topic 3: Modelling

Designing parts of a product individually then assembling them together later is known as...

• A. Top-down modelling

• B. Join together later modelling

• C. Bottom-up modelling

• D. Assembly modelling

Answer explanation

Bottom-up modelling involves designing parts individually and then assembling them together later, which aligns with the given scenario.

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

• A. Market analysis

• B. Finite element analysis (FEA)

• C. Life cycle analysis (LCA)

• D. Work flow analysis

Answer explanation

Finite Element Analysis (FEA) is used to simulate unknown factors like stresses in products by dividing the product into smaller elements for analysis.

What type of model exists in the mind and is used to help us know and understand ideas?

• A. Concept model

• B. Data model

• C. Aesthetic model

• D. Physical model

Answer explanation

The correct choice is A. Concept model, which is a type of model that exists in the mind and is used to help us know and understand ideas.

Virtual reality is increasingly being used in design and development to simulate product interaction. Sometimes this is used in relation to tools that allow designers and testers to 'feel' the virtual environment. Which of the following best describes a technology that simulates the sense of touch?

• A. Accelerometer

• B. Movement sensor

• C. Haptic

• D. Vibration motors

Answer explanation

Haptic technology simulates the sense of touch, allowing users to feel the virtual environment, making it the best choice for simulating touch in virtual reality design and development.

In computer-aided design (CAD), when a model is created that has no interior material and is just a visual representation of the final product, this is considered as a…

• A. Bottom up model

• B. Surface model

• C. Solid model

• D. Top down model

Answer explanation

In CAD, a model with no interior material is a surface model, focusing on the external appearance. It lacks the solid structure of a solid model.

What rapid prototyping process uses lasers to solidify layers from a liquid resin?

• A. Stereolithography (SLA)

• B. Fused deposition modelling (FDM)

• C. Selective laser sintering (SLS)

• D. Laminated object manufacturing (LOM)

Answer explanation

Stereolithography (SLA) is the rapid prototyping process that uses lasers to solidify layers from a liquid resin.

Prototyping objects using plastic powder deposition is known as…

• A. laminated object manufacturing (LOM)

• B. fused deposition modelling (FDM)

• C. stereolithography

• D. selective laser sintering (SLS)

Answer explanation

Prototyping objects using plastic powder deposition is known as selective laser sintering (SLS), making option D the correct choice.

Which of the following processes, commonly used in video games and animated movies, uses magnetic markers or LEDs to create a digital image of a person?

• A. Data modelling

• B. Statistical modelling

• C. Motion capture

• D. Virtual prototyping

Answer explanation

Motion capture is the process that commonly uses magnetic markers or LEDs to create a digital image of a person in video games and animated movies.

Clay models, scale models and prototypes are all examples of which type of modelling?

• A. Physical modelling

• B. Graphical modelling

• C. Functional modelling

• D. Conceptual modelling

Answer explanation

Clay models, scale models, and prototypes are physical objects, making them examples of physical modelling.

Selective laser sintering can use a range of powdered materials to create products. These materials include…

• A. Plastic, metal and glass

• B. Ceramics, textiles and wood

• C. Plastic, wood and composites

• D. Metal, textiles and ceramics

Answer explanation

Selective laser sintering can use plastic, metal, and glass as powdered materials to create products, making option A the correct choice.