Question 1: Describe three common properties of metals that make them suitable for use in construction and manufacturing.

Answer: Metals are typically strong, durable, and good conductors of heat and electricity. They are also malleable and ductile, allowing them to be shaped without breaking.

Question 2: Identify two advantages and two disadvantages of using aluminium as a material in product design.

Answer: Advantages: Lightweight and corrosion-resistant. Disadvantages: Less strong than some steels and can be more expensive.

Question 3: A company needs to produce a lightweight, corrosion-resistant bicycle frame. Which metal would you recommend and why?

Answer: Recommended metal: Aluminium, because it is lightweight and resistant to corrosion, making it ideal for bicycle frames.

Question 4: Sketch a simple cross-section of a steel wire, clearly indicating the core and the surface coating if present.

Answer: A correct sketch would show a cylindrical wire with a uniform cross-section, possibly indicating a core of steel with a surface layer of galvanization or coating.

Question 5: Explain the process of galvanization and why it is used on steel products.

Answer: Galvanization involves coating steel with a layer of zinc to prevent rust and corrosion. It extends the lifespan of steel products exposed to weather or moisture.

Question 6: Design a small household item, such as a utensil or tool, that requires a metal with high malleability. Sketch your design and label the key features.

Answer: A sketch of a utensil, like a spoon or a flat-head screwdriver, showing a handle and a working part, with labels indicating the malleable metal used (e.g., copper or aluminium).

Question 7: List three safety precautions to consider when working with hot metals in a workshop.

Answer: Wear appropriate personal protective equipment (gloves, goggles), ensure proper ventilation, and handle hot metals with tongs or tools designed for high temperatures.

Question 8: Identify a metal that is commonly recycled and explain why recycling is important for this material.

Answer: Aluminium is commonly recycled because it saves energy, reduces environmental impact, and conserves natural resources.

Question 9: Sketch a plan for a small metal box, including the main parts and joints. Label the materials and types of joints used.

Answer: A plan would include views of the box showing sides, lid, and joints such as welding or riveting, with labels indicating the metal type and joint methods.

Question 10: Explain the difference between ferrous and non-ferrous metals, providing one example of each.

Answer: Ferrous metals contain iron and are usually magnetic, such as steel. Non-ferrous metals do not contain iron and are non-magnetic, such as aluminium.