wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Composite Materials Quiz

Total questions: 70

Worksheet time: 35mins

Name
Class
Date
1.

What is a composite material?

a)

A homogeneous material composed of identical constituents.

b)

A heterogeneous combination of two or more materials differing in form or composition that remain separate at their interface.

c)

A pure metal alloy.

d)

A mixture where the constituents dissolve completely.

2.

In a composite, the interface between constituents:

a)

Completely dissolves.

b)

Partially reacts forming a new compound.

c)

Remains distinct and separate.

d)

Is eliminated through heat treatment.

3.

Which of the following is a type of composite based on reinforcement?

a)

Metallic

b)

Ceramic

c)

Fiber-reinforced

d)

Thermoplastic

4.

Biocomposites can be categorized as:

a)

Polymer–metal composites only.

b)

Natural or biofibre-based and synthetic fibre-based composites.

c)

Metallic and ceramic composites.

d)

Hybrid ceramics.

5.

Hybrid composites are made by combining:

a)

Metal and ceramic only.

b)

Two or more types of fibres or matrices.

c)

Liquid and solid phases.

d)

Crystalline and amorphous polymers.

6.

Which is a structural composite?

a)

Laminate

b)

Polymer

c)

Ceramic

d)

Metal

7.

Natural fibre reinforced composites are made of:

a)

Synthetic fibres and thermosets.

b)

Plant-based fibres in polymer matrices.

c)

Metal oxides and resins.

d)

Carbon fibres in ceramics.

8.

One major advantage of natural fibre composites is:

a)

Non-biodegradability.

b)

Low strength.

c)

Renewable and eco-friendly raw materials.

d)

High density.

9.

Which technique is used for short or chopped fibres in composite processing?

a)

Filament winding

b)

SMC/BMC (Sheet or Bulk Moulding Compression)

c)

Pultrusion

d)

Injection moulding

10.

Filament winding is primarily used to manufacture:

a)

Flat panels.

b)

Hollow circular or prismatic parts like pipes and tanks.

c)

Laminated sheets.

d)

Pellets for extrusion.

11.

Resin Transfer Moulding (RTM) involves:

a)

Open mould and brushing resin.

b)

Injecting resin under pressure into a closed mould with dry fibres.

c)

Extrusion of molten thermoplastic.

d)

Heating granules in a compression mould.

12.

Injection moulding is ideal for:

a)

One-off prototype production.

b)

Mass production of complex plastic parts.

c)

Thermoset curing only.

d)

Simple shapes with low precision.

13.

Blow moulding produces:

a)

Solid rods.

b)

Hollow plastic objects by inflating molten tubes (parisons).

c)

Coated fibres.

d)

Reinforced laminates.

14.

Thermoforming involves:

a)

Cooling molten resin in molds.

b)

Heating plastic sheets until soft and shaping them in molds.

c)

Injecting resin into cavities.

d)

Crosslinking monomers.

15.

Calendering produces:

a)

Hollow objects.

b)

Continuous sheets or films with controlled thickness.

c)

Reinforced rods.

d)

Cured thermosets only.

16.

Spin coating is used to:

a)

Form thin polymer films on flat substrates.

b)

Produce thick coatings on rough surfaces.

c)

Inject molten resin into molds.

d)

Apply adhesive layers on fibres.

17.

Which property is enhanced in fibre-reinforced composites?

a)

Strength-to-weight ratio.

b)

Density.

c)

Conductivity.

d)

Brittleness.

18.

Hand lay-up method involves:

a)

Automated fibre placement.

b)

Manually placing dry fibres and brushing resin onto them.

c)

Resin injection under vacuum.

d)

Compression curing.

19.

The key factors affecting manufacturing process selection include:

a)

Color and texture.

b)

Production rate, cost, part size and strength requirements.

c)

Aesthetic appeal only.

d)

Curing temperature only.

20.

Composite density is calculated as:

a)

Volume / Mass

b)

Mass / Volume

c)

Force / Area

d)

Load / Elongation

21.

Void content in composites is determined using:

a)

ASTM D543

b)

ASTM D2734

c)

ASTM D638

d)

ASTM D256

22.

Water absorption is measured using:

a)

ASTM D1895

b)

ASTM D570

c)

ASTM D2734

d)

ASTM D3039

23.

Chemical resistance tests (ASTM D543) check:

a)

Flexural strength.

b)

Weight change after exposure to chemicals.

c)

Melting point.

d)

Electrical conductivity.

24.

