Materials

Question 1

(Ferrous) Mild Steel contents , properties , applications

Answer 1

C/ 0.3% carbon rest is iron
P/ Strong, Malleable, ductile
A/ Wire, Rivets, Nuts + bolts, pressing, girders, general workshop material

Question 2

(ferrous) Cast Iron contents , properties , applications

Answer 2

C/ 3.2-3.5% carbon rest iron
P/ weak tension, strong compression, fluid when molten
A/ machine beds, brake drums, manhole covers

Question 3

(ferrous) Stainless steel contents , properties , applications

Answer 3

C/ 1% carbon 27% chromium, 0.8% manganese rest iron
P/ corrosion resistant, strong and tough
A/kitchen equipment, surgical/medical instruments

Question 4

(non ferrous pure ) aluminium contents , properties , applications

Answer 4

C/ pure
P/ soft light malleable
A/ aircraft and vehicle components

Question 5

(non ferrous pure) copper contents , properties , applications

Answer 5

C/ pure
P/ ductile malleable good conductor of heat and electric
A/ water pipes, electronic wire + cable

Question 6

(non ferrous pure) lead contents , properties , applications

Answer 6

C/ pure
P/extremely soft, heavy malleable corrosion resistant
A/ roofs, tank linings, soft solder(alloyed with tin)

Question 7

(non ferrous alloy) Brass contents , properties , applications

Answer 7

C/ alloy of copper and zinc
P/ very ductile strong tough and molten fluidity
A/ tubes, pressings, forgings

Question 8

(non ferrous alloy) Pewter contents , properties , applications

Answer 8

C/ alloy of copper and tin and antimony
P/ malleable corrosion resistant, extremely soft low melting point
A/ jewellery, home/general decor

Question 9

(non ferrous alloy) solder contents , properties , applications

Answer 9

C/ alloy of lead + tin
P/ malleable, corrosion resistant, soft, low melting point
A/ electronics, plumbing, repairs

Question 10

(thermoset) epoxy resin properties

Answer 10

good heat resistance, hard wearing formed by mixing liquid resin a hardener

Question 11

(Thermoset) urea formaldehyde properties

Answer 11

high tensile strength, low water absorption, high surface hardness used in electrical appliances, used in resin for mdf sheets

Question 12

(Thermoset) polyester resin properties

Answer 12

good heat resistance, hard wearing, used in reinforced plastic composite, clothes

Question 13

(thermoplastic) acrylic properties

Answer 13

Excellent optical clarity + transparency highly resistant to temp variations
17 time impact resistance of glass

Question 14

(thermoplastic) polypropylene properties

thin

Answer 14

low density, light weight, flexible, high impact resistance

Question 15

(thermoplastics) HIPS
properties

Answer 15

easy to mould, light and strong, high impact and heat resistance

Question 16

(elastomer) rubber properties and uses

Answer 16

P/ abrasion and heat resistance, tensile strength, hardness, durable, flexible
A/ tyres, tubes, hoses, gloves

Question 17

(elastomer) neoprene properties

Answer 17

p/ abrasion and heat resistance, aging weather/sunlight, durable, flexible
A/ wet suits / diving suits, life jackets

Question 18

(elastomer) silicone properties and uses

Answer 18

P/ flexible, thermal / chemical resistance, electrical insulation. - cooking utensils