Metals and Alloys

When selecting materials for constructing a bridge, what is the main difference to consider between ferrous and non-ferrous metals?

• Non-ferrous metals cannot be recycled.

• Non-ferrous metals are always magnetic.

• Ferrous metals contain iron, non-ferrous do not.

• Ferrous metals are lighter than non-ferrous metals.

Imagine you're selecting materials for outdoor furniture that needs to withstand various weather conditions without rusting. Which metal would you choose for its ability to resist rust and stains?

• Copper

• Aluminium

• Mild Steel

• Stainless Steel

Which of the following is a property of lead?

• High conductivity

• Soft and heavy

• High tensile strength

• Lightweight

Why is copper commonly used in household electrical wiring?

• Malleability

• Ductility and conductivity

• Brittleness

• Resistance to rust

During a science fair, a group of students presented a project on metals and their compositions. They displayed various samples, including Brass, Lead, Wrought Iron, and Stainless Steel. Which of these samples is not an alloy?

• Brass

• Lead

• Wrought Iron

• Stainless Steel

What is the main use of wrought iron?

• Batteries

• Aircraft

• Ornamental gates and railings

• Cutlery

Imagine you are an engineer tasked with designing a new line of commercial airplanes. Which metal would you primarily choose for the aircraft's structure due to its light weight?

• Lead

• Aluminium

• Copper

• Silver

Why do engineers prefer using tube steel sections over solid steel sections for constructing a bridge?

• Reduced weight

• Better aesthetic appeal

• Increased weight

• Higher cost

A craftsman is working on a new musical instrument and needs a durable yet malleable metal. He decides to create an alloy by mixing copper with another metal to produce brass. Which metal should he mix with copper?

• Zinc

• Nickel

• Chromium

• Iron

Why is mild steel a common choice for manufacturing school furniture?

• Non-conductivity

• Lightweight

• Ability to resist rust

• High tensile strength