__ metals contain iron as their primary component, while __ metals do not contain iron as a major constituent.

• Ferrous, Non-ferrous

• Non-ferrous, Ferrous

• Pure, Alloy

• Alloy, Pure

An __ is a mixture of two or more metallic elements, often created to enhance specific properties such as strength or corrosion resistance.

• Alloy

• Composite

• Polymer

• Pure metal

Which of the following is an example of a thermosetting polymer?

• Epoxy resin

• Polyethylene

• Polypropylene

• Nylon

What are polymers primarily composed of?

• Long-chain molecules

• Metallic elements

• Pure elements

• Short-chain molecules

What is a common use of alloys?

• Enhancing strength

• Reducing weight

• Increasing brittleness

• Decreasing flexibility

Which of the following is a disadvantage of using metals in construction?

• High strength

• Poor malleability

• Poor malleability

• High ductility

Which type of composite material consists of a polymer matrix reinforced with glass fibres?

• Carbon fibre-reinforced polymer

• Metal matrix composite

• Ceramic matrix composite

• Fiberglass

Which of the following is a characteristic of non-ferrous metals?

• They always contain iron

• They are generally more resistant to corrosion than ferrous metals

• They have lower electrical conductivity than ferrous metals

• They are always magnetic

Which type of polymer forms irreversible chemical bonds when cured?

• Thermoplastic

• Thermosetting

• Composite

• Alloy

What is a common application of composite materials?

• Food packaging

• Aerospace components

• Textile manufacturing

• Paper production