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ADVANCED MATERIALS A222 1

Total questions: 60

Worksheet time: 31mins

Name
Class
Date
1.

Composite is combination of reinforcement and matrix

a)

True

b)

False

2.

Which one is the function of reinforcement

a)

Protect fiber

b)

Provide strength and stiffness

c)

Hold the fiber together

d)

protect fiber from mechanical damage

3.

Below are type of reinforcement EXCEPT

a)

particles

b)

short fiber

c)

long fiber

d)

rod fiber

4.

PMCs is refers to

a)

Polymer matrix composite

b)

Ceramic matric composite

c)

Metal matrix composite

5.

Below are the disadvantages for PMCs EXCEPT

a)

High coefficient of thermal expansion

b)

sensitivity to moisture and radiation

c)

higher strength

d)

Low maximum working temperature

6.

For thermoset polymer matrix composite, it can processes through..

a)

Resin transfer molding

b)

Hand layup

c)

Filament winding

d)

Pultrusion

7.

Below is the process of..

a)

Pultrusion

b)

Hand layup

c)

Resin transfer moulding

d)

Filament winding

8.

In hand layup process, the resin and fiber will be laminated using

a)

scrapper

b)

hand roller

c)

hand

d)

vaccum

9.

Below is the process of........and suitable to produce......

a)

Pultrusion, reservoir tank

b)

Filament winding, body boat

c)

Filament winding, pressure tank

d)

resin transfer molding, boat hull

10.

Picture above is the process of..............which can produced.....................

a)

Filament winding, pressure tank

b)

Pultrusion, short fibre volume profile with a varies cross section

c)

Pultrusion, high fibre volume profile with a constant cross section

d)

Pultrusion, particulate volume profile with constant cross section

11.

Composites are usually classified by the type of material used for the matrix. The 3 types of composite materials are:

a)

Metal matrix composite

b)

Polymer matrix composite

c)

Ceramic matrix composite

d)

Plastic matrix composite

12.

These are the characteristic of ceramics material EXCEPT

a)

Tend to be brittle.

b)

Poor electric conductor.

c)

Good heat and wear resistance.

d)

Flexible.

13.

Composite materials are classified based on __________.

a)

types of matrix

b)

size-and-shape of reinforcement

c)

both matrix and reinforcement

d)

none

14.

Which of the following is the major load carrier in dispersion-strengthened composites?

a)

Matrix

b)

Fibre

c)

Both matrix and fibre

d)

Can’t define

15.

Usually, the stronger constituent of a composite is __________.

a)

reinforcement

b)

matrix

c)

matrix and reinforcement are equal strength

d)

can’t define

16.

Which one of the following polymer types are most commonly used in polymer matrix composites?

a)

Elastomer

b)

Thermoplastic and thermoset

c)

Thermoplastic

d)

Thermoplastic, thermoset and elastomer

17.

The matrix phase controls the environmental resistance of the composites.

a)

True

b)

False

18.

Which of the following type of composite is NOT classified under the category of number of layers?

a)

Unidirectional fibre

b)

Laminar

c)

reinforced Sandwich panels

d)

Glass-fibre reinforced

19.

Which of the following is NOT a characteristic of glass-fibre reinforced composites?

a)

Low density

b)

Low impact resistance

c)

High tensile strength

d)

Excellent chemical and corrosion resistance

20.

Which of the following is used as reinforcement in advanced polymer matrix composite?

a)

Glass-fibre reinforced

b)

Carbon-fibre reinforced

c)

Wood-fibre reinforced

d)

Unidirectional-fibre reinforced

21.

Fillers and additives can improve _____________ of composites.

a)

performance parameters

b)

weight

c)

stress

d)

colour

22.

Which of the following is not a property of matrix materials which are modified by adding particulate fillers?

a)

Improved performance at elevated temperature

b)

Decrease in surface hardness

c)

Modification in electrical conductivity

d)

Improved abrasion resistance

23.

