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Question 1

ratio of the object’s mass to its volume

Answer 1

density

Question 2

commonly used in manufacturing and have lower density

Answer 2

alloy

Question 3

averages 494lbs per cubic ft while stainless is a bit less

Answer 3

steel

Question 4

half density of steel and aluminum is about ⅓

Answer 4

titanium

Question 5

importance of knowing the density of metals:

Answer 5

identification
manufacturing
quality control
engineering
recycling

Question 6

solid to liquid

Answer 6

melting point

Question 7

importance on why melting point is important

Answer 7

manufacturing
allow development
material selection
safety

Question 8

amount of energy needed to change the temperature of a material

Answer 8

heat capacity

Question 9

key component in predicting casting solidification

Answer 9

thermal property

Question 10

heat transported to a material

Answer 10

thermal conductivity

Question 11

draw heat from electrical components to cool them

Answer 11

heat sinks

Question 12

response to a change of temperature

Answer 12

thermal expansion

Question 13

effects of change in temperature

Answer 13

shape
area or
volume

Question 14

need to consider when designing tooling for metal casting

Answer 14

thermal exapansion

Question 15

allows a material to pass through it

Answer 15

electrical conductivity

Question 16

applications of electrical conductivity

Answer 16

electrical wiring
electronics
heating

Question 17

material response to an applied external magnetic field

Answer 17

magnetic property

Question 18

is the strongest type of magnetism which exhibited by an iron

Answer 18

ferromagnetism

Question 19

example of ferro magnetism

Answer 19

electrical transformer
hard disk drive

Question 20

amount of light that reflects on the metal

Answer 20

luster

Question 21

application of luster

Answer 21

jewelry
reflective coatings
lighting
automotive industrial finishes
architecture

Question 22

how much force an object can withstand without breaking or bending

Answer 22

strength

Question 23

tells manufacturers how much material must be used to meet a specific strength requirement

Answer 23

strength to weight ratio

Question 24

strength is often measure in terms of material’s response to stresses or applied forces in 3 configurations:

Answer 24

compresion
tension
shear

Question 25

volume of material reduces

Answer 25

compression stress

Question 26

coplanar with crosssection of material

Answer 26

shear stress

Question 27

force pulling in opposite directions

Answer 27

tension stress

Question 28

pulling apart until failure occur

Answer 28

tesile testing

Question 29

crushing until failure occur

Answer 29

compressing test

Question 30

repeated twisting motion

Answer 30

torsion testing

Question 31

force applied to an object

Answer 31

stress

Question 32

stress increases, strain increases

Answer 32

true

Question 33

material response to tensile stress

Answer 33

ductility

Question 34

response to compressive stress

Answer 34

malleability

Question 35

deform plastically and absorb energy before fracture

Answer 35

tougness

Question 36

key to a toughness

Answer 36

balance between strength and ductility

Question 37

cyclical stress without fracturing or permanently deforming

Answer 37

fatigue resistance

Question 38

resistance to deformation scratching cutting

Answer 38

hardness

Question 39

done by pressing a sphere made of carbide or hardened steel into the surface9f the part being measured

Answer 39

brinell hardness

Question 40

given as the load divided by the surface area of the identation

Answer 40

brinell hardness number

Question 41

metals that reacts with oxygen

Answer 41

metal oxides

Question 42

metals donate electrons to oxygen

Answer 42

metal oxides

Question 43

material is reduced to more stable state via chemical reaction

Answer 43

corrosion

Question 44

to resist corroding forces

Answer 44

corrosion resistance

Question 45

metal from least to most resistant in corrosion

Answer 45

carbon galvanized aluminum stainless red metals

Question 46

gangue particles are lighter than the ore

Answer 46

hydraulic washing

Question 47

used for oxides and carbonate ores

Answer 47

hydraulic washing

Question 48

passed through stream of water

Answer 48

hydraulic washing

Question 49

used for sulfide ores

Answer 49

froth floatstion method

Question 50

crushed ore and water are added to a tank in which a frother such as pine oil is added and air is blownunder pressure to create the froth

Answer 50

froth floatation method

Question 51

used whenmetal or gangue particle have magnetic property

Answer 51

magnetic separation

Question 52

passed over conveyor belt with magnetic rollers

Answer 52

magnetic separation

Question 53

used when ore is soluble in q solvent

Answer 53

leaching method

Question 54

crushed ore is treated with a solvent that dissolves the ore leaving behind the impurities

Answer 54

leaching method

Question 55

heating of concentrate metal ore in presence of air

Answer 55

roasting

Question 56

heating of concentrated metal ore in a limited supply of air used for metal carbonates of metal hydroxides

Answer 56

calcination

Question 57

using a reducing agent

Answer 57

reduction

Question 58

impure metal is made at the anode while pure metal is made at the cathode using metal salt solution as electrolyte

Answer 58

electrolytric refining

Question 59

ions present in the epectrolytes get reduced in the cathodeand get oxidized at the anode

Answer 59

electrolysis of molten ore

Question 60

iron

Answer 60

pure element occurs naturally easily gets oxidized weaker and more brittle more ductile

Question 61

steel

Answer 61

an alloy man-made less tendency to get oxidized stronger and harder less ductile

Question 62

maximum carbon content of 0.008% weight of carbon

Answer 62

pure iron

Question 63

0.008 to 2.14% carbon content

Answer 63

steel

Question 64

greater than 2.14%

Answer 64

cast iron

Question 65

types of ferrous alloys on phase diagram

Answer 65

pure iron steel cast iron

Question 66

has body centered cubic structure exists at low temperature and low carbon weight stable at room temperature magnetic below 768°C

Answer 66

a-ferrite

Question 67

has face centered cubic structure unstable at temperature below eutectic temperature (727°C) unless cooled rapidly non magnetic

Answer 67

y-ferrite

Question 68

has similar structure as a-ferrite but exist only qt high temperature melting point: 1538°C

Answer 68

delta ferrite

Question 69

hard and brittle decomposes extremely slowlyat room temperature in graphite

Answer 69

cementite

Question 70

liquid solution of iron carbon as carbon increase in an alloy the melting point decreases

Answer 70

Fe- C liquid solution

Question 71

upper limit of the ferrite/ cementite phase field

Answer 71

A1

Question 72

temperature where iron loses its magnetism(769°C)

Answer 72

A2

Question 73

points where multiple phases meet

Answer 73

eutectic points

Question 74

points meeting in eutectic point

Answer 74

A1 A3 Acm