Part Modeling with Equations Flashcards

In SolidWorks equations, which syntax correctly references a dimension named 'Width' in a sketch called 'Sketch1'?

Answer: "Width"@Sketch1

SolidWorks dimension references follow the format "DimensionName"@FeatureName.

When you use the IIF() function in a SolidWorks equation, what does it do?

Answer: Returns one of two values based on a conditional expression

IIF(condition, value_if_true, value_if_false) is a conditional function that returns different values depending on whether the condition is true or false.

A global variable 'Thickness' is set to 5mm. Which equation correctly sets feature dimension 'D1@Boss-Extrude1' to three times the thickness?

Answer: "D1@Boss-Extrude1" = "Thickness" * 3

Both the dimension reference and the global variable must be enclosed in double quotes in SolidWorks equations.

What happens to an equation-driven dimension when you suppress the feature it belongs to?

Answer: The equation is suspended but not deleted, and resumes when the feature is unsuppressed

Suppressing a feature suspends its equations; the equations remain intact and re-evaluate when the feature is unsuppressed.

In the SolidWorks equation editor, the 'sgn()' function returns which values?

Answer: −1, 0, or 1 depending on whether the argument is negative, zero, or positive

sgn(x) returns −1 for negative inputs, 0 for zero, and 1 for positive inputs.

You want an extrusion depth to automatically equal the diameter of a circular sketch. Which equation approach is most direct?

Answer: Write an equation: "D1@Boss-Extrude1" = "D1@Sketch1" where D1@Sketch1 is the diameter

A direct equation linking the extrusion depth dimension to the sketch diameter dimension automatically maintains the relationship on every rebuild.

Which of the following is a valid reason to use global variables instead of hard-coded numbers directly in equations?

Answer: Global variables allow a single change to propagate to all equations that reference them

Changing a global variable in one place updates every equation that references it, making the model easier to maintain.

Which SolidWorks equation function would you use to round a calculated dimension value down to the nearest integer?

Answer: floor()

floor(x) returns the largest integer less than or equal to x, effectively rounding down.

In a SolidWorks design table, a cell contains 'equations'. What does this indicate?

Answer: The dimension in that configuration is controlled by an equation rather than a static value

When a design table cell contains 'equations', it signals SolidWorks to use the model's existing equation for that dimension in that configuration instead of overriding it.

You have a part with a rib whose thickness should always be half of the base plate thickness. The base plate dimension is 'D1@Sketch2'. Which equation is correct for the rib dimension 'D1@Rib1'?

Answer: Both A and B are correct

Dividing by 2 and multiplying by 0.5 are mathematically equivalent, so both equations produce the correct result.

When an equation contains an error (e.g., division by zero), SolidWorks will:

Answer: Flag the equation with an error marker and prevent the model from rebuilding until corrected

SolidWorks marks invalid equations with error indicators and halts rebuilding, requiring the user to fix the equation before proceeding.

What is the primary advantage of using equation-driven curves in SolidWorks sketches?

Answer: They allow complex mathematical curves (e.g., sine waves, spirals) to be defined precisely by formulas

Equation-driven curves let you define geometry using explicit mathematical functions, enabling precise complex profiles that would be difficult to sketch manually.

In SolidWorks, the 'pi' constant in the equation editor represents approximately which value?

Answer: 3.14159

pi in SolidWorks equations equals 3.14159…, the ratio of a circle's circumference to its diameter.

You need the fillet radius of a part to automatically scale with the part's overall length. Which SolidWorks tool is best suited to establish this parametric relationship?

Answer: An equation linking the fillet dimension to the length dimension

An equation directly ties the fillet dimension to the length dimension, so any change in length automatically updates the fillet radius.

Which of the following operators is NOT supported natively in the SolidWorks equation editor?

Answer: % (modulo)

The modulo operator (%) is not natively available in the SolidWorks equation editor; workarounds require custom expressions.

A SolidWorks part has configurations 'Small', 'Medium', and 'Large'. You want each configuration to use a different value for the same equation-controlled global variable. What is the correct approach?

Answer: Create a design table that specifies the global variable value per configuration

Design tables allow global variable values to be specified per configuration, enabling different parametric behavior in each configuration.

What does enabling 'Automatic solve order' in the SolidWorks equation manager do?

Answer: Allows SolidWorks to determine the correct evaluation order based on dependencies

Automatic solve order lets SolidWorks resolve equation dependencies so that each equation evaluates after the variables it relies on are already computed.

In SolidWorks, which function returns the absolute value of a dimension expression?

Answer: abs()

abs(x) is the correct SolidWorks equation function that returns the non-negative magnitude of the argument.

You reference a dimension from a suppressed feature in an active equation. What will SolidWorks do?

Answer: Generate an error because the suppressed dimension cannot be evaluated

SolidWorks cannot evaluate a dimension belonging to a suppressed feature, resulting in an equation error that must be resolved.

Which statement about linking a SolidWorks part's material property to an equation is accurate?

Answer: Material density can be used as a variable in equations via the 'SW-Density' system property

SolidWorks exposes system properties like 'SW-Density' that can be referenced in equations, allowing geometry to respond to material changes.