CAD Geometric Constraints 2

Question 1

What is the key difference between geometric constraints and dimensional constraints in CAD?

Accepted Answer

Geometric constraints define shape relationships; dimensional constraints define size and position numerically

Answer

Geometric constraints define qualitative relationships (parallel, perpendicular, tangent), while dimensional constraints assign numeric values for size and position.

Question 2

What does an 'Equal' constraint do when applied to two lines?

Accepted Answer

Makes them the same length

Answer

An Equal constraint forces two lines (or curves) to maintain identical lengths, so changing one automatically updates the other.

Question 3

Which constraint ensures a point lies exactly on a curve or line (not necessarily at its endpoint)?

Accepted Answer

On Curve (Point On)

Answer

A 'Point On' or 'On Curve' constraint forces a point to lie anywhere along a line, arc, or spline rather than requiring it to match an endpoint.

Question 4

What is 'over-constraining' in CAD sketching?

Accepted Answer

Applying redundant or conflicting constraints that make the sketch mathematically unsolvable or over-defined

Answer

Over-constraining occurs when constraints conflict or are redundant, leaving no degree of freedom and making the sketch over-defined — most CAD tools highlight this as an error.

Question 5

Which geometric constraint makes two lines or curves meet at a 90-degree angle?

Accepted Answer

Perpendicular

Answer

A Perpendicular constraint forces two lines (or a line and a curve) to intersect at exactly 90 degrees.

CAD - Computer-Aided Design Practice Test

CAD - Computer-Aided Design Practice Test

CAD Geometric Constraints 2