CSWP Assembly Mass Properties Analysis 2 — Questions and Answers
Question 1: In a SolidWorks assembly, when you change the material of a subassembly component, what must you do to update the top-level assembly mass properties?
- Rebuild the assembly using Ctrl+Q
- Re-open the assembly file
- Run Mass Properties again from the Evaluate tab (Correct answer)
- Update the Bill of Materials
Correct answer: Run Mass Properties again from the Evaluate tab
Running Mass Properties again from the Evaluate tab recalculates based on the current material definitions of all components.
Question 2: Which SolidWorks option allows you to override the density used in a mass properties calculation without changing the part's assigned material?
- Edit Material dialog
- Override Mass Properties in the Mass Properties dialog (Correct answer)
- Configuration Properties
- Appearance manager
Correct answer: Override Mass Properties in the Mass Properties dialog
The 'Override Mass Properties' checkbox in the Mass Properties dialog lets you specify custom density, mass, or center of mass values.
Question 3: When SolidWorks calculates the moment of inertia for an assembly, which reference frame is used by default?
- The center of mass of the assembly
- The assembly origin (Correct answer)
- The first component's origin
- The bounding box center
Correct answer: The assembly origin
By default, the moment of inertia is reported relative to the assembly's origin coordinate system.
Question 4: A SolidWorks assembly has components with no material assigned. How does this affect the Mass Properties result?
- SolidWorks uses air density for those parts
- SolidWorks skips those components entirely
- SolidWorks uses a default density and warns the user (Correct answer)
- SolidWorks reports zero mass for the entire assembly
Correct answer: SolidWorks uses a default density and warns the user
SolidWorks applies a default density and displays a warning that some components lack assigned materials.
Question 5: What is the primary difference between 'Assigned mass properties' and 'Computed mass properties' in SolidWorks?
- Assigned values come from material databases; computed values are estimated
- Assigned values are manually entered overrides; computed values are geometry-based calculations (Correct answer)
- Computed values require purchased licenses; assigned values are free
- Assigned values apply only to sheet metal; computed values apply to solids
Correct answer: Assigned values are manually entered overrides; computed values are geometry-based calculations
Assigned mass properties are user-defined overrides entered manually, while computed properties derive from the part's geometry and material density.
Question 6: In which SolidWorks dialog can you select a custom coordinate system to report the center of mass relative to a user-defined reference frame?
- Mate Properties dialog
- Mass Properties dialog using the 'Report coordinate values relative to' dropdown (Correct answer)
- Section Properties dialog
- Simulation Study Properties
Correct answer: Mass Properties dialog using the 'Report coordinate values relative to' dropdown
The Mass Properties dialog includes a dropdown to choose any user-created coordinate system as the reporting reference.
Question 7: How does suppressing a component in a SolidWorks assembly affect the mass properties calculation?
- The suppressed component retains its mass contribution
- The suppressed component is excluded from mass properties (Correct answer)
- The suppressed component is replaced with a point mass
- SolidWorks throws an error and cannot calculate mass
Correct answer: The suppressed component is excluded from mass properties
Suppressed components are excluded from the assembly mass properties calculation as if they do not exist.
CSWP Assembly Mass Properties Analysis 2
In a SolidWorks assembly, when you change the material of a subassembly component, what must you do to update the top-level assembly mass properties?