WJEC Eduqas 1/2 Engineering Unit 3: Solving Engineering Problems

Which of the following is most likely to corrode?

• A non-ferrous metal

• A ferrous metal

One example of a ferrous metal is...

• Brass

• Zinc

• Copper

• Cast Iron

Which metal is best used for wiring?

• Steel

• Copper

• Zinc

Forging uses...

• Heat

• Cold

When casting metals you would use a two-part mould?

• True

• False

Which materials can be formed using extrusion?

• Plastics

• Metals

• Both

Thermoplastics can be recycled.

• True

• False

What are the properties of nylon?

• Creamy colour, tough, fairly hard, resists wear, self-lubricating, good resistance to chemicals and machines

• Stiff, hard but scratches easily, durable, brittle in small sections, good electrical insulator, machines and polishes well

• Strong, flexible, impact resistant

• Tough, good resistance to chemicals, flexible, fairly soft, good electrical insulator

Which is NOT a thermoset plastic?

• Epoxy resin

• Melamine formaldehyde

• Polyester resin

• Acrylic

Smart materials have properties that react to changes in their environment. Their properties can be changed by temperature, light, pressure or electricity.

• True

• False