Material engineering 2

Aluminium, which a light, …………. and ductile metal, is used to make  aircraft, engine components, foil, and cooking utensils.

• Soft

• tough

• clear

• hard

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

• malleable

• less conductive

• hard

• tough

Safety helmet, car components, telephones and kitchen wares are made of ABS, which has high ……………. and toughness.

• contacts

• plastic

• impact strength

• high conductive

Manufactures use acrylic, which is stiff, hard, very durable and …………….. to make aircraft, canponies, baths, and double glazing.

• clean

• ductile

• malleable

• clear

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

• formed

• performed

• restrained

• reinforced

Bearing, gears and casings for power tools are made of nylon, which is hard, tough and ……………

• a.     tear-resistant

• wear resitant

• rusted

• clean

Epoxy, polyester resin and urea formaldehyde are called

• power tools

• carbon steel

• thermosetting plastics

• themorplastics

Mild steel is a metal which contains iron and ………………… carbon

• 0.3% to 0.45%

• 0.7% to 1.4%

• 0.15% to 0.35%

• 0.15% to 0.3%

Aluminium …………….. to make aircarft is light, soft, and ductile.

• is used

• uses

• which used

• used

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

• complex/molded

• synthetic/molded

• complex/helpful

• synthetic/helpful