Classify metals as ferrous or non-ferrous and explain two properties of aluminium for engine components.

Here is the solution to question 8:

8. a) Classify the following as ferrous or non-ferrous metals: steel, aluminium, copper, cast iron.

• Ferrous metals are those that contain iron.

• Non-ferrous metals are those that do not contain iron.

• Steel: Ferrous (an alloy of iron and carbon).

• Aluminium: Non-ferrous (a pure metal, no iron).

• Copper: Non-ferrous (a pure metal, no iron).

• Cast iron: Ferrous (an alloy of iron, carbon, and silicon).

8. b) Explain two properties that make aluminium suitable for engine components.

• Lightweight: Aluminium has a low density, making it significantly lighter than steel. This reduces the overall weight of the engine and vehicle, leading to improved fuel efficiency and better performance.
• Good Thermal Conductivity: Aluminium is an excellent conductor of heat. This property allows engine components made from aluminium to dissipate heat efficiently, preventing overheating and maintaining optimal operating temperatures.