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iGCSE DT: Composites

Total questions: 70

Worksheet time: 35mins

Name
Class
Date
1.

What is a composite?

a)

A single material used alone

b)

A mixture of materials combined to enhance their individual properties

c)

A type of metal

d)

A type of plastic

2.

Fill in the blank: A composite is a mixture of materials combined to ______ their individual properties.

a)

enhance

b)

reduce

c)

ignore

d)

separate

3.

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

a)

A) Wooden chair

b)

B) Bulletproof vest

c)

C) Glass cup

d)

D) Steel rod

4.

A composite material is defined as:

a)

A material made from two or more constituent materials with different physical or chemical properties.

b)

A material made from a single element.

c)

A material that is always metallic.

d)

A material that cannot be engineered.

5.

A range of composite materials is:

a)

Fiberglass, carbon fiber, and concrete

b)

Steel, copper, and aluminum

c)

Wood, stone, and brick

d)

Plastic, rubber, and glass

6.

Practical applications of composite materials include:

a)

Aircraft components, sports equipment, and automotive parts

b)

Only food packaging

c)

Only textile manufacturing

d)

Only paper production

7.

A composite is a term used to describe a ______ made by combining two or more materials.

a)

material

b)

color

c)

shape

d)

temperature

8.

The materials combined in a composite usually have significantly different ______ or ______ properties.

a)

chemical, physical

b)

magnetic, radioactive

c)

optical, acoustic

d)

thermal, elastic

9.

When combined, each material’s ______ is retained in a composite.

a)

structure

b)

color

c)

weight

d)

temperature

10.

True or False: In a composite, the individual materials blend, merge, or dissolve into each other.

a)

True

b)

False

11.

The individual materials in a composite work together and have ______ properties, such as lighter weight or increased strength.

a)

enhanced

b)

diminished

c)

random

d)

unpredictable

12.

Most composites are made of two materials: the ______, which surrounds or binds the other material, and the fibre or reinforcement.

a)

matrix

b)

resin

c)

core

d)

sheath

13.

Composites can usually be engineered to meet specific requirements for a specific ______.

a)

application

b)

color

c)

season

d)

flavor

14.

Which of the following is a fibre based composite?

a)

Concrete

b)

GRP

c)

Chipboard

d)

MDF

15.

Which category do Concrete, GRC, and Cermets belong to?

a)

Fibre based

b)

Particle based

c)

Sheet based

d)

None of the above

16.

Fill in the blank: Boards made from wood pulp, chips or layers are examples of ________ composites.

a)

Sheet based

b)

Fibre reinforced

c)

Metal matrix

d)

Polymer matrix

17.

Which of the following is NOT a sheet based composite?

a)

Chipboard

b)

MDF

c)

GRP

d)

Plywood

18.

What are Glass Fibre Reinforced Polymers (GRP) / Fibreglass available in?

a)

Different weights & strengths

b)

Only one standard size

c)

Liquid form only

d)

Metal sheets

19.

What forms the flexible matrix/fabric in GRP?

a)

Strands of glass

b)

Carbon fibers

c)

Polyester resin

d)

Steel wires

20.

What is the reinforcement in GRP?

a)

Glass fibre woven fabric

b)

Carbon fibre mat

c)

Polyester resin

d)

Steel rods

21.

What is the matrix material in GRP?

a)

Polyester resin

b)

Epoxy adhesive

c)

Polyethylene

d)

Polycarbonate

22.

GRP can be smoothed via _______ and finishes added.

a)

sanding

b)

painting

c)

welding

d)

gluing

23.

Is GRP suitable for batch production?

a)

True

b)

False

24.

What are the properties of GRP?

a)

Lightweight & very strong

b)

Heavy & brittle

c)

Highly conductive

d)

Easily corroded

25.

Which of the following is NOT a use of GRP?

a)

Car bodies

b)

Water tanks

c)

Swimming pool slides

d)

Cooking pots

26.

Which material is applied in layers and rolled out during the GRP manufacturing process?

a)

Wax

b)

Gel coat

c)

Fiberglass, resin, and catalyst

d)

Paint

27.

What is the purpose of applying a gel coat in the GRP manufacturing process?

a)

To act as a mold release

b)

To provide color

c)

To strengthen the mold

d)

To cure the part

28.

What does CFRP stand for?

a)

Carbon Fibre Reinforced Polymers

b)

Copper Fibre Reinforced Plastics

c)

Carbon Fibre Resin Polymers

d)

Composite Fibre Resin Polymers

29.

Fill in the blank: High tensile strength carbon fibres are woven together, then encased in a ________ resin.

a)

polymer

b)

metal

c)

glass

d)

ceramic

30.

Which of the following is NOT a property of Carbon Fibre Reinforced Polymers (CFRP)?

a)

Rigid

b)

Lightweight

c)

Very strong

d)

Easily stretched

31.

Carbon fibres are resistant to stretching.

a)

True

b)

False

32.

Fill in the blank: CFRP is used to replace traditional heavier, ________ based materials.

a)

metal

b)

plastic

c)

wood

d)

ceramic

33.

Which of the following best describes the cost of CFRP compared to other composites?

a)

Least expensive

b)

Moderately expensive

c)

One of the most expensive

d)

Cheapest

34.

Kevlar is made by combining _______ with terephthaloyl chloride.

a)

paraphenylenediamine

b)

aniline

c)

phenol

d)

toluene

35.

Kevlar is combined with _______ to make a composite material.

a)

resin

b)

water

c)

sand

d)

glass

36.

