Question 1

The design review process determines _______
A) If the drawings will be available
B) If money will be committed
C) If CAD staff is available
D) None of the above

Accepted Answer

B

Question 2

Animation and kinematic analysis uses CAD data to determine __________
A) Whether the design will function properly before any parts are actually built
B) Whether the design is cost effective
C) How well parts will fit together
D) None of the above

Accepted Answer

Animation and kinematic analysis in CAD helps simulate the motion of parts to ensure the design functions properly before physical prototypes are made.

Question 3

What are Descriptive models?
A) A handwritten description only
B) A picture only
C) Either words or pictures
D) None of the above

Accepted Answer

Descriptive models can be represented using either words or pictures to describe a system or process.

Question 4

An analytical model captures
A) Structural form
B) Metallurgy of Model
C) Finite element analysis
D) None of the above

Accepted Answer

The answer of An analytical model captures
A) Structural form
B) Metallurgy...

Question 5

Finite Element Analysis (FEA) model is used to__________
A) Generate the stress plot
B) Generate the parts list
C) Generate the BOM
D) All of the above

Accepted Answer

FEA is primarily used to simulate and analyze physical phenomena, such as stress, strain, and deformation, in engineering structures. It is not used for generating parts lists or bills of materials (BOM).

Question 6

What are the qualities that can make models more or less useful?
A) Visual (presenting information graphically)
B) Understandable (contain detail in a format suited to the audience)
C) Flexible (allow quick and easy updates and changes)
D) All of the above

Accepted Answer

All the qualities listed (visual, understandable, and flexible) contribute to making models more useful by enhancing clarity, adaptability, and ease of comprehension for the intended audience.

Question 7

Paper drawings can be very effective for_____________
A) Quickly communicating the design of small parts for manufacturing
B) Never using paper drawings
C) Always using a 2 pencil
D) None of the above

Accepted Answer

Paper drawings are effective for quickly communicating the design of small parts for manufacturing because they provide a tangible and easily understandable representation of the design.

Question 8

An advantage of 2D CAD drawings is they ________.
A) Can quickly be printed to different scales
B) Can be separated onto different layers
C) Can query the database and the information
D) All of the above

Accepted Answer

2D CAD drawings can be printed to different scales, separated onto different layers, and can query the database for information, making all options correct.

Question 9

Descriptive geometry is _____________________________
A) A written description of a solid model
B) is the study of producing views of an object that show true lengths, shape, angles, and other information about an engineering design
C) A scaled-down hand drawing
D) None of the above

Accepted Answer

Descriptive geometry is the branch of geometry that allows the representation of three-dimensional objects in two dimensions, by using a specific set of procedures to produce views that accurately depict the object's dimensions and spatial relationships.

Question 10

What best describes "constraint-based modeling"?
A) Mechanical supports for the physical model
B) Relationships that defined parts of a 2D model that are maintained by the software when you make changes to the drawing
C) A system that can be used only on 2D drawings
D) None of the above

Accepted Answer

Constraint-based modeling involves defining relationships between parts of a model, allowing the software to maintain these relationships when changes are made.

Question 11

Physical models provide a difficult visual reference.

Accepted Answer

Physical models are often used because they provide an easy and tangible visual reference for understanding complex structures or systems.

Question 12

A 3D CAD model offers all the benefits of a 2D model and a physical model.

Accepted Answer

A 3D CAD model combines the advantages of both 2D models (accuracy, precision, and ease of modification) and physical models (realistic representation and ability to visualize the object from different angles).

Question 13

Virtual reality (VR) refers to interacting with a 3D CAD model as if it were real-the model simulates the way the user would interact with a real device or system.

Accepted Answer

Virtual reality involves creating a simulated environment that can mimic real-world interactions, allowing users to engage with 3D models as if they were real.

Question 14

The term virtual prototype describes 2D CAD systems.

Accepted Answer

Virtual prototypes refer to 3D digital models used for simulation and testing, not 2D CAD systems.

Question 15

A 3D wireframe can be useful for piping layout around other 3D equipment,

Accepted Answer

A 3D wireframe model allows designers to visualize and plan the routing of pipes in relation to other equipment, ensuring efficient use of space and avoiding clashes.

Question 16

Wireframe models always include surfaces that can be shaded.

Accepted Answer

Wireframe models represent objects using lines and curves without defining surfaces, so they do not inherently include surfaces that can be shaded.

Question 17

CAD surface models define a shape by storing its surface information.

Accepted Answer

CAD surface models represent objects by defining their surfaces, capturing the shape and contours without detailing the interior volume.

Question 18

Storing the definitions of the surfaces in the CAD digital database is termed boundary representation (BREP).

Accepted Answer

Boundary representation (BREP) is a method in computer-aided design (CAD) that represents shapes using their spatial boundaries, such as surfaces, edges, and vertices, and stores these definitions in a digital database.

Question 19

Triangulated Irregular Networks (TINs) are used in 2D flat plan layouts.

Accepted Answer

TINs are used to represent 3D surfaces, not 2D flat plan layouts. They model terrain or other surfaces by dividing them into triangles.

Question 20

A NURBS surface is defined by a set of vertices in 3D space that are used to define a smooth surface mathematically.

Accepted Answer

A NURBS (Non-Uniform Rational B-Splines) surface is indeed defined by control points (vertices) in 3D space, which influence the shape of the smooth surface through mathematical equations.

Quiz 5: Modeling and Refinement

The design review process determines _______

Animation and kinematic analysis uses CAD data to determine __________

What are Descriptive models?

An analytical model captures

Finite Element Analysis (FEA) model is used to__________

What are the qualities that can make models more or less useful?

Paper drawings can be very effective for_____________

An advantage of 2D CAD drawings is they ________.

Descriptive geometry is _____________________________

What best describes "constraint-based modeling"?