Non-Ferrous metal

What is the primary characteristic of non-ferrous metals?

• Contain high quantities of iron

• Contain no iron or only very small quantities

• Are always magnetic

• Have low electrical conductivity

Copper is refined from which substances?

• Bauxite (Al2O3.nH2O)

• Iron Oxides

• Zinc Carbonate

• Copper sulphides (Cu2S or CuFeS2)

Which property is NOT associated with copper?

• Low corrosion-resistance

• Malleability

• Ductility

• High electrical conductivity

What is a common use of copper in electrical applications?

• As a main component in steel production

• As a decorative material

• In the form of wire and strip for electrical appliances

• For making jewelry

Which alloy is NOT correctly paired with copper?

• Both Brasses and Bronzes are correctly paired

• Brasses (Cu – Zn)

• Bronzes (Cu – Sn)

• Steel (Cu – Fe)

What is aluminium primarily refined from?

• Zinc Blende

• Iron Ore

• Bauxite (Al2O3.nH2O)

• Copper Sulphides

Which property is NOT associated with aluminium?

• Good conductor of electricity

• Forms an inert oxide when exposed to the atmosphere

• High specific gravity

• Very light metal

For what purpose does aluminium need to be reinforced with a steel core?

• To improve its decorative appeal

• To increase its weight

• To increase its strength for use in power cables

• To enhance its electrical conductivity

Which industry extensively uses alloys of aluminium?

• Textile industry

• Paper industry

• Aircraft industry

• Food industry

What is added to brasses to improve their machinability?

• Zinc

• Copper

• Tin

• Lead (Pb)