1.2 Classification of Materials

Question 1

State the seven types of classification of material

Answer 1

Metals, woods, polymers, papers and boards, composites, smart materials, modern materials

Question 2

States the three classifications of metals

Answer 2

Ferrous, nonferrous, alloy

Question 3

Define a ferrous metal and give three examples

Answer 3

A metal containing mostly iron and carbon. Ferrous metals are magnetic and will rust

Low carbon steel, medium carbon steel, cast iron

Question 4

Define nonferrous and give three examples

Answer 4

A metal that does not contain iron, it’s not magnetic and does not rust

Aluminium, copper, zinc

Question 5

give three examples of each alloy (non ferrous and ferrous)

Answer 5

Ferrous metals = Stainless steel, die steel, high speed steel (HSS)
Non-ferrous alloys = Bronze, brass, duralumin, pewter

Question 6

State the three classifications of wood

Answer 6

Hardwood, softwood and manufactured boards

Question 7

Define hardwood and give three examples

Answer 7

A wood from broadleaved (deciduous) trees.

Oak, ash, mahogany, teak, birch, beech

Question 8

Define softwood and give three examples

Answer 8

Wood from a coniferous tree

Pine, spruce, redwood, Douglas fir, cedar, larch

Question 9

give three examples of manufactured boards

Answer 9

Plywood, chipboard, MDF, marine plywood, aero ply, flexible plywood

Question 10

State the three categorisations of polymers

Answer 10

Thermoplastics, thermosetting polymers, elastomers

Question 11

give three examples of a thermoplastic

Answer 11

LDPE, HDPE, PP, HIPS, ABS, PET, PVC, PMMA

Question 12

give three examples of thermosetting polymers

Answer 12

UF, MF, epoxy resin, polyester resin

Question 13

give three examples of an elastomer

Answer 13

Silicone, neoprene, natural rubber, polybutadience

Question 14

Describe papers and boards and give three examples

Answer 14

They are compliant materials meaning they can be scored, folded, and cut to form items such as nets for packaging

Layout paper, cartridge paper, tracing paper

Question 15

three types of composite material with examples

Answer 15

fibre-based, particle-based, or sheet based

Carbon fibre reinforced plastic (CFRP), glass fibre reinforced plastic (GRP) & concrete

Question 16

give three examples of a smart material

Answer 16

Shape memory alloys (SMA’s), Piezo electric materials, photochromic pigments

Question 17

give three examples of a modern material

Answer 17

Kevlar,
PMC,
high density modelling foam,
polymorph

Question 18

Safe working temperature

Answer 18

The temperature deemed safe for processing without possibleweakening of the polymer properties