Materials

Question 1

What is Compression?

Answer 1

Forces that tend to crush.

Question 2

What is Tension?

Answer 2

Forces that tend to stretch.

Question 3

What is Torsion?

Answer 3

Forces that tend to twist.

Question 4

What is Deflection?

Answer 4

Forces that tend to bend.

Question 5

What is Shearing?

Answer 5

Forces that to cut.

Question 6

What are Constraints?

Answer 6

Forces that deform parts.

Question 7

What are Mechanical Properties?

Answer 7

Physical properties that a material exhibits upon the application of forces.

Question 8

What is Hardness?

Answer 8

Ability to resist indentation or abrasion.

Question 9

What is Elasticity?

Answer 9

Ability to return to it’s original form after under going a constraint.

Question 10

What is Resillience?

Answer 10

Ability to resist shocks without breaking.

Question 11

What is Ductility?

Answer 11

Ability to be stretched without breaking.

Question 12

What is Malleability?

Answer 12

Ability to be flattened or bent without breaking.

Question 13

What is Stiffness?

Answer 13

Ability to maintain their shape when subjected to various constraints.

Question 14

What is a Elastic Deformation?

Answer 14

A temporary change in the shape or dimensions of the material, which returns to it’s original form once the constraint is removed.

Question 15

What is a Plastic Deformation?

Answer 15

A permanent change in the shape or dimensions, which stays deformed after the constraint is removed.

Question 16

What is a Fracture Deformation?

Answer 16

The constraint is so intense the material breaks.

Question 17

What is Resistance to Corrosion?

Answer 17

Ability to resist the effects of rust formatting.

Question 18

What is Electrical Conductivity?

Answer 18

Ability to carry an electrical current.

Question 19

What is Thermal Conductivity?

Answer 19

Ability to transmit heat.

Question 20

What are the two types of plastics?

Answer 20

Thermoplastic and Thermosetting.

Question 21

What are Thermoplastics?

Answer 21

Plastics that can be heated to soften and be shaped over and over again. They also harden when cooled.

Question 22

What are the properties of Thermoplastics.

Answer 22

Elasticity
Resilience
Resistance to Corrosion.

Question 23

What are Thermosetting plastics?

Answer 23

Plastics that can be heated and shaped once and always remain hard, even in heat.

Question 24

What are the properties of Thermosetting plastics?

Answer 24

Hardness
Resilience
Heat Resistance
Stiffness

Question 25

What are the two types of wood?

Answer 25

Wood and Modified Wood.

Question 26

What are the properties of wood?

Answer 26

It's hard and durable Has good elasticity (depends on the type of wood) Has low thermal and electrical conductivity. Has many colours and shapes.

Question 27

What are the three varieties of modified wood?

Answer 27

Plywood Particleboard Fibreboard

Question 28

Why does wood deteriorate quickly?

Answer 28

Because it's organic.

Question 29

What are some ways of protecting wood?

Answer 29

Varnishing Painting Wood Wax (optional answer) Chemical treatment (optional answer)

Question 30

What are some examples of ceramics?

Answer 30

Glass Mugs Plates

Question 31

What are the properties of Cermics?

Answer 31

Low electrical conductivity High degree of hardness Resistant to corrosion Fragile Heat Resistant and low thermal conductivity

Question 32

Generally ceramics are very durable, however what causes them to degrade?

Answer 32

Acids and thermal shocks.

Question 33

What are some ways of protecting ceramics?

Answer 33

Storage of materials in temperature. Dry areas can help preserve ceramics.

Question 34

What are the two types of alloys?

Answer 34

Ferrous Non-Ferrous

Question 35

What is a Ferrous Alloy?

Answer 35

An alloy that's main component is iron.

Question 36

What is a non-ferrous alloy?

Answer 36

Main component is not iron.

Question 37

What causes metals to degrade?

Answer 37

Oxidation (rusting)

Question 38

What can be used to protect metals?

Answer 38

Metallic coatings Paint Grease Steel heat treatment

Question 39

What is Drilling?

Answer 39

To make a hole in a material.

Question 40

What does Drilling depend on?

Answer 40

The diameter of the hole Speed of the drill bit

Question 41

What is Tapping?

Answer 41

Screw threads inside the hole.

Question 42

What is Threading?

Answer 42

Screw threads that are etched or formed outside of a rod.

Question 43

What is Bending?

Answer 43

The process by which a material is pressed into shape.

Question 44

What is the first step in the manufacturing process?

Answer 44

Measuring and Laying out.

Question 45

What are the steps of Machining?

Answer 45

Cutting Drilling Tapping Threading Bending Inspecting

Question 46

What is the third step in the manufacturing process?

Answer 46

Assembling and Finishing.

Question 47

What are the steps of Assembling?

Answer 47

Screwing Nailing Bonding Bolting Riveting Welding

Question 48

What is Bonding?

Answer 48

Joining of two materials together.

Question 49

What is Welding?

Answer 49

To fuse two or more parts using heat.

Question 50

What are the steps in Finishing?

Answer 50

Painting Staining Varnishing Polishing

Question 51

What is the name of the machine used to cut the wood?

Answer 51

Band Saw

Question 52

What is the name of the machine that drills holes into wood?

Answer 52

Drill Press