Module 1

Question 1

What is a composite material?

Answer 1

A composite material is a material that is made up of two or more constituent materials with significantly different physical or chemical properties. AND when combined, produce a material with characteristics different from the original individual components.

Question 2

The difference between thermoset and thermoplastic polymer

Answer 2

thermoplastics can be re-softened by applying heat and have simple addition structures. thermoset cannot be re-softened by heating and unlike thermoplastics, thermosets often have a stronger network structure.

Question 3

Composite materials are classified based on:
(a) Type of matrix
(b) Size-and-shape of reinforcement
(c) Both a and b
(d) None

Answer 3

Answer is C

Question 4

Al-alloys for engine/automobile parts are reinforced to increase their (a) Strength (b) Wear resistance (c) Elastic modulus (d) Density

Answer 4

Answer is B

Question 5

what are the two different ways polymers form

Answer 5

diagrammatical representation and chemical representation

Question 6

Mechanical properties of fibre-reinforced composites depend on
(a) Properties of constituents
(b) Interface strength
(c) Fibre length, orientation, and volume fraction
(d) All the above

Answer 6

Answer is D

Question 7

The following material can be used for filling in sandwich structures
(a) Polymers
(b) Cement
(c) Wood
(d) All

Answer 7

Answer is D

Question 8

name three thermoplastic polymers

Answer 8

nylon, polycarbonate, polyethylene, arcylic ,polypropylene, teflon, PVC

Question 9

would a car contain any composite materials?

Answer 9

yes, it would contain composite materials such as carbon fiber and even fiberglass, the composite material is also used to make the car lighter and stronger.

Question 10

what is condensation polymerisation

Answer 10

the monomers join together to form a by-product, the process involves two phenol monomers joining with a formaldehyde monomer join to make bakelite.

Question 11

what words does polymer come from

Answer 11

poly: meaning many , mer: meaning the smallest repeating unit f the polymer material.

Question 12

what are the two ways monomers join

Answer 12

addition polymerisation and condensation polymerisation.

Question 13

what is addition polymerisation

Answer 13

2 or more monomers which are the same connect to form the polymer

Question 14

what are co-polymers

Answer 14

polymers formed by connecting different monomers.

Question 15

what are polymers

Answer 15

polymers are solid materials made of long molecular chains that are created by connecting small molecules.

Question 16

polymer formation falls under which two catergories

Answer 16

thermoplastics, thermosets

Question 17

which has stronger covalent bonds; thermosets or thermoplastics

Answer 17

thermosets

Question 18

how are polymers formed

Answer 18

polymers are formed by linking smaller molecules known as monomers.

Question 19

what words does monomers come from

Answer 19

mono=one, mer=part

Question 20

what is a monomer

Answer 20

a molecule that can be boned to other identical molecules to form a polymer.

Question 21

Why do we use composites?

Answer 21

We use composites because it combines the strength of the materials and it is lighter.

Question 22

Name three different examples of synthetic polymers?

Answer 22

Plastic containers, Plastic bottles, and non-stick frypan.

Question 23

Name three different examples natural polymers?

Answer 23

DNA, Silk, and Wool