CAD CAD Specialist Mechanical Design and Engineering

Question 1

In mechanical CAD, what does GD&T stand for?

Accepted Answer

Geometric Dimensioning and Tolerancing

Answer

GD&T (Geometric Dimensioning and Tolerancing) is a symbolic language used on engineering drawings to define the allowable variation in form, orientation, and location of features.

Question 2

What is the purpose of a 'datum' in GD&T?

Accepted Answer

A theoretically exact reference point, axis, or plane from which measurements are made

Answer

A datum is a theoretically exact reference feature (point, axis, or plane) used as the origin from which geometric tolerances and dimensions are measured.

Question 3

In Inventor or SolidWorks, what is a 'parametric model'?

Accepted Answer

A model whose geometry is driven by editable dimension parameters

Answer

A parametric model stores design intent through dimensions and constraints, so changing a parameter automatically updates the entire model geometry.

Question 4

What is a 'bill of materials' (BOM) in mechanical CAD assembly design?

Accepted Answer

A structured list of all components, quantities, and part numbers in an assembly

Answer

A BOM (Bill of Materials) is a structured table listing every part, sub-assembly, quantity, and part number that makes up a product assembly.

Question 5

In mechanical drafting, what does a 'section view' show?

Accepted Answer

The interior features of a part as if it were cut open along a cutting plane

Answer

A section view exposes the internal features of a part by showing it as if it were cut along a defined cutting plane, revealing interior geometry.

(CAD) Certified Computer-Aided Design Specialist Practice Test

(CAD) Certified Computer-Aided Design Specialist Practice Test

CAD CAD Specialist Mechanical Design and Engineering