Manufactured Substances in Industry

Which of the following is an alloy?

• Copper

• Brass

• Zinc

• Iron

Which elements are commonly used to make pewter?

• Copper and tin

• Tin, antimony and copper

• Copper and zinc

• Iron and carbon

Why is stainless resistant to rusting?

• It contains zinc, which prevents oxidation

• It is coated with a layer of aluminium

• It is an alloy of iron and carbon

• It contains chromium, which forms a protective oxide layer

Silicon carbide, SiC is an example of advanced ceramic that can be used to manufacture ______

• Car brake

• Window glass

• Electric cable

• Water tank

Which of the following is true about the characteristic of soda-lime glass and borosilicate glass?

• Soda-lime glass has low density and high melting point, while borosilicate glass has high density and low melting point

• Soda-lime glass has low density and low coefficient of thermal expansion, while borosilicate glass has high density and high coefficient of thermal expansion

• Soda-lime glass has high melting point and low thermal shock resistance, while borosilicate glass has low melting point and high thermal shock resistance

• Soda-lime glass has low coefficient of thermal expansion and low thermal shock resistance, while borosilicate glass has high coefficient of thermal expansion and low thermal shock resistance

The main substance in the manufacturing of all types of glass is _____

• Calcium carbonate

• Sodium carbonate

• Lead(II) oxide

• Silicon oxide