What is aspect ratio?

a)

Length to diameter ratio

b)

Length to depth ratio

c)

Depth to length ratio

d)

Diameter to length ratio

24.

Which of the following type of composite is not classified under the category of number of layers?

a)

Unidirectional fibre reinforced

b)

Laminar

c)

Sandwich panels

d)

Glass-fibre reinforced

25.

What is the definition of a composite?

a)

Composites are when you weld two or more metals together to form a new type of metal.

b)

Composites are a combination of two or more materials that are bonded together to improve their mechanical or physical properties.

c)

Composites are when you take 2 or more metals and fuse them through melting.

d)

Composites are when you take 2 or more matrix and mix them to create a new material.

26.

True or False - Particle re-enforcing in composites is a less effective means of strengthening than fibre reinforcement

a)

True

b)

False

27.

what is a matrix

a)

fibers that give the composite strength

b)

material that retains its own structure

c)

working together of reinforcements and heat

d)

continuous portion of the composites

28.

what is reinforcement

a)

fibers or particles that give the composites strength,stiffness and density

b)

a composite with different sets of properties than its constituent materials

c)

decrease in cracking by distributing stress evenly

d)

fillers added to save money or modify properties

29.

This have a qualities such as lightweight, high stiffness, high strength in the direction of reinforcement and corrision resistance.

a)

Flake Composites

b)

Metal Matrix Composites

c)

Ceramic Matrix Composites

d)

Polymer Matrix Composites

30.

Made up of hard particle components that are randomly disperse in a softer matrix.

a)

Particulate Reinforced Composites

b)

Laminated Composites

c)

Flake Composites

d)

FIber Reinforced Composites

31.

It is the most popular metal matrix composites.

a)

Aluminum Matrix Composites

b)

Matrix Composites

c)

Flake Composites

d)

Laminated Composites

32.

Which of these is NOT a classification of composite?

a)

Particle Reinforced

b)

Fibre Reinforced

c)

Structural

d)

Aerocomposite

33.

Which of these can act as Reinforcement/Fibres

a)

Carbon

b)

Kevlar

c)

Glass

d)

Kenaf

34.

Which one of these is NOT SUITABLE as matrix material/resin?

a)

Epoxy

b)

Unsaturated Polyester

c)

Silicone

d)

Phenolic

35.

Which of these material suitable as reinforcement for bulletproof application?

a)

Carbon Fibre

b)

Glass Fibres

c)

Aramid Fibres

d)

Honeycomb cores

36.

Properties of the composite are dominated by the contribution of the Matrix/Resin to the composite. True or False?

a)

True

b)

False

37.

Which of these is Roles of Matrix material / Resin ?

a)

To bind the fibers together

b)

To transfer external load to fibers

c)

To protect the fibres from environments and handling

d)

Keeps the reinforcing fibers in the proper orientation

38.

These composites are utilized extensively as cutting tools for hardened steels.

a)

Polymers with Filler

b)

Cermets

c)

Concrete

39.

a common large- particle composite in which both matrix and dispersed phases are ceramic materials

a)

Polymers with Filler

b)

Cermets

c)

Concrete

40.

Composites with exceptionally high specific strengths and moduli have been produced that use low-density fiber and matrix materials.

a)

fiber-reinforced composites

b)

particle-reinforced composites

c)

structural composites

d)

nanocomposites

41.

Classification of fiber which are very thin single crystals that have extremely large length-to-diameter ratios; they are among the strongest known materials.

a)

Whiskers

b)

Fibers

c)

Wires

42.

Classification of fiber which have relatively large diameters; typical materials include steel, molybdenum, and tungsten.

a)

Whiskers

b)

Fibers

c)

Wires

43.

Fibers for which its length is greater than the critical length.

a)

continuous

b)

discontinuous and aligned

c)

discontinuous and randomly oriented

44.

Discontinuous fibers for which a parallel alignment of the longitudinal axis of the fibers in a single direction.

a)

continuous

b)

discontinuous and aligned

c)

discontinuous and randomly oriented

45.

