Exploring Smart and Composite Materials

Which of the following is an example of a smart material?

• Stainless steel

• Shape memory alloy

• Concrete

• Glass

What property makes thermochromic pigments a smart material?

• They conduct electricity

• They change colour with temperature

• They are magnetic

• They are biodegradable

Which of the following is a composite material?

• Aluminium

• Carbon fibre reinforced polymer

• Copper

• Polyethylene

What is the main advantage of using composite materials in aircraft construction?

• They are heavier than metals

• They are more expensive

• They have a high strength-to-weight ratio

• They rust easily

Which smart material is used in glasses that darken in sunlight?

• Photochromic glass

• Kevlar

• MDF

• Stainless steel

What is the main function of piezoelectric materials?

• To conduct heat

• To generate electricity when deformed

• To absorb water

• To insulate against sound

Which of the following is NOT a property of carbon fibre composites?

• Lightweight

• High tensile strength

• Good electrical conductor

• Corrosion resistant

What is the main component of concrete that acts as a binder?

• Sand

• Cement

• Gravel

• Water

Kevlar is a composite material commonly used for:

• Food packaging

• Bulletproof vests

• Window frames

• Electrical wiring

Which of the following is a property of modern materials?

• They are always natural

• They are developed to have improved properties for specific uses

• They are always biodegradable

• They are always magnetic