Metals Quiz

What property of metals allows them to be shaped without breaking?

• Reflectivity

• Conductivity

• Malleability

• Transparency

What is a common method to improve the properties of metal alloys?

• Painting

• Quenching

• Heat-treating

• Polishing

Which material is not a metal?

• Nickel

• Leather

• Titanium

• Copper

Which category does Wrought Iron belong to?

• Ferrous

• Non-ferrous

• Natural

• Synthetic

Which metal has higher electrical and thermal conductivities than high purity copper?

• Gold

• Iron

• Silver

• Aluminum

What percentage of lead is added to produce free-cutting brass?

• 1% to 2%

• 2% to 3%

• 3% to 4%

• 4% to 5%

What is the main characteristic of free-cutting brass?

• High electrical conductivity

• Excellent high-speed machining properties

• High thermal resistance

• Low cost

What additional elements can bronze contain besides copper and tin?

• Zinc and phosphorus

• Nickel and manganese

• Aluminium and iron

• Silver and gold

What is the minimum percentage of tin in phosphor bronze as a cast material?

• 5%

• 10%

• 15%

• 20%

For which applications are gunmetal castings largely used?

• Electrical wiring

• Naval purposes

• Jewelry making

• Construction beams