Tensile tests for biocomposites follow:

a)

ASTM D543

b)

ASTM D638 or D3039

c)

ASTM D790

d)

ASTM D785

25.

Flexural tests (bending) use which standard?

a)

ASTM D790

b)

ASTM D256

c)

ASTM D2734

d)

ASTM D3039

26.

Impact strength (toughness) is determined by:

a)

Izod test (ASTM D256).

b)

Rockwell hardness.

c)

TGA analysis.

d)

Compression test.

27.

Hardness testing in biocomposites commonly uses:

a)

Rockwell hardness test (ASTM D785).

b)

Vickers test.

c)

Charpy test.

d)

Brinell test.

28.

Non-destructive testing (NDT) identifies:

a)

Structural color changes.

b)

Internal and surface defects without damaging the specimen.

c)

Density variations.

d)

Optical properties only.

29.

Which method detects internal cracks using sound waves?

a)

Radiography (RT)

b)

Ultrasonic testing (UT).

c)

Thermography.

d)

Visual inspection.

30.

Which NDT technique uses X-rays to locate internal voids?

a)

Radiography (RT).

b)

Ultrasonic testing.

c)

Shearography.

d)

Acoustic emission.

31.

In SEM imaging, gold sputtering is used to:

a)

Colorize images.

b)

Prevent surface charging and improve conductivity.

c)

Increase tensile strength.

d)

Remove organic content.

32.

EDX analysis provides:

a)

Crystallinity percentage.

b)

Elemental composition of the material.

c)

Optical transmittance.

d)

Flexural strength.

33.

XRD determines whether a material is:

a)

Amorphous or crystalline.

b)

Conductive or insulating.

c)

Organic or inorganic.

d)

Brittle or ductile.

34.

FT-IR spectroscopy identifies:

a)

Functional groups and chemical structure changes.

b)

Crystalline peaks.

c)

Tensile strength.

d)

Density variation.

35.

Thermogravimetric analysis (TGA) measures:

a)

Weight change of a sample with temperature increase.

b)

Elastic modulus.

c)

Density.

d)

Optical thickness.

36.

Differential Scanning Calorimetry (DSC) is used to determine:

a)

Thermal transitions like Tg and Tm.

b)

Sample composition.

c)

Optical refractive index.

d)

Void percentage.

37.

The % crystallinity from XRD is calculated by:

a)

(Area of crystalline peaks / Total area of peaks) × 100.

b)

(Mass / Volume) × 100.

c)

(Peak intensity / Background) × 10.

d)

(Height difference / Width).

38.

UV degradation of biocomposites primarily affects:

a)

Lignin in fibres.

b)

Hemicellulose only.

c)

Crystalline cellulose.

d)

Resin interface only.

39.

Which component is most responsible for moisture absorption in biocomposites?

a)

Hemicellulose.

b)

Lignin.

c)

Crystalline cellulose.

d)

Polyester.

40.

Toughness of a biocomposite is measured by:

a)

Izod or Charpy impact tests.

b)

Rockwell hardness.

c)

Density measurement.

d)

Tensile modulus.

41.

Which process causes degradation of natural fibre composites under sunlight exposure?

a)

UV photodegradation.

b)

Chemical oxidation.

c)

Thermal decomposition.

d)

Hydrolysis.

42.

During UV degradation, lignin in fibres primarily:

a)

Strengthens the matrix.

b)

Absorbs radiation and forms chromophoric groups leading to degradation.

c)

Prevents chain scission.

d)

Increases crystallinity.

43.

Which degradation mechanism involves the formation of hydroperoxy radicals and quinones?

a)

Photodegradation.

b)

Biodegradation.

c)

Thermal degradation.

d)

Hydrolysis.

44.

Which component of the cell wall contributes most to biological degradation?

a)

Hemicellulose.

b)

Lignin.

c)

Crystalline cellulose.

d)

Polyester.

45.

Which constituent mainly affects thermal degradation?

a)

Hemicellulose.

b)

Lignin.

c)

Cellulose.

d)

Resin.

46.

Which cell wall component improves strength in natural fibre composites?

a)

Crystalline cellulose.

b)

Hemicellulose.

c)

Lignin.

d)

Resin.

47.

Which material is most responsible for moisture absorption in fibres?

a)

Hemicellulose.

b)

Lignin.

c)

Crystalline cellulose.

d)

Resin filler.

48.

According to ASTM D1895, which property is measured?

a)

Density.

b)

Tensile strength.

c)

Flexural modulus.

d)

Chemical resistance.

49.

