5.1 Metallic

Ferrous metal are material with ______ element as the base metal.

• steel

• iron

• carbon

• alloy

Common characteristic of ferrous metal are:

i. Durable

ii. Low resistance to corrosion

ii. Non recyclable

iv. Good conductors of electricity

• i and ii

• i and iii

• i,ii and iii

• i, ii and iv

If the amount of carbon in iron increases, the melting point of the metal ________.

• increases

• decreases

• constant

What type of iron that is actually a liquid metal that is casts into a prepared mold?

• Wrought iron

• Cast iron

The percentage carbon in High carbon steel is

• 0.15% - 0.30%

• 0.30% - 0.80%

• 0.8% - 1.5%

• 1.5% - 2%

Non-ferrous metals are metals that do not contain _______ element.

• iron

• steel

• tin

• alloy

Common characteristic of Non-ferrrous metal are

i. High corrosion resistance

ii. Great thermal conductivity

iii. Colourful

iv. Great electrical conductivity

• i and ii

• i and iii

• i, ii and iii

• i, ii, iii and iv

The color of copper is

• Silver

• Blue-white

• Reddish

• Silvery-white

What non-ferrous metal that is so soft and it is rarely used as a pure metal?

• Copper

• Aluminium

• Zinc

• Tin

What type of non-ferrous metal that is widely used in electrical and air conditioning industries?

• Aluminium

• Zinc

• Copper

• Tin