Currently being used extensively in sports and recreational equipment (fishing rods, golf clubs), filament-wound rocket motor cases, pressure vessels, and aircraft structural components—both military and commercial, both fixed-wing aircraft and helicopters (e.g., as wing, body, stabilizer, and rudder components).

a)

Glass Fiber–Reinforced Polymer (GFRP) Composites

b)

Carbon Fiber–Reinforced Polymer (CFRP) Composites

c)

Aramid Fiber–Reinforced Polymer Composites

d)

Boron fiber–reinforced polymer composites

46.

Applications of these are in ballistic products (bulletproof vests and armor), sporting goods, tires, ropes, missile cases, and pressure vessels and as a replacement for asbestos in automotive brake and clutch linings and gaskets.

a)

Glass Fiber–Reinforced Polymer (GFRP) Composites

b)

Carbon Fiber–Reinforced Polymer (CFRP) Composites

c)

Aramid Fiber–Reinforced Polymer Composites

d)

Boron fiber–reinforced polymer composites

47.

These materials may be used at higher service temperatures than their base-metal counterparts, the reinforcement may improve specific stiffness, specific strength, abrasion resistance, creep resistance, thermal conductivity, and dimensional stability.

a)

Polymer-Matrix composites

b)

Metal-Matrix composites

c)

Ceramic-Matrix composites

d)

Carbon–Carbon composites

48.

One of the most advanced and promising of engineering materials.

a)

Polymer-Matrix composites

b)

Metal-Matrix composites

c)

Ceramic-Matrix composites

d)

Carbon–Carbon composites

49.

Size range of dispersoids used in dispersion strengthened composites

a)

0.01-0.1 μm

b)

0.01-0.1 nm

c)

0.01-0.1 mm

d)

None

50.
What are some advantages of synthetic materials?
a)
Cheaper to manufacture 
b)
Stronger than similar products made from natural material
c)
Often better quality 
d)
All of the above
51.

Sandwich construction is used extensively _______________


I. in both the aerospace and commercial industries

II. it is extremely lightweight structural approach that

exhibits high stiffness and strength-to weight ratios.

III. The basic concept of a sandwich panel is that the facings

carry the shear loads , while the core carries bending

loads (tension and compression)

IV. Sandwich construction, especially honeycomb, is

extremely structurally efficient, particularly in stiffness

critical application.

a)

I, II, III

b)

I, II, IV

c)

I, III, IV

d)

II, III, IV

52.

Name type of core below

a)

Aluminum honeycomb

b)

Nomex honeycomb

c)

Carbon honeycomb

d)

Fiberglass honeycomb

53.

Below are the disadvantages of aluminum honeycomb EXCEPT....


I. Has a best combination of strength and stiffness.

II. It is difficult to make a major repair in the honeycomb.

III. It expensive and difficult to fabricate complex

assemblies.

IV. Offer superior performance compared to other

sandwich cores.

a)

I and II

b)

I and III

c)

I and IV

d)

II and III

54.

Two method of bonding advanced composite facings to core materials are used in fabricating sandwich structures.

a)

TRUE

b)

FALSE

55.

What is the correct label for A and B shown in the figure below?

a)

A - Tension; B- Compression

b)

A - Compression; B - Tension

c)

A - Torsion; B - Tension

56.

Increasing shearing force on a steel metal sheet results to lesser shear strain.

a)

True

b)

False

57.

This refers to the ratio of tensile stress to tensile strain.

a)

Bulk Modulus of elasticity

b)

Shear Modulus of Rigidity

c)

Young's Modulus of elasticity

58.

The design goal of composite materials is

a)

to be able to select the best material

b)

to be able to predict the reaction of material

c)

to incorporate the best characteristics of each of the component materials

d)

to understand the limits of a material

59.

Copper, titanium and nickel are the ________________ materials.

a)

polymer

b)

metal

c)

semiconductor

d)

composites

60.

Below are the example of polymers EXCEPT?

a)

Polycarbonate

b)

Polyethylene

c)

Silicon carbide

d)

Nylon