MCQs on 3D Modeling Basics | AutoCAD
Enhance your understanding of 3D Modeling in AutoCAD with these AutoCAD MCQ questions and answers. This chapter covers 3D workspaces, creating and editing 3D objects, and tools for 3D visualization. Whether you’re a beginner or an advanced user, test your skills with these practice questions to excel in 3D modeling concepts.
Multiple Choice Questions (MCQs)
Introduction to 3D Workspaces
- What is the purpose of the 3D Basics workspace in AutoCAD?
a) To edit 2D objects
b) To create and modify 3D objects
c) To convert 3D models to 2D
d) To generate technical drawings - Which of the following workspaces is best suited for advanced 3D modeling?
a) Drafting & Annotation
b) 3D Modeling
c) Classic AutoCAD
d) 3D Basics - What command is used to switch between 2D and 3D workspaces in AutoCAD?
a) WSPACE
b) SWITCH3D
c) TOGGLEVIEW
d) WORKMODE - In AutoCAD, which axis is introduced when transitioning from 2D to 3D workspaces?
a) X-axis
b) Y-axis
c) Z-axis
d) WCS - What tool in the 3D workspace is used to align objects in 3D space?
a) Align tool
b) UCS tool
c) Grid tool
d) Ortho tool
Creating 3D Objects (Primitives, Extrude, Revolve)
- Which of these is not a 3D primitive in AutoCAD?
a) Box
b) Cylinder
c) Line
d) Sphere - What does the EXTRUDE command do in AutoCAD?
a) Converts 2D objects into 3D objects
b) Flattens 3D objects into 2D
c) Rotates objects in 3D space
d) Splits a 3D object into parts - What is required to use the REVOLVE command?
a) A circle and a reference axis
b) A 2D profile and an axis of revolution
c) Two 3D primitives
d) Only a 3D solid - The POLYSOLID tool is used to create:
a) Solid extrusions from polylines
b) Circular 3D objects
c) Layered 3D surfaces
d) Revolved objects - What property is primarily adjusted when scaling a 3D object?
a) Orientation
b) Size
c) Material
d) Color
Editing 3D Models (Union, Subtract, Intersect)
- The UNION command in AutoCAD is used to:
a) Split two objects
b) Combine two or more solids into one
c) Remove overlapping areas
d) Create a copy of the model - Which command removes a portion of one 3D object where it overlaps another?
a) Union
b) Subtract
c) Intersect
d) Slice - The INTERSECT command in AutoCAD creates:
a) The overlapping region of two solids
b) A hollow shell of a solid
c) A copy of the entire model
d) A mirrored version of the object - What happens when you apply the SHELL command to a solid?
a) It makes the solid transparent
b) It creates a hollowed version of the solid
c) It divides the solid into sections
d) It applies a material to the solid - To edit the edges of a 3D model, you would most likely use:
a) Fillet or Chamfer commands
b) Slice command
c) Subtract tool
d) Align tool
3D Visualization Tools (Orbit, Viewports, Visual Styles)
- What does the 3DORBIT command do?
a) Creates a circular 3D object
b) Allows rotation of the view around the model
c) Changes the scale of the 3D model
d) Combines multiple objects - How are multiple viewports helpful in 3D modeling?
a) They improve rendering speed
b) They allow viewing the model from different perspectives
c) They automatically save the project
d) They reduce file size - Which visual style provides a realistic rendering of the model with shadows and textures?
a) Wireframe
b) Conceptual
c) Realistic
d) Hidden - In AutoCAD, the VIEWCUBE is used for:
a) Navigating and orienting 3D models
b) Rendering high-quality images
c) Flattening 3D objects
d) Animating 3D scenes - What command changes the lighting and material properties of a 3D model?
a) MATERIALS
b) LIGHTING
c) VISUALSTYLES
d) RENDER
Additional 3D Modeling Features
- What does the SECTIONPLANE command do?
a) Adds a new layer to the model
b) Creates a cross-sectional view of a 3D object
c) Scales the object
d) Combines multiple 3D primitives - How is the SLICE command used in 3D modeling?
a) To cut a solid into two or more parts
b) To scale an object
c) To adjust the thickness of a surface
d) To change the color of an object - Which command creates a mirrored copy of a 3D object?
a) Reflect
b) Flip
c) Mirror3D
d) Symmetry - What does the ALIGN command do in 3D?
a) Matches the position of one object with another
b) Rotates an object
c) Adjusts the color of an object
d) Creates a copy of the object - The PRESSPULL tool in AutoCAD is used to:
a) Extrude faces dynamically
b) Split objects into segments
c) Rotate solids
d) Combine multiple 3D primitives - Which is an example of a Boolean operation in AutoCAD?
a) Move
b) Subtract
c) Scale
d) Copy - What is the purpose of the LOFT command in AutoCAD?
a) To create a 3D shape by joining multiple cross-sections
b) To rotate objects around an axis
c) To flatten a 3D object
d) To edit edges of a solid - Which of these tools helps in reducing the number of faces in a complex 3D model?
a) Simplify tool
b) Purge
c) Decimate mesh
d) Optimize - Which viewport setting is ideal for viewing a 3D model in perspective?
a) Orthographic
b) Perspective
c) Isometric
d) Top - What is the benefit of using dynamic UCS in 3D modeling?
a) It allows automatic alignment with a selected face or plane
b) It reduces rendering time
c) It improves texture mapping
d) It converts solids to wireframes
Answer Table
| Qno | Answer |
|---|---|
| 1 | b) To create and modify 3D objects |
| 2 | b) 3D Modeling |
| 3 | a) WSPACE |
| 4 | c) Z-axis |
| 5 | a) Align tool |
| 6 | c) Line |
| 7 | a) Converts 2D objects into 3D objects |
| 8 | b) A 2D profile and an axis of revolution |
| 9 | a) Solid extrusions from polylines |
| 10 | b) Size |
| 11 | b) Combine two or more solids into one |
| 12 | b) Subtract |
| 13 | a) The overlapping region of two solids |
| 14 | b) It creates a hollowed version of the solid |
| 15 | a) Fillet or Chamfer commands |
| 16 | b) Allows rotation of the view around the model |
| 17 | b) They allow viewing the model from different perspectives |
| 18 | c) Realistic |
| 19 | a) Navigating and orienting 3D models |
| 20 | c) VISUALSTYLES |
| 21 | b) Creates a cross-sectional view of a 3D object |
| 22 | a) To cut a solid into two or more parts |
| 23 | c) Mirror3D |
| 24 | a) Matches the position of one object with another |
| 25 | a) Extrude faces dynamically |
| 26 | b) Subtract |
| 27 | a) To create a 3D shape by joining multiple cross-sections |
| 28 | c) Decimate mesh |
| 29 | b) Perspective |
| 30 | a) It allows automatic alignment with a selected face or plane |