CAD CAD Specialist Mechanical Design and Manufacturing 1 — Questions and Answers
Question 1: In mechanical CAD, what does GD&T stand for?
- General Drafting and Tolerancing
- Geometric Dimensioning and Tolerancing (Correct answer)
- Graphic Design and Toolpathing
- Grade Definition and Testing
Correct answer: Geometric Dimensioning and Tolerancing
GD&T stands for Geometric Dimensioning and Tolerancing, the standard system for defining allowable variation in part geometry.
Question 2: Which GD&T symbol represents 'flatness' on a mechanical drawing?
- A circle with a center line
- Two parallel horizontal lines (Correct answer)
- A parallelogram
- A circle with a cross
Correct answer: Two parallel horizontal lines
Flatness is represented by two parallel horizontal lines in GD&T and controls how flat a surface must be.
Question 3: In Autodesk Inventor or SolidWorks, what is a 'mate' constraint used for when assembling parts?
- Applying a material to a part
- Defining a geometric relationship that positions two parts relative to each other (Correct answer)
- Generating a bill of materials
- Creating a weld symbol
Correct answer: Defining a geometric relationship that positions two parts relative to each other
Mate constraints in mechanical CAD assemblies define the positional and angular relationships between two components.
Question 4: What is a bill of materials (BOM) in the context of a mechanical CAD assembly drawing?
- A list of required tools for machining
- A structured list of all parts and components in an assembly with quantities (Correct answer)
- A schedule of manufacturing operations
- A cost estimate for raw materials
Correct answer: A structured list of all parts and components in an assembly with quantities
A BOM is a structured table in an assembly drawing listing every part, its part number, description, and quantity required.
Question 5: Which drawing view type in mechanical CAD shows the interior features of a part by cutting through it with a defined cutting plane?
- Auxiliary view
- Section view (Correct answer)
- Detail view
- Isometric view
Correct answer: Section view
A section view reveals internal features of a part by showing the cross-section along a defined cutting plane.
Question 6: In CAD-based manufacturing (CAM), what does the term 'toolpath' refer to?
- The rack and pinion path of the CNC machine table
- The programmed trajectory a cutting tool follows to machine a part (Correct answer)
- The path of a part through the assembly line
- The route material travels from stock to finished part
Correct answer: The programmed trajectory a cutting tool follows to machine a part
A toolpath is the defined trajectory generated in CAM software that the cutting tool follows to remove material and create the part.
CAD CAD Specialist Mechanical Design and Manufacturing 1
In mechanical CAD, what does GD&T stand for?