Which ASTM standard measures void content in composites?

a)

D2734.

b)

D543.

c)

D638.

d)

D790.

50.

Water absorption and thickness swelling are both measured using:

a)

ASTM D570

b)

ASTM D543

c)

STM D3039

d)

ASTM D256

51.

Chemical resistance testing (ASTM D543) measures:

a)

Swelling ratio

b)

Weight change after chemical exposure

c)

Hardness

d)

Elastic modulus

52.

Which mechanical property test measures modulus, strength, and ductility?

a)

Tensile test (ASTM D638 / D3039)

b)

Impact test (ASTM D256)

c)

Hardness test (ASTM D785)

d)

Compression test

53.

Flexural strength and modulus are determined by:

a)

ASTM D790

b)

ASTM D2734

c)

ASTM D3039

d)

ASTM D785

54.

Impact resistance or toughness is evaluated using:

a)

Izod test (ASTM D256)

b)

Rockwell test

c)

DSC

d)

FT-IR

55.

Which hardness test is commonly used for biocomposites?

a)

Rockwell hardness (ASTM D785)

b)

Brinell test

c)

Vickers test

d)

Mohs test

56.

Visual Testing (VT) is used to detect:

a)

Internal voids

b)

Surface defects visible to the eye

c)

Delamination through heat

d)

Strain variations

57.

Ultrasonic Testing (UT) detects:

a)

Internal cracks and voids using sound waves

b)

Surface color changes

c)

Radiation damage

d)

Chemical contamination

58.

Radiographic Testing (RT) identifies:

a)

Elemental composition

b)

Internal defects using X-rays

c)

Molecular structure

d)

Surface roughness

59.

Thermography identifies voids or delaminations by detecting:

a)

Heat flow or temperature patterns

b)

Sound waves

c)

Electron emission

d)

Magnetic response

60.

Acoustic Emission (AE) analysis detects:

a)

Chemical reactions

b)

Crack growth by sound release

c)

Radiation intensity

d)

Thermal expansion

61.

Shearography detects:

a)

Strain variations and structural instability in composites

b)

Optical transparency

c)

Density variations

d)

Colour defects

62.

SEM (Scanning Electron Microscopy) provides:

a)

Mechanical properties

b)

Images of fibre–matrix bonding and fracture surfaces

c)

Optical transparency data

d)

Chemical spectra only

63.

EDX (Energy Dispersive X-ray) provides information about:

a)

Thermal decomposition

b)

Elemental composition and mapping

c)

Hardness distribution

d)

Optical clarity

64.

XRD (X-Ray Diffraction) analysis provides:

a)

Crystallinity and crystal structure information

b)

Functional groups

c)

Moisture content

d)

Flexural modulus

65.

FT-IR (Fourier Transform Infrared) detects:

a)

Functional groups and surface chemical changes after treatment

b)

Crystalline order only

c)

Hardness

d)

Thermal stability

66.

TGA (Thermogravimetric Analysis) measures:

a)

Weight loss with increasing temperature

b)

Heat absorption

c)

Hardness

d)

Optical absorption

67.

DSC (Differential Scanning Calorimetry) measures:

a)

Heat flow during heating or cooling, showing Tg and Tm

b)

Weight loss over time

c)

Impact energy

d)

Strain at failure

68.

Which test measures strain variations particularly useful for composites?

a)

Shearography

b)

Radiography

c)

Ultrasonics

d)

Visual testing

69.

Which test shows the fibre–matrix bonding interface?

a)

SEM imaging

b)

TGA

c)

DSC

d)

XRD

70.

Which property is determined using ASTM D1895?

a)

Density

b)

Flexural modulus

c)

Chemical resistance

d)

Void content

Similar Resources on Wayground

Engineering Technology Foundations Practice Test

71 questions

Engineering Technology Foundations Practice Test

quiz

Worksheet

•

9th Grade - University

jhkuu

75 questions

jhkuu

quiz

Worksheet

•

University

Вопросы по материалам и процессам

70 questions

Вопросы по материалам и процессам

quiz

Worksheet

•

University

Evaluación de Competencias - Maquinaria

70 questions

Evaluación de Competencias - Maquinaria

quiz

Worksheet

•

University

POSTHARVEST MACHINERY STANDARDS & MOT’s

70 questions

POSTHARVEST MACHINERY STANDARDS & MOT’s

quiz

Worksheet

•

University

Entrepreneurship and Design Thinking Worksheet

70 questions

Entrepreneurship and Design Thinking Worksheet

quiz

Worksheet

•

University