In 3D CAD and engineering graphics, which solid type results from sweeping a 2D profile along a straight (linear) path?

Introduction / Context:
Feature-based modeling creates solids by transforming 2D profiles. Two fundamental operations are revolve (around an axis) and extrude (along a path). Understanding which operation yields which result is essential for accurate modeling.

Given Data / Assumptions:

• A 2D closed profile (e.g., rectangle, circle, polyline) is available.
• The path is linear (straight line in a specified direction).
• We want the standard solid generated by this operation.

Concept / Approach:
Extrusion moves a profile a specified distance along a direction, creating a prismatic solid whose cross-section matches the profile. This is distinct from revolve, which rotates a profile about an axis to produce a solid of revolution (e.g., shafts, pulleys).

Step-by-Step Solution:

Verification / Alternative check:
Section the model perpendicular to the extrusion direction; the cross-section should match the original 2D profile exactly. Measuring the model length should equal the extrusion distance.

Why Other Options Are Wrong:

• Planar solid: Not a standard term for this operation.
• Revolved solid: Requires rotation about an axis, not a straight sweep.
• Warped solid: Implies a nonplanar or twisted surface, not a linear extrusion.

Common Pitfalls:
Extruding an open profile yields a surface, not a solid. Ensure the sketch is closed and lies on a plane.

Final Answer:
Extruded solid