Unit 26 - Diagnostic Assessment

What are the main types of non-metallic materials?

• Silicon, carbon, iron, copper

• Metals, alloys, wood, rubber

• Polymers, ceramics, glass, composites

• Concrete, asphalt, foam, paper

Name two properties of plastics.

• Heavy and brittle

• Lightweight and moisture-resistant.

• Conductive and opaque

• Flammable and porous

What is one common use of ceramics?

• Pottery items such as dishes and vases.

• Building materials like bricks and tiles.

• Glass items such as windows and bottles.

• Electrical insulators for wiring.

How are composite materials used in construction?

• Composite materials are only used in aerospace applications.

• Composite materials are used in construction to create strong, lightweight, and durable components that enhance structural performance.

• Composite materials are primarily used for insulation purposes.

• Composite materials are not suitable for structural components.

List one advantage of using non-metallic materials.

• Lightweight nature, reducing overall weight in applications.

• Increased durability, making them less prone to wear.

• Higher cost compared to metallic materials.

• High thermal conductivity, leading to heat retention.

What is a characteristic of thermoplastics?

• They dissolve in water easily.

• They are rigid and cannot be reshaped.

• They can only be shaped once.

• They can be melted and reshaped multiple times.

Give an example of a ceramic material.

• Glass

• Porcelain

• Metal

• Wood

What is the difference between composites and traditional materials?

• Composites are made from multiple materials for enhanced properties, while traditional materials are usually homogeneous.

• Composites are always stronger than traditional materials.

• Traditional materials are made from multiple components.

• Composites are less expensive than traditional materials.

Why are plastics often chosen for packaging?

• Plastics are chosen for packaging due to their lightweight, durability, moisture resistance, versatility, and cost-effectiveness.

• Plastics are heavy and difficult to transport.

• Plastics are the most expensive material for packaging.

• Plastics are biodegradable and environmentally friendly.

What property makes ceramics suitable for high-temperature applications?

• High electrical conductivity.

• Corrosion resistance and ductility.

• High melting point and thermal stability.

• Low density and flexibility.