CAD Geometric Constraints 1 — Questions and Answers
Question 1: What does a 'coincident' constraint do in a CAD sketch?
- Forces two points to share the same location (Correct answer)
- Makes two lines parallel to each other
- Locks an element to a fixed position in space
- Ensures two lines are equal in length
Correct answer: Forces two points to share the same location
A coincident constraint forces two points (or a point and a curve) to occupy the same location in the sketch plane.
Question 2: Which geometric constraint ensures two lines remain parallel at all times?
- Equal
- Collinear
- Parallel (Correct answer)
- Symmetric
Correct answer: Parallel
A parallel constraint forces two lines to maintain the same direction vector, keeping them parallel regardless of other changes.
Question 3: What is the primary purpose of a 'Fix' constraint in CAD sketching?
- Locks a sketch element's position and orientation to the coordinate system (Correct answer)
- Prevents the element from being deleted
- Converts a construction line to a real line
- Makes the element equal in length to another
Correct answer: Locks a sketch element's position and orientation to the coordinate system
A Fix constraint anchors a sketch element to specific coordinates, preventing it from moving when other constraints or dimensions change.
Question 4: Which geometric constraint would you apply to make two circles share the same center point?
- Tangent
- Coincident
- Concentric (Correct answer)
- Equal
Correct answer: Concentric
A concentric constraint forces two circles or arcs to share the same center point, making them concentric.
Question 5: What does a 'Tangent' constraint enforce between a line and an arc?
- The line passes through the arc's center
- The line and arc meet at exactly one point without crossing (Correct answer)
- The line is perpendicular to the arc's radius at the endpoint
- The line and arc are parallel
Correct answer: The line and arc meet at exactly one point without crossing
A tangent constraint ensures a line and arc (or two arcs) touch at exactly one point, with the line being tangent to the curve at that contact point.
Question 6: Which geometric constraint forces a line to be perfectly horizontal in the sketch?
- Perpendicular
- Collinear
- Horizontal (Correct answer)
- Fixed
Correct answer: Horizontal
A Horizontal constraint locks a line so its two endpoints share the same Y-coordinate, keeping it aligned with the X-axis.
Question 7: What does a 'Symmetric' constraint do in a CAD sketch?
- Makes two elements equal in size
- Mirrors two elements about a centerline so they remain equidistant from it (Correct answer)
- Ensures two lines are parallel
- Locks elements to the origin
Correct answer: Mirrors two elements about a centerline so they remain equidistant from it
A symmetric constraint forces two sketch elements to remain mirror images of each other about a specified axis or line.
CAD Geometric Constraints 1
What does a 'coincident' constraint do in a CAD sketch?