Mixed Deck — All CAD Topics Flashcards

Modem CAD systems are based on?

Answer: ICG

ICG is interactive computer graphics. It denotes a user-oriented system in which computer is used to create, transform and display data in pictorial or symbolic forms.

What is an external reference (XREF) in CAD, and why is it used?

Answer: A drawing file attached to the current drawing that updates automatically when the source file changes

XREFs allow multiple drawings to reference a common base file (such as a floor plan) so all dependent drawings update automatically when the base is modified.

In a CAD motion simulation, what property describes resistance to change in rotational velocity around an axis?

Answer: Moment of inertia

Moment of inertia measures how mass is distributed relative to a rotational axis and determines how much torque is needed to change angular velocity.

In Computer-Aided Design, what does "resolution" refer to in digital design?

Answer: The number of pixels per unit of measurement, determining image clarity

Resolution refers to the density of pixels (measured in PPI/DPI), with higher resolution providing greater detail and clarity. Standard screen resolution is 72 PPI, while print typically requires 300 DPI.

What does mesh convergence testing verify in FEA?

Answer: That results stabilize as element size decreases

Mesh convergence testing confirms that refining the mesh no longer significantly changes the results, ensuring numerical accuracy.

What is the relationship between theory and practice in Computer-Aided Design rendering techniques?

Answer: Theory provides the foundation and framework that guides effective practical application

Theory and practice are complementary: theoretical knowledge provides the conceptual framework and understanding that guides effective, evidence-based practical application in professional settings.

In Computer-Aided Design, what role does continuing education play in file formats and standards?

Answer: To keep professionals current with evolving standards, technologies, and best practices

Continuing education ensures professionals stay current with new developments, evolving standards, and emerging best practices in their field, maintaining competence throughout their careers.

In Computer-Aided Design, what does "resolution" refer to in digital design?

Answer: The number of pixels per unit of measurement, determining image clarity

Resolution refers to the density of pixels (measured in PPI/DPI), with higher resolution providing greater detail and clarity. Standard screen resolution is 72 PPI, while print typically requires 300 DPI.

What is the purpose of 'named views' or 'saved views' in a CAD model?

Answer: To store camera positions and orientations for quick return to frequently used viewpoints

Named views save specific orientations, zoom levels, and visual states so designers can instantly return to important perspectives without manually repositioning the camera.

What is the primary objective of file formats and standards in Computer-Aided Design?

Answer: To ensure competence and proficiency in core file formats and standards concepts

The primary objective of file formats and standards knowledge is to ensure practitioners have the competence and proficiency needed to perform effectively and safely in their professional roles.

The computer communicates with the user via:

Answer: CRT

Cathode Ray Tube (CRT) screen gives the user the design created as an image. It is done by entering commands to get specific functions performed.

In Computer-Aided Design, what are the fundamental principles of parametric design?

Answer: Balance, contrast, emphasis, movement, pattern, rhythm, and unity

The fundamental principles of design include balance, contrast, emphasis, movement, pattern, rhythm, and unity, which work together to create visually effective and functional compositions.

Which simulation result metric indicates how much a part deforms under load?

Answer: Resultant displacement

Resultant displacement shows the total distance each node moves from its original position, revealing how much the part bends, stretches, or compresses.

The typical ICG system consists of software component:

Answer: B. False

It consists of both hardware and software. Hardware includes CPU, workstations and peripheral devices. Software consists of computer programmes required to implement graphics.

What is the purpose of using layers in a CAD drawing?

Answer: To organize geometry by type so elements can be shown, hidden, or locked independently

Layers group related geometry (e.g., dimensions, center lines, hatches) so drafters can control visibility and editability for different drawing elements.

In motion simulation, what term describes the joint that allows rotation about one axis only, like a door hinge?

Answer: Revolute joint

A revolute (or hinge) joint constrains all translations and two rotational degrees of freedom, permitting only single-axis rotation.

In thermal simulation, what property describes a material's ability to conduct heat?

Answer: Thermal conductivity

Thermal conductivity (k) quantifies how readily a material transfers heat through conduction, measured in W/(m·K).

The functionality areas of CAD application can be grouped into ______________ categories.

Answer: 4

The four categories are geometric modelling, engineering analysis, design review and evaluation and automated drafting.

In Computer-Aided Design, what is the rule of thirds?

Answer: A compositional guideline that divides the frame into a 3x3 grid for balanced placement

The rule of thirds divides the frame into nine equal sections with two horizontal and two vertical lines. Placing key elements along these lines or at their intersections creates more dynamic and visually appealing compositions.

What does 'associativity' mean between a CAD model and its engineering drawing?

Answer: Changes to the 3D model automatically propagate to dimensions and views in the linked 2D drawing

Associativity means the 2D drawing views and dimensions are linked to the 3D model, so any geometry change updates the drawing automatically without manual re-dimensioning.