Topic 2

Question 1

What are 5 properties of metals?

Answer 1

• good conductors
• not transparent
• lustrous
• strong yet deformable
• durable

Question 1

What are 4 properties of ceramics?

Answer 1

• good insulators
• resistant to high temperatures and harsh environments
• hard
• brittle

Question 2

what are 3 properties of polymers?

Answer 2

• low density
• flexible
• durable

Question 3

What are the 9 mechanical material properties?

Answer 3

• strength
• stiffness
• toughness
• elasticity
• plasticity
• ductility
• brittleness
• hardness
• wear resistance

Question 4

What is brittleness?

Answer 4

when a material breaks with little or no deformation

Question 5

What are 2 materials that are brittle?

Answer 5

• glass
• acrylics

Question 6

What is compressive strength?

Answer 6

a measure of the maximum crushing stress a material can endure before failure

Question 7

What are 3 materials with high compressive strength?

Answer 7

• steels
• concrete
• ceramics

Question 8

What is ductility?

Answer 8

the ability of a material to be permanently deformed without breaking

Question 9

What are 2 materials that are ductile?

Answer 9

• aluminium
• mild steel

Question 10

What are 3 materials that are hard?

Answer 10

• high carbon steel
• glass
• concrete

Question 11

What is stiffness?

Answer 11

A measure of a materials ability to resist elastic deformation

Question 12

What are 3 materials that are stiff?

Answer 12

• high carbon steel
• ceramics
• glass

Question 13

What is tensile strength?

Answer 13

A measure of the maximum pulling stress a material can endure before failure

Question 14

What are 2 materials with high tensile strength?

Answer 14

• steels
• fibreglass

Question 15

What is toughness?

Answer 15

the ability of a material to withstand shock or impact, absorb energy and plastically deform without fracturing

Question 16

What are 3 materials that are tough?

Answer 16

• low carbon steel
• nickel
• rubber

Question 17

Up until what point is stress proportional to strain on the stress vs strain graph?

Answer 17

proportional limit

Question 18

what does the yield point indicate?

Answer 18

the limit of elastic behaviour and the beginning of plastic behaviour

Question 19

in materials, the crystals that form in liquid during freezing are called…?

Answer 19

dendrites

Question 20

if a microstructure from a binary isomorphous phase diagram has 32% solid nickel. What percent of solid is copper?

Answer 20

68%

Question 21

When does the output of an AND gate 1?

Answer 21

when both inputs=1

Question 22

When does the output of a NAND gate 1?

Answer 22

Every time except for when both inputs=1

Question 23

When does the output of an OR gate = 1?

Answer 23

Every time except for when both inputs=0

Question 24

When does the output of a NOR gate =1?

Answer 24

when both inputs = 0

Question 25

When does the output of an XOR gate =1?

Answer 25

when the inputs are opposite to one another

Question 26

When does the output of an XNOR gate =1?

Answer 26

when both inputs = 1 or both inputs=0

Question 27

what does an inverter gate do?

Answer 27

the output is the opposite to the input

Question 28

what is the % carbon in low carbon steel?

Answer 28

0.07-0.15% carbon

Question 29

What are 2 uses of low-carbon steel?

Answer 29

• automobile parts
• wire products

Question 30

what is the % carbon in mild carbon steel?

Answer 30

0.15-0.3% carbon

Question 31

what are 4 uses of mild carbon steel?

Answer 31

• structural plates and sections
• stampings
• forgings
• machine frameworks

Question 32

what is the % carbon in medium carbon steel?

Answer 32

0.3-0.6% carbon

Question 33

what are 3 uses of medium carbon steel?

Answer 33

• automotive components
• hardware e.g bolts, studs
• machine components

Question 34

what is the % carbon in high carbon steel?

Answer 34

0.6-1.25% carbon

Question 35

what are 5 uses of high-carbon steel?

Answer 35

• cutting tools
• files
• drill bits
• punches
• industrial knives

Question 36

what is the % carbon in ultra-high carbon steel?

Answer 36

1.25- 2% carbon

Question 37

what are 3 uses of ultra-high carbon steel?

Answer 37

• non-industrial purpose knives
• punches
• axles

Question 38

what type of plastic could a plastic container be made of?

Answer 38

polyethylene

Question 39

what type of plastic could lab equipment be made of?

Answer 39

polypropylene

Question 40

what type of plastic could a car bumper be made of?

Answer 40

(ABS) acrylonitrile butadiene styrene

Question 41

what type of plastic could medical implants be made from?

Answer 41

polylactic acid

Question 42

what type of plastic could water/drainage pipes be made from?

Answer 42

(PVC) polyvinyl chloride

Question 43

what type of plastic could gears, rollers and bearings be made from?

Answer 43

nylon

Question 44

what are 3 applications of polyethylene?

Answer 44

• plastic containers
• water pipes
• cable insulation

Question 45

what are 3 applications of polypropylene?

Answer 45

• lab equipment
• electronics
• automobile products

Question 46

What are 3 applications of Acrylonitrile butadiene styrene (ABS)?

Answer 46

• automotive body parts
• electrical appliances
• automobile parts

Question 47

what are 2 applications of polylactic acid?

Answer 47

• automobile interiors
• medical implants

Question 48

what are 3 applications of polyvinyl chloride (PVC)?

Answer 48

• electronic equipment
• water/waste pipes
• furniture

Question 49

what are 3 applications of nylon?

Answer 49

• gears
• rollers
• bearings