Materials

Copper, which is very ……………, tough and ductile and highly conductive, is used to make electric wiring, PCBs and tubing.

• less conductive

• malleable

• hard

• tough

An insulator is a material which does not allow heat or current to flow easily.

…………………is a metallic alloy which consists of copper and zinc.

• Brass

• High carbon steel

• A condutor

• A thermoplastics

…………… formed by mixing other metals or elements.

• A conductor

• An insulator

• An alloy

• A thermoplastic

Acrylic can be polished and …………….. easily.

• formed

• performed

• restrained

• reinforced

…………….. is a material which remains rigid at high temperatures.

• An alloy

• A conductor

• An insulator

• A thermosetting plastic

…………………. is a material which allows heat or current to flow easily

• An insulator

• A conductor

• Brass

• high carbon steel

Plastics are ………………. materials which can be softened and …………… into useful articles.

• complex/molded

• synthetic/molded

• complex/helpful

• sythetic/helpful

……………… is a material which does not allow heat or current to flow easily.

• Brass

• Mild steel

• An insulator

• A conductor

Epoxy, polyester resin and urea formaldehyde are called

• power tools

• carbon steel

• thermosetting plastics

• thermoplastics