Which of the following is stronger than steel when woven and manufactured into garments?

a)

Nylon

b)

Kevlar

c)

Cotton

d)

Polyester

37.

Which of the following is NOT a property of Kevlar?

a)

Super strong

b)

Lightweight

c)

Flexible

d)

Weak

38.

Kevlar is ______ times stronger than nylon.

a)

9

b)

3

c)

5

d)

12

39.

Kevlar is used for PPE for people working in _______ jobs.

a)

hazardous

b)

comfortable

c)

routine

d)

sedentary

40.

Name one use of Kevlar in sports.

a)

Sports equipment

b)

Food packaging

c)

Musical instruments

d)

Medical implants

41.

Which of the following is NOT a use of Kevlar?

a)

A) Body protection

b)

B) Sails for windsurfing

c)

C) Food packaging

d)

D) Run flat tyres

42.

What are the main materials that make up concrete?

a)

Sand and cement

b)

Water and glass

c)

Plastic and metal

d)

Wood and clay

43.

Fill in the blank: Concrete can be further reinforced with glass fibres to make _________

a)

glass reinforced concrete (GRC)

b)

polymer concrete

c)

ferrocement

d)

prestressed concrete

44.

Glass fibres in GRC replace the need for aggregate such as gravel and stone.

a)

True

b)

False

45.

Concrete is made of ________, sand, and cement.

a)

aggregates

b)

water

c)

bricks

d)

glass

46.

What is added to the dry mix of concrete before it is cast and left to harden?

a)

Water

b)

Sand

c)

Lime

d)

Gravel

47.

Concrete can be further reinforced with glass fibres to make ________.

a)

glass reinforced concrete (GRC)

b)

polymer concrete (PC)

c)

fiberboard (FB)

d)

prestressed concrete (PSC)

48.

Concrete can be moulded into complex shapes.

a)

True

b)

False

49.

Concrete has similar properties to ________.

a)

stone

b)

wood

c)

plastic

d)

glass

50.

Concrete can be cast in situ (on site), whereas stone has to be quarried and cut to shape.

a)

True

b)

False

51.

Concrete has excellent ________ strength, making it particularly good in building and for their foundations.

a)

compressive

b)

tensile

c)

shear

d)

flexural

52.

Why is it necessary to reinforce concrete beams with metal rods when spanning large distances?

a)

Because concrete is poor in tension.

b)

Because concrete is too expensive.

c)

Because metal rods are decorative.

d)

Because concrete is too light.

53.

What are composites?

a)

A single material

b)

A mixture of materials combined to improve their properties

c)

A type of metal

d)

A type of wood

54.

Composites generally fall into one of three groups: fibre based composites, particle based composites, and _________

a)

sheet based composites

b)

liquid based composites

c)

gas based composites

d)

crystal based composites

55.

Which of the following are fibre based composites?

a)

Concrete and cement

b)

Carbon Fibre, GRP, and GRC

c)

Plywood and MDF

d)

Timber and metal

56.

Particle based composites include ________ and ________.

a)

concrete and cement

b)

steel and glass

c)

plastic and rubber

d)

wood and fiber

57.

Manufactured boards such as ________ and ________ are sheet based composites because they are a combination of wood and resin.

a)

Plywood and MDF

b)

Oak and Pine

c)

Teak and Mahogany

d)

Cedar and Maple

58.

Composites are now being used to replace traditional materials such as timber and metal.

a)

True

b)

False

59.

What is a composite? Fill in the blank: A composite is a mixture of materials _______ to enhance their properties.

a)

combined

b)

separated

c)

destroyed

d)

isolated

60.

Which of the following is an example of a particle based composite?

a)

GRP

b)

MDF

c)

Concrete

d)

Alloy

61.

Which of the following is an example of a fibre based composite?

a)

Concrete

b)

GRP

c)

MDF

d)

Alloy

62.

Which of the following is an example of a sheet based composite?

a)

Concrete

b)

GRP

c)

MDF

d)

Alloy

63.

What does the acronym GRP stand for? Fill in the blank: GRP is ________ Reinforced Plastic.

a)

Glass

b)

Graphite

c)

Granite

d)

Gold

64.

Name two composite materials.

a)

1. Carbon fibre reinforced plastic (CFRP) 2. Reinforced concrete

b)

1. Pure copper 2. Pure aluminium

c)

1. Glass 2. Wood

d)

1. Iron 2. Gold

65.

Fig. 8.1 shows a car shell made from carbon fibre reinforced plastic (CFRP). Give two advantages of using carbon fibre reinforced plastic (CFRP) rather than steel for the car shell.

a)

1. Lighter weight 2. Greater strength or corrosion resistance

b)

1. Heavier weight 2. Lower strength

c)

1. More expensive 2. Less durable

d)

1. Poorer corrosion resistance 2. Lower safety

66.

Concrete is an example of which type of composite?

a)

Particulate composite

b)

Laminar composite

c)

Fibre-reinforced composite

d)

Polymeric composite

67.

Name a fibre based composite.

a)

Carbon fibre reinforced polymer

b)

Stainless steel

c)

Aluminium alloy

d)

Polyethylene

68.

Name a specific application for that composite.

a)

Aircraft components

b)

Food packaging

c)

Textile dyeing

d)

Pharmaceutical tablets

69.

Kevlar is specifically used in which of the following applications?

a)

Bulletproof vests

b)

Cooking utensils

c)

Window glass

d)

Electrical wiring

70.

Modern boat hulls are typically made from:

a)

Fiberglass

b)

Wood

c)

Steel

d)

Concrete