Islamic University of Gaza Feb 13 2016 Unit 2 Material Technology Describing specific materials Language note Recycling Dr Hatem Elaydi IUG Spring 2016 ENGG 1305 2 What is meant by recycling ID: 690185
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Dr. Hatem ElaydiEngineering Technical EnglishIslamic University of GazaFeb. 13, 2016
Unit 2: Material Technology
Describing
specific materialsSlide2
Language note / RecyclingDr. Hatem Elaydi, IUG, Spring 2016, ENGG 13052What is meant by recycling?
How
does recycling affect engineering design?
Language note
magnetism
= force of attraction
galvanized
= coated with zinc (Zn) to prevent rusting
recyclable
= can be recycled
chromium
(Cr) and nickel
(Ni) = metals added to steel to make stainless steel
traces
= small quantities
scarcity
= limited availability /rarity Slide3
Language note …Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 13053insulation = both electrical insulation and thermal insulation
wire
= single strand of metal
scrap
= waste material intended for recycling
alloy
= a mixture of metals sometimes containing a non-metal, for example carbon (C) in steel
brass
= an alloy of copper (Cu), zinc and, often lead (
Pb
)
bronze
= an alloy of copper and tin (
Sn
)
melting
down
= using heat to change the state of a substance from solid to liquid
energy-intensive
= using a lot of energy Slide4
Language note …Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 13054electrolysis = passing an electrical current through a liquid or solid in order to separate chemical compounds
ore
= mineral from which metal is extracted
hardwood
= timber from deciduous trees
softwood
= timber from pine trees
ironmongery
= collective term for small metal items commonly used in buildings, for example door handles, hinges, screws, nails. Slide5
Independent Reading/ Q1aDr. Hatem Elaydi, IUG, Spring 2016, ENGG 13055Scrapping carsA lot of metal, notably steel, can be recycled. Intact parts can be recovered
and resold
. Oil, brake fluid and battery acid are potential pollutants which need to
be disposed
of carefully.
Tires
are more difficult to recycle
.
Recycling electronics
Heavy metals such as lead, cadmium and chromium are potential pollutants
and can
also be recovered for recycling. The process of recycling electronic
products is
quite difficult due to the difficulty of breaking up and separating very
small components
.Slide6
Independent Reading/ Q1a …Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 13056Breaking up shipsLarge amounts of steel can be recovered and recycled. Main pollutants are fuel
oil from
tanks and asbestos which was widely used as an insulation material
inside ships
.
Demolishing buildings
Structural steel can be recycled, concrete can be crushed and reused, for
example in
asphalt for road surfacing, copper in electrical wires can be recovered
and recycled
, good-quality bricks can sometimes be cleaned and reused. As with ships
, asbestos
is often found, requiring special precautions for its removal. The
main difficulty
is the time taken to demolish buildings meticulously.Slide7
2.A Read the following web page and complete the missing headings using the words in the box.Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 13057
Aluminum , Copper, Glass, Plastic, Rubber,
Steel
, Timber
Recyclable materialSlide8
Recyclable material …Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 13058 Answers
2 Glass
5
Timber
3 Copper
6
Rubber
4
Aluminum 7
PlasticSlide9
Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 13059
Answers
2
a,
3
b,
4
f,
5
d,
6
h,
7
e,
8 gSlide10
Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 130510
2C
Answers
2
with
6 of
3 from
7
of
4 from
8
from
5 withSlide11
Independent work Q3Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 130511lrina, an ecological adviser, is talking to a group of engineers on a training course
about environmentally
friendly design
.
In Groups,
discuss the
ideas from
her slide and give
some examples
.Slide12
Independent Work Q3bUse the CDs and Listen to an extract from the talk and compare your ideas with what lrina says. What example does she use to illustrate her main point
?
You can read Irina extract in the next two slides.
Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 1305
12Slide13
Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 130513Slide14
Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 130514Slide15
Independent Work Q3Clrina asks the engineers to do a simplifiedenvironmental audit. Their task is to compare steel and aluminum car bodywork from an ecological perspective.
Listen to Sophia and Pete, two of the engineers,
discussing the
topic and make notes of their ideas.
Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 1305
15Slide16
Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 130516
Independent work/ Q3Slide17
Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 130517Slide18
Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 130518Slide19
Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 130519Slide20
Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 130520Slide21
HW: In group, do an environmental audit for the following applications and materials. Use the words and phrases in the box.
Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 1305
21Slide22
Dr. Hatem Elaydi, IUG, Spring 2016, ENGG 130522