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Topic 3 - Modelling

Question 1

SLPaper 1

What type of prototype is designed to collect quantitative data to help inform development?

Question 2

SLPaper 1

Figure 3 shows people in a museum. By interacting with the exhibit they are able to understand how the image displayed on the screen feels.

Figure 3: People interacting with an exhibit in a museum

[Source: image provided with kind permission from Christopher Dean]

Which technology enables the people to understand what the image feels like through their sense of touch?

Question 3

HLPaper 1

Which of the following rapid prototyping techniques does not require structural supports during the build?

Question 4

HLPaper 1

Which type of analysis would you use to simulate unknown factors, such as stresses within a joint, in products?

Question 5

HLPaper 1

Which of the following describes a conceptual model?

I. A model that is used to help us develop and understand ideas

II. A scale or full-size representation of a product used to gain feedback from users

III. Photorealistic computer-aided design (CAD)-based interactive models

Question 6

SLPaper 2

Zuperzozial is a Dutch company that manufactures a range of kitchenware (plates, cups, servingutensils, and vessels) from biodegradable bioplastic that is made from renewable resources (suchas, corn, sugar cane and grain), see Figure 14.

The environmentally conscious kitchenware is stylish and durable. It also has a similar weight,feel, performance and dimensions to existing ceramic products. Zuperzozial are distributingtheir product through specialist kitchen stores, where they are displayed alongside conventionalkitchenware. Zuperzozial needs to sell the kitchenware at a slightly higher cost than conventionalkitchenware to recover the cost of the new technology used to manufacture using bioplastics.

1.

Outline one psychological factor the Zuperzozial kitchenware’s designers needto consider.

[2]
2.

Explain one physical property that the material used in the Zuperzozial kitchenwareneeds to possess.

[3]
3.

Explain one advantage of using Finite element analysis (FEA) and one advantage ofusing physical models for testing the Zuperzozial kitchenware.

[6]
4.

Explain how Rogers’ characteristics of relative advantage, compatibility andobservability help in the diffusion of the Zuperzozial kitchenware.

[9]

Question 7

SLPaper 2

The design of a car is a process that has many stages. As a result, there can be a large numberof prototypes and drawings used.

Some car designers are still using clay to make their first prototype of a new model of car,see Figure 3.

1.

List one reason why clay modelling is still used to prototype models in processessuch as car design.

[1]
2.

Describe the difference between surface and solid modelling.

[2]
3.

Outline why isometric drawings are often used in car design.

[2]
4.

Explain why digital humans are used in car interior design.

[3]

Question 8

SLPaper 2

Some villages near Siem Reap in Cambodia have problems with waste, in this case plastic bags,polluting the landscape.

Salin and Michael of the Treak Community Centre near Siem Reap have developed an innovativeway of dealing with the issue of plastic bag waste.

Plastic bags collected by the Treak community are placed on a bed of sand that is heated by afire. This shrinks the bags and makes them stiffer. The bags are then shredded into small chunkswith scissors, see Figure 10. The shredded plastic is then used as a substitute for aggregate inconcrete which is mixed by hand, see Figure 11. This concrete is then moulded into bricks, seeFigure 12 and Figure 13, that can be used for construction.

40 % of the bricks used for the Treak Community Centre were made using this method. Theremaining 60 % of bricks are standard clay construction bricks.

1.

Outline why these bricks are an example of a composite material.

[2]
2.

Explain why prototypes would be used in the testing and evaluation of the brick madeby the Treak community.

[3]
3.

Designers use specifications to guide development and evaluation. Suggest the costconstraints and material requirements for the Treak Village plastic brick.

[6]
4.

Explain how the manufacture of the Treak Village plastic brick addresses the greendesign objectives of materials, energy and waste.

[9]

Question 9

HLPaper 1

What is an advantage of rapid prototyping for the designer?

Question 10

SLPaper 2

Drones have become more widespread and can be used for leisure, business or militarypurposes. A drone is operated using a handset, see Figure 7.

Figure 7: A drone and its handset

1.

List two reasons why temporary joining techniques are used when a droneis assembled.

[2]
2.

Explain why finite element analysis (FEA) would be used in the development ofthe drone.

[3]
3.

Explain two ways that drones can become obsolete.

[6]
4.

Explain how the study of human factors can be used to improve the comfort, safety and performance of the handset that controls the drone.

[9]
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