Understanding Metals and Plastics Properties

Which of the following is a mechanical property of metals?

• Colour

• Tensile strength

• Melting point

• Electrical conductivity

What is the primary cause of corrosion in metals?

• Exposure to sunlight

• Reaction with oxygen and moisture

• High temperatures

• Low temperatures

Which of the following metals is known for its excellent corrosion resistance?

• Iron

• Aluminium

• Copper

• Stainless steel

What is plastic deformation in metals?

• Temporary change in shape

• Permanent change in shape

• Change in colour

• Change in temperature

Elasticity in materials refers to:

• The ability to conduct electricity

• The ability to return to original shape after deformation

• The ability to resist corrosion

• The ability to absorb water

Which of the following is an example of a composite material?

• Steel

• Brass

• Concrete

• Aluminium

What is the unit of tensile strength in the metric system?

• Newtons

• Pascals

• Joules

• Metres

Which property of metals is most affected by corrosion?

• Electrical conductivity

• Density

• Tensile strength

• Colour

Which of the following metals is least likely to undergo plastic deformation?

• Gold

• Lead

• Tungsten

• Copper

What is the primary advantage of using composite materials in engineering?

• Low cost

• High strength-to-weight ratio

• High electrical conductivity

• High thermal conductivity