Materials

Question 1

What is the eutectic temperature of Lead-Tin?

Answer 1

183 degrees Celsius

Question 2

What weight percent is the eutectic point of Lead-Tin?

Answer 2

62% Sn

Question 3

What is the eutectic temperature of Iron-Carbon?

Answer 3

1147 degrees

Question 4

What is the weight percent of the eutectic point for Iron-Carbon?

Answer 4

4.3%

Question 5

What percent does an Iron-Carbon phase diagram go to?

Answer 5

6.67%

Question 6

What is the eutectoid temperature of Iron-Carbon?

Answer 6

723 degrees

Question 7

What is the eutectoid percent for Iron-Carbon?

Answer 7

0.83%

Question 8

Low carbon carbon percentage

Answer 8

0.07% - 0.15%

Question 9

Mild carbon percentage

Answer 9

0.15% - 0.30%

Question 10

Medium carbon percentage

Answer 10

0.30% - 0.60%

Question 11

High carbon percentage

Answer 11

0.60% - 1.25%

Question 12

Ultra-high carbon percentage

Answer 12

1.25% - 2%

Question 13

Applications of low carbon steels

Answer 13

auto body parts and wire products

Question 14

Applications of mild carbon steels

Answer 14

structural plates and sections, stampings, forgings, seamless tubes, and boiler plates

Question 15

Applications of medium carbon steels

Answer 15

forgings and automotive components (chassis), including shafts, axles, gears, crankshafts

Question 16

What are 0.4% - 0.6% carbon steels used for

Answer 16

trains rails, wheels and axles

Question 17

Applications of high carbon steels

Answer 17

high-strength spring materials and wires, cutting tools, punches, dies, and industrial knives

Question 18

Applications of ultra-high carbon steels

Answer 18

highly tempered non-industrial knives, punches and axles

Question 19

What steels are weldable?

Answer 19

> 0.30% carbon

Question 20

What are the 6 types of thermoplastics?

Answer 20

polyethylene, polypropylene, acrylonitrile butadiene styrene (ABS), polylactic acid (PLA), polyvinyl chloride (PVC), nylon

Question 21

Mechanical properties of polyethylene

Answer 21

chemical resistance
impact resistance
stable in cryogenic environments

Question 22

Mechanical properties of polypropylene

Answer 22

translucent
chemical resistance
tough
durability
heat resistance

Question 23

Mechanical properties of ABS

Answer 23

rigid
impact resistance
insulating properties
abrasion and strain resistance
mechanically strong and stable over time
poor UV resistance

Question 24

Mechanical properties of PLA

Answer 24

biodegradable
weldability
chemical resistance
low heat resistance
low strength
difficult to machine

Question 25

Mechanical properties of uPVC

Answer 25

unplasticised PVC rigid UV resistance chemical resistance higher UTS durable

Question 26

Mechanical properties of PVC

Answer 26

less rigid high impact strength easier to mould lower temp resistance less resistant to chemicals lower UTS

Question 27

Mechanical properties of Nylon

Answer 27

lustrous elasticity very strong chemical resistance quick drying temp resistance high UTS

Question 28

Uses for LDPE

Answer 28

plastic containers/ bottles cable insulation crinkly plastic bags (lego pieces bag)

Question 29

Uses for HDPE

Answer 29

water pipes reusable plastic bags milk bottles chemical containers

Question 30

Uses for polypropylene

Answer 30

plastic containers reusable water bottles laboratory components outdoor furniture luggage car parts

Question 31

Uses for ABS

Answer 31

auto parts (dashes, bumpers) household electronics electrical appliances 3D printing materials power tool housing

Question 32

Uses for PLA

Answer 32

car interiors medical implants 3D printing filament cutlery and food containers

Question 33

Uses for uPVC

Answer 33

window/door frames gutters and other piping flooring

Question 34

Uses for PVC

Answer 34

car parts electronic and electrical equipment (wire insulation)

Question 35

Uses for Nylon

Answer 35

gears rollers bearings waterproof rope clothing

Question 36

How do you answer a long response question on certain composition steel?

Answer 36

correct sketch (1) identifies correct composition percent (1) 3 uses based on 3 mechanical properties (3)