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

General Design and Tolerance

Answer

Graded Drawing and Toolpath

Answer

Geometric Drawing and Tracking

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 tolerance zone applied to a surface

Answer

A type of weld symbol on a drawing

Answer

A layer convention for mechanical drawings

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 model generated from a spreadsheet formula

Answer

A model imported from a neutral file format

Answer

A model with predefined material properties

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 cost estimate for raw materials

Answer

A toolpath report for CNC machining

Answer

A layer list used in the assembly drawing

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

An external isometric view of the part

Answer

A detail view magnifying a small feature

Answer

A view showing hidden lines in dashed format

Question 6

What is the function of 'mating constraints' or 'mates' in a CAD assembly?

Accepted Answer

Defining geometric relationships that position and constrain parts relative to each other

Answer

Assigning material properties to components

Answer

Creating exploded view animations

Answer

Applying GD&T symbols to assembly drawings