Common specialist technical principles- Unit 4 Flashcards

1
Q

What is a static load?

A

A load that does not move. For example a book resting on a table.

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2
Q

What is a dynamic load?

A

A load which does move. For example, a book being dropped on a table.

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3
Q

What should designers keep in mind when making a product, in terms of load?

A

They must make sure that the product can easily withstand the maximum anticipated stress in order to be safe and reliable.

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4
Q

What is tension?

A

Tension occurs when a pulling force is applied to either end of a material. The object will become stretched as it tries to withstand the force of being pulled apart.

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5
Q

Define tensile strength.

A

The ability of a material to resist being pulled apart.

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6
Q

What occurs when a pushing force is applied to either end of a material?

A

Compression.

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7
Q

What is torsion?

A

The two ends of a material rotating in opposite direction.

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8
Q

What is bending?

A

Tension and compression forces on either side of an object’s neutral axis.

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9
Q

What is the ability of a material to resist being bent out of shape?

A

Stiffness.

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10
Q

What is shear force?

A

A force that acts on an object in a direction perpendicular to it’s length.

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11
Q

What is an example of shear force?

A

Wind pushing up against a tree.

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12
Q

What does it mean to reinforce a material?

A

Strengthening a material or object by adding more material to it. Therefore it can better withstand force and stress.

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13
Q

Explain how a car tyre is designed to cope with different forces.

A

Every element of the rubber tyre has been reinforced. The tread is designed to last a long time and expel water. The side wall is layered to resist bumping into kerbs and collapsing under the cars weight. Steel belts are added to resist punctures from sharp objects.

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14
Q

What is reinforced concrete made from and what is it’s purpose?

A

It is made from concrete and steel and is used as a strong construction material.

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15
Q

Describe webbing.

A

A strong fabric woven into strips from yarns. It is used for car seat belts.

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16
Q

Why do people laminate paper?

A

To improve the paper’s strength and flexibility. When paper is laminated in a plastic pouch, it becomes water resistant and less prone to tearing.

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17
Q

What is fabric interfacing?

A

Used in textile garments as an additional layer to specific areas where extra shape/support is needed.

18
Q

What is the difference between fusible and sew-in interfacings?

A

Fusible is an iron-on interfacing technique. It uses heat to bond it to the surface of the fabric. Sew-in is put between the layers of the fabric and held together by stitching.

19
Q

What is folding and bending?

A

Material that is manipulated through reshaping can gain physical advantages. The curves of pipes increases the strength of the material while still keeping it lightweight.

20
Q

What are nets?

A

A flat 2D shape which can be folded to form a 3D object.

21
Q

Define carbon footprint and explain what it means to calculate one.

A

A carbon footprint is the amount of CO2 emitted during a certain process. Calculating a carbon footprint is a way of estimating the greenhouse gas emissions caused by a product, process, person, event or organisation.

22
Q

Describe ecological footprint.

A

A measure of the impact of a person’s life on the natural environment by quantifying the amount of the earth’s natural resources they use.

23
Q

What is a social footprint?

A

A measure of the impact of a company’s social polices.

24
Q

Give examples of company polices which align with a good social footprint.

A

“Are employees being paid a fair wage?”
“Is health and safety a primary concern?”

25
Q

What do we have in the UK which protects workers’ rights?

A

We have employment laws which ensure that contracts are always issued. Both parties know what is expected of them and can be held accountable in court if this is violated.

26
Q

What does HSE stand for and what is it’s purpose?

A

The Health and Safety Executive is an organisation which protects workers and enforces the Health and Safety at Work act.

27
Q

What are the ecological issues with harvesting raw materials?

A

Harvesting and refining raw materials are detrimental processes to the environment.

28
Q

What are the ecological issues associated with deforestation?

A

Deforestation is incredibly dangerous for the environment. The term slash and burn refers to the cutting down and setting on fire of trees. This means that the forest will not grow back, and considering 80% of the world’s forests have been cut down since 1990, this is a huge issue.

29
Q

What are the ecological issues associated with mining?

A

Mining can cause soil erosion, sinkholes, air pollution and water contamination.

30
Q

What are the ecological issues associated with drilling?

A

Boreholes can be drilled as deep as 12,000 meters, causing destruction for the environment.

31
Q

What are the ecological issues associated with farming?

A

Agriculture makes up for around 15% of the world’s greenhouse gas emissions.

32
Q

What are product miles?

A

The amount of CO2 emissions that each component of a product has caused through travelling.

33
Q

What is oceanic pollution?

A

Due to the increase in industrialisation and consumerism in the past 100 years, ocean waste has become a big problem. Causing devastation to the ecosystems and wildlife in the ocean. Sewage and oil spills also pollute the sea.

34
Q

What is atmospheric pollution?

A

The increase in industrialisation has caused a huge spike in greenhouse gas emissions.

35
Q

In order of best to worst, list the six Rs.

A

Refuse, rethink, reduce, reuse, repair and recycle.

36
Q

Describe one of the six Rs, refuse.

A

Refuse means to completely stop using products which are harmful for the environment. For example, walking instead of driving somewhere.

37
Q

Describe one of the six Rs, rethink.

A

Rethink means to question if a material or product is really necessary. It is about making informed decisions and redesigning when possible. For example, passengers may consider the impact of travelling by air and choosing a more sustainable transport option.

38
Q

Describe one of the six Rs, reduce.

A

Reduce means to save energy and materials by using more efficient processes. For example, reducing the complexity and number of parts to a product can make recycling easier for the consumer.

39
Q

Describe one of the six Rs, reuse.

A

Reuse is also known as primary recycling. It is when a product is used over and over again for the same purpose, instead of purchasing a new one. For example, glass milk bottles can be reused many times before it reaches the end of it’s useful life.

40
Q

Describe one of the six Rs, repair.

A

Repairing is extending a products lifetime in order to delay the purchase of a new one. For example, phones are expensive items which can be repaired to save the consumer buying a new one.

41
Q

Describe one of the six Rs, recycle.

A

Recycling is reprocessing the material using heat and chemicals to recover the recycled materials. For example, councils in Britain recycle nearly all household waste.

42
Q

What is the WEEE directive?

A

The Waste Electrical and Electronic Equipment recycling directive. It helps dangerous electric waste to be disposed of properly and for it to not cause harm to the environment.