material science

Question 1

define hardness

Answer 1

resistance of a material to localised plastic deformation

Question 2

define elasticity

Answer 2

ability of a deformed material body to return to its original form

Question 3

define viscosity

Answer 3

resistance to change its shape

Question 4

define malleability

Answer 4

physical property of a solid to bend or hammered into another shape

Question 4

Cu is what material what is it melting point

Answer 4

copper 1,085

Question 5

brass is an alloy of what two elements

Answer 5

copper and zinc

Question 6

box thing

Answer 6

circle corners

Question 7

covalent bonding

Answer 7

has one main circle and 4 helpers

Question 8

ionic bonding

Answer 8

has two main which share there last one

Question 9

thermosetting

Answer 9

lines with circles few ODD ones are coloured in

Question 10

thermoplastic

Answer 10

lines of blank circles and lines of coloured circles

Question 11

nickel properties

Answer 11

magnetic natural corrosion resistant

Question 12

copper

Answer 12

strength ,conductivity ,corrosion resistant, ductility, machinability

Question 13

describe what a composite material is and give an example

Answer 13

carbon- strand of carbon fibre- pre pregnated- with polyester epoxy resin and polyurethane

Question 14

list the elements chemically joined together to form the alloy stainless steel

Answer 14

iron chrominum nickel

Question 15

how as a food and drink maintenace engineer would you identify the sighns of creep within material

Answer 15

visual inspection demension changes structual integrety

Question 16

what effect would a refined grain structure promote the effects of creep

Answer 16

higher the grain size, lower the creep resistance

Question 17

what alloying element could you add to inhabit creep

Answer 17

chromium

Question 18

two non destructive techniques could you use to check for internal defects

Answer 18

ultrasonic testing radio graphic images test

Question 19

an izod impact test what is it does

Answer 19

impact resistance

Question 20

describe following heat treat ments what is anneling

Answer 20

heating material - soaking once reached correct temp and after the soak let it cool down

Question 21

heat treatment for hardening what is it

Answer 21

heating the material above critical temp after reching crit temp quench to rapidly cool which results in a hard/britle material

Question 22

heat treatment for normalising

Answer 22

heating to slightly above critical temp microstructure into austenitic cool it down in room temp air

Question 23

which is the fastest cooling medium used in hardening

Answer 23

water