Working with 3D Models MCQs

By: Prof. Dr. Fazal Rehman Shamil | Last updated: September 24, 2024

1. What command is used to create a 3D solid from 2D objects in AutoCAD?
A) EXTRUDE
B) 3DSOLID
C) LOFT
D) SWEEP
Answer: A

2. Which type of object is created when you use the REVOLVE command?
A) 3D polyline
B) 3D mesh
C) 3D solid
D) 2D shape
Answer: C

3. What does the command “SWEEP” do in 3D modeling?
A) It creates a solid by moving a profile along a path
B) It scales objects
C) It rotates an object
D) It makes a mesh surface
Answer: A

4. How can you visualize your 3D model better in AutoCAD?
A) By using the PLAN view
B) By switching to a 3D visual style
C) By hiding all layers
D) By flattening the model
Answer: B

5. Which command is used to align objects in 3D space?
A) ALIGN
B) MOVE
C) 3DALIGN
D) SETUP
Answer: C

6. What does the “SECTIONPLANE” command do?
A) It creates a 3D section cut through a solid
B) It removes unwanted parts of a model
C) It draws a line in 3D space
D) It adds color to a 3D model
Answer: A

7. How do you change the view of a 3D model in AutoCAD?
A) By using the ZOOM command
B) By rotating the view with the mouse
C) By using the VIEW command
D) By changing layers
Answer: B

8. What is the purpose of the “UCS” command in 3D modeling?
A) To create new layers
B) To set the User Coordinate System
C) To save the model
D) To change the visual style
Answer: B

9. Which command allows you to create a 3D surface from a series of 2D lines?
A) SURFSCULPT
B) SURFLOFT
C) 3D POLYLINE
D) SURFCONVERT
Answer: B

10. How do you remove unwanted faces from a 3D solid?
A) By using the DELETE command
B) By using the 3DEDIT command
C) By using the ERASE command
D) By using the EXTRUDE command
Answer: B

11. Which command creates a solid by subtracting one object from another?
A) INTERSECT
B) UNION
C) SUBTRACT
D) ADD
Answer: C

12. What visual effect can be applied to 3D objects to enhance realism?
A) Shadows
B) Layers
C) Linetypes
D) Dimensions
Answer: A

13. In AutoCAD, which setting adjusts the transparency of 3D objects?
A) Visual Styles
B) Layer Properties
C) Render Settings
D) Material Properties
Answer: D

14. Which command would you use to generate a 3D path for a profile to follow?
A) POLYLINE
B) SPLINE
C) 3D PATH
D) LINE
Answer: B

15. How can you convert a 2D shape into a 3D model?
A) By using the COPY command
B) By using the EXTRUDE command
C) By changing its layer
D) By selecting the OBJECT command
Answer: B

16. What is the effect of the “MIRROR3D” command?
A) It duplicates a 3D object across a specified plane
B) It changes the scale of the object
C) It rotates the object
D) It scales the object to 2D
Answer: A

17. How can you create a 3D array of objects?
A) By using the ARRAY command with the 3D option
B) By copying objects manually
C) By using the MOVE command
D) It cannot be done in 3D
Answer: A

18. Which tool is used to create a 3D visual style that includes shadows and lighting?
A) 3D Visualization Tools
B) Render Tool
C) Lighting Effects
D) Visual Styles Manager
Answer: D

19. How can you measure the distance between two points in a 3D model?
A) By using the DIST command
B) By using the MEASURE command
C) By using the LIST command
D) All of the above
Answer: D

20. What does the “SOLIDEDIT” command allow you to do?
A) To convert 2D to 3D
B) To modify existing 3D solids
C) To create new solids
D) To delete solids
Answer: B

21. What type of file format is commonly used for exporting 3D models from AutoCAD?
A) .DWG
B) .DXF
C) .FBX
D) .PDF
Answer: C

22. What is the primary purpose of the “RENDER” command in 3D modeling?
A) To create a 2D version of a 3D model
B) To visualize a model with materials and lighting
C) To modify model dimensions
D) To print the model
Answer: B

23. Which option allows you to adjust the elevation of an object in 3D space?
A) MOVE
B) RAISE
C) OFFSET
D) Z-HEIGHT
Answer: A

24. How do you create a 3D solid that represents a sphere?
A) By using the SPHERE command
B) By using the ELLIPSE command
C