DMD Computer-Aided Design (CAD) & Simulation 2

Question 1

Which tolerance analysis method guarantees assembly by assuming all individual part tolerances simultaneously reach their extreme limits?

Accepted Answer

Worst-Case Tolerance Analysis

Answer

Worst-case tolerance analysis ensures assemblability under all possible combinations by assuming every part is at its tolerance extreme simultaneously.

Question 2

In CAD-based motion simulation, what is a 'degree of freedom' (DOF)?

Accepted Answer

An independent way a rigid body can move or rotate in space

Answer

Degrees of freedom describe the possible movements (translation or rotation) a body can make; a rigid body in 3D space has up to 6 DOF.

Question 3

What is the primary advantage of using a digital twin during product development and operation?

Accepted Answer

Enables real-time monitoring and simulation of a product's physical behavior

Answer

A digital twin mirrors a physical asset to simulate, predict, and optimize performance using real-time data from sensors on the physical counterpart.

Question 4

In simulation mesh generation, what does increasing 'mesh density' directly affect?

Accepted Answer

Both solution accuracy and computational time required

Answer

A finer mesh improves solution accuracy in critical regions but also significantly increases the computational resources and time needed to solve the analysis.

Question 5

Which CAD feature allows multiple design variants (e.g., different sizes or options) to coexist within a single CAD file?

Accepted Answer

Design configurations

Answer

Configurations allow multiple design variants with different dimensions, suppressed features, or material assignments within one CAD file.

DMD - Digital Manufacturing and Design Technology Certification Practice Test

DMD - Digital Manufacturing and Design Technology Certification Practice Test

DMD Computer-Aided Design (CAD) & Simulation 2