Materials in Design Technology: Properties, Applications, and Selection

Question 1

Which of the following properties is characteristic of metals?

Accepted Answer

High thermal conductivity

Answer

Low strength-to-weight ratio

Answer

Poor electrical conductivity

Answer

Brittleness

Question 2

Which type of composite material combines a polymer matrix with reinforcing fibres?

Accepted Answer

Laminate

Answer

Concrete

Answer

Plywood

Answer

Particleboard

Question 3

Which of the following characteristics is unique to thermosetting plastics?

Accepted Answer

Form strong intermolecular bonds

Answer

Can be remoulded after curing

Answer

Easily recyclable

Answer

Decompose at low temperatures

Question 4

Which of the following applications is most appropriate for a material with excellent corrosion resistance?

Accepted Answer

Medical implants

Answer

Food packaging

Answer

Building insulation

Answer

Toys

Question 5

Which type of composite material exhibits a combination of lightness and exceptional strength?

Accepted Answer

Glass fibre reinforced plastic

Answer

Aluminium honeycomb

Answer

Particleboard

Answer

Plywood

Question 6

Which type of wood is known for its hardness and durability?

Accepted Answer

Oak

Answer

Pine

Answer

MDF

Answer

Plywood

Question 7

What is the process of shaping metals by applying heat and pressure called?

Accepted Answer

Forging

Answer

Casting

Answer

Extrusion

Answer

Welding

Question 8

What is the primary purpose of heat treatment for metals?

Accepted Answer

To increase strength and hardness

Answer

To reduce brittleness

Answer

To improve corrosion resistance

Answer

To enhance electrical conductivity

Question 9

Identify the non-metallic material known for its excellent electrical and thermal insulation properties:

Accepted Answer

Ceramic

Answer

Wood

Answer

Steel

Answer

Rubber

Question 10

What is the process of rapidly cooling steel after heating it called?

Accepted Answer

Quenching

Answer

Annealing

Answer

Tempering

Answer

Welding

Question 11

When selecting a material for an application involving high temperatures, which property should be a primary consideration?

Accepted Answer

Thermal conductivity

Answer

Corrosion resistance

Answer

Wear resistance

Answer

Electrical conductivity

Question 12

Thermoplastics and thermosetting plastics differ in their behavior; what is the fundamental distinction between them?

Accepted Answer

Thermoplastics can be repeatedly melted and reshaped, unlike thermosetting plastics.

Answer

Thermosetting plastics possess greater strength than thermoplastics.

Answer

Thermoplastics are more economical than thermosetting plastics.

Answer

There is no distinction between thermoplastics and thermosetting plastics.

Question 13

Which property is characteristic of metals?

Accepted Answer

High electrical and thermal conductivity

Answer

Low density

Answer

Brittleness

Answer

Transparency

Question 14

What is the primary motivation for using composite materials in design?

Accepted Answer

To combine the properties of different materials, achieving a tailored set of characteristics

Answer

To reduce weight while maintaining strength

Answer

To improve durability and resistance to wear and tear

Answer

To enhance the aesthetic appeal of the design

Question 15

What is the name of the process that involves heating and cooling a metal to alter its properties?

Accepted Answer

Annealing

Answer

Tempering

Answer

Quenching

Answer

Forging

Question 16

Which of the following is not a type of grain structure that can be found in metals?

Accepted Answer

Laminar

Answer

Equiaxed

Answer

Dendritic

Answer

Columnar

Question 17

Which technique is specifically used to evaluate the electrical characteristics of materials?

Accepted Answer

Electrical conductivity testing

Answer

Tensile testing

Answer

Compression testing

Answer

Hardness testing

Question 18

When developing and using new materials, which ethical consideration should take primary importance?

Accepted Answer

Focusing on minimizing the environmental impact and sustainability.

Answer

Ensuring durability and longevity of the materials.

Answer

Prioritizing cost-effectiveness and affordability.

Answer

Emphasizing the aesthetic appeal and visual qualities of the materials.

Question 19

When choosing materials for a design, which factor is most important for sustainability?

Accepted Answer

Recyclability and biodegradability

Answer

Cost and durability

Answer

Visual appeal and functionality

Question 20

What is the primary component of wood that provides strength and rigidity?

Accepted Answer

Cellulose

Answer

Lignin

Answer

Hemi-cellulose

Answer

Starch

Question 21

Which of the following is a type of advanced composite material?

Accepted Answer

Carbon fibre reinforced plastic (CFRP)

Answer

Aluminium

Answer

Glass

Answer

Steel

Question 22

What is the primary advantage of using sustainable or environmentally friendly materials in design?

Accepted Answer

Reduced environmental impact

Answer

Improved product performance

Answer

Increased production costs

Answer

Faster manufacturing time

Question 23

What is the process of treating wood to improve its durability and resistance to decay and insects called?

Accepted Answer

Preservation

Answer

Seasoning

Answer

Kilning

Answer

Laminating

Question 24

Which type of plastic is commonly used to make lightweight and flexible packaging materials?

Accepted Answer

Polyethylene

Answer

PVC

Answer

Polyurethane

Answer

Polypropylene

Question 25

Which of the following is a natural fibre derived from plant sources?

Accepted Answer

Cotton

Answer

Nylon

Answer

Polyester

Answer

Glass fibre

Question 26

Which type of plastic is known for its exceptional strength, durability, and transparency?

Accepted Answer

Polycarbonate (PC)

Answer

Polyethylene terephthalate (PET)

Answer

Polyvinyl chloride (PVC)

Answer

Polyethylene (PE)

Question 27

Which metalworking process involves applying pressure to shape a metal workpiece?

Accepted Answer

Rolling

Answer

Casting

Answer

Extrusion

Answer

Injection moulding

Question 28

Which type of composite material is composed of fibres embedded in a polymer matrix?

Accepted Answer

Fibre-reinforced plastic

Answer

Metal matrix composite

Answer

Ceramic matrix composite

Answer

Carbon-fibre composite

Question 29

Which test is commonly used to determine the tensile strength of a material?

Accepted Answer

Tensile test

Answer

Hardness test

Answer

Impact test

Answer

Bending test

Question 30

Which factor does NOT contribute to the breakdown of materials?

Accepted Answer

Lack of moisture

Answer

Exposure to ultraviolet radiation

Answer

Exposure to extreme temperatures

Question 31

Which plastic is renowned for its exceptional strength and resistance to chemicals?

Accepted Answer

Polycarbonate

Answer

Polyvinyl Chloride (PVC)

Answer

Polyethylene Terephthalate (PET)

Answer

Polypropylene

Question 32

Which factor significantly influences the strength of a metal?

Accepted Answer

Heat treatment

Answer

Density

Answer

Shape

Answer

Color

Question 33

Which property is NOT characteristic of wood?

Accepted Answer

Isotropic

Answer

Biodegradable

Answer

Strong

Answer

Renewable

Question 34

Which of the following is a type of composite material?

Accepted Answer

Carbon fiber reinforced plastic

Answer

Aluminum

Answer

Steel

Answer

Wood

Question 35

Which test is used to determine the hardness of a material?

Accepted Answer

Brinell hardness test

Answer

Impact test

Answer

Fatigue test

Answer

Tensile test

Question 36

Which of the following materials is considered sustainable?

Accepted Answer

Bamboo

Answer

Steel

Answer

Concrete

Answer

Plastic

Question 37

Which material has the highest density?

Accepted Answer

Lead

Answer

Aluminum

Answer

Wood

Answer

Plastic

Question 38

Which material possesses excellent electrical conductivity?

Accepted Answer

Copper

Answer

Plastic

Answer

Rubber

Answer

Wood

Question 39

Polystyrene is known for its exceptional:

Accepted Answer

Thermal insulation

Answer

Corrosion resistance

Answer

Strength

Answer

Electrical conductivity