Study Notes
Metals have various uses based on their properties, such as strength, density, and resistance to corrosion.
- Aluminium — a lightweight and strong metal used in aircraft and food containers. Example: Aircraft parts and food containers.
- Zinc — used for galvanizing and making brass. Example: Galvanizing steel and brass production.
- Mild Steel — tough and ductile, used in car bodies and machinery. Example: Car bodies and machinery.
- Stainless Steel — resistant to corrosion, used in cutlery and chemical plants. Example: Cutlery and chemical plants.
Exam Tips
Key Definitions to Remember
- Aluminium: A lightweight metal used in aircraft and food containers.
- Zinc: A metal used for galvanizing and making brass.
- Mild Steel: A tough and ductile metal used in car bodies and machinery.
- Stainless Steel: A corrosion-resistant metal used in cutlery and chemical plants.
Common Confusions
- Confusing aluminium's low density with its resistance to corrosion.
- Mixing up the uses of mild steel and stainless steel.
Typical Exam Questions
- What is aluminium used for in aircraft? Its strength and low density make it ideal for aircraft parts.
- Why is zinc used in galvanizing? Zinc is oxidized instead of iron, protecting it from rust.
- What are the uses of stainless steel? It is used in cutlery and chemical plants due to its corrosion resistance.
What Examiners Usually Test
- The specific properties of metals that make them suitable for certain uses.
- The differences between mild steel and stainless steel in terms of properties and applications.