, and is easy to work with. These properties are important for aircraft as they improve fuel efficiency, durability, and ease of manufacturing.

Question 2: Identify two metals that are commonly used in the construction of kitchen utensils and explain the reasons for their use.

Answer: Stainless steel and aluminium are commonly used. Stainless steel is corrosion-resistant, durable, and has a good finish, making it ideal for utensils. Aluminium is lightweight, conducts heat well, and is easy to clean.

Question 3: A company wants to produce a decorative door handle that is both durable and visually appealing. Which metal would you recommend and why?

Answer: Brass would be suitable because it is durable, corrosion-resistant, and has an attractive gold-like appearance, making it both functional and decorative.

Question 4: Draw a simple sketch of a metallic component that could be used as a hinge in a door. Label the main parts of your hinge.

Answer: A correct sketch should show two flat plates (leaves) joined by a cylindrical pin. The labels should identify the 'leaves', 'pin', and 'pivot point'. The sketch should be proportionate and clear.

Question 5: Design a small metal bracket for supporting a shelf. Your design should include a plan view and side view, showing how it will be fixed to the wall and the shelf.

Answer: A plan view should show the shape of the bracket with holes for screws. The side view should show the angle of the bracket and the mounting points. Both views should be neatly drawn with dimensions if required.

Question 6: Explain the differences between ferrous and non-ferrous metals, providing two examples of each and their typical uses.

Answer: Ferrous metals contain iron and are magnetic; examples include mild steel (used in construction) and cast iron (used in cookware). Non-ferrous metals do not contain iron; examples are aluminium (used in packaging and aeronautics) and copper (used in electrical wiring).

Question 7: A designer is creating a sculpture using recycled metals. Which metal types might be suitable for outdoor display, and what considerations should be taken into account?

Answer: Stainless steel and weathered copper are suitable for outdoor display due to their corrosion resistance. Considerations include ensuring the metal is resistant to rust, and the design should account for expansion or contraction due to weather changes.

Question 8: Sketch a cross-sectional view of a metal wire used in electrical wiring. Indicate the core material and the insulation layer.

Answer: A correct sketch should show a central conductor (copper or aluminium) surrounded by an insulating layer (such as PVC). The sketch should be clear with labels for 'core metal' and 'insulation'.

Question 9: Propose a metal material for manufacturing a set of cutlery intended for everyday use. Justify your choice based on properties such as safety, durability, and appearance.

Answer: Stainless steel is ideal because it is non-reactive, corrosion-resistant, durable, and has an attractive finish suitable for daily use.

Question 10: Identify a metal that is often used in electrical components due to its excellent conductivity. Describe a typical application where this metal is used.

Answer: Copper is used because of its high electrical conductivity. It is commonly used in electrical wiring and circuit boards.