13DT HL Topic 4.1 4.2

Mass, Electrical resistivity and Hardness are all characteristics of what?

• Smart Material Properties

• Mechanical Properties

• Physical Properties

• Aesthetic Characteristics

What property of a material determines its ability to return to its original shape after being deformed?

• Hardness

• Elasticity

• Brittleness

• Conductivity

Which material property is crucial for resisting forces that attempt to pull it apart?

• Tensile strength

• Density

• Thermal Conductivity

• Ductility

Which of the following could be characteristics of a composite?

I. Made up entirely of non-metals
II. Are made from two or more constituent materials
III. Can have different characteristics than their original materials

• I and II only

• I and III only

• II and III only

• I, II and III

______ is the phenomenon in which metallic elements other than those of the base metal are intentionally incorporated into the crystal lattice of the base metal.

• Alloying

• Work hardening

• Tempering

• Oxidation

Wood recycling is the process of turning waste timber into usable products. Recycling timber is a practice that was popularised in the early 1990s.

Which of the following issues triggered this trend?

• Demand for MDF

• Deforestation and climate change

• Warping of existing wood

• Oxidisation resistance

Which of the following are characteristics of man-made timber?

• Dimensional stability

• Uniformity of properties

• Greater availability of product sizes

• Lower cost

The presence of impurities in glass produces various colours. Select 3 other characteristics of glass:

• Variable opacity

• Lack of reactivity

• Electrical conductor

• Unbreakable

The characteristics of thermoplastics are:

I. Easily fabricated
II. Ductile
III. Can be injected into a mould

• I and III

• II and III

• I and II

• I, II and III

Which is a vegetable fibre originating from the plant of the same name?

• Wool

• Cotton

• Linen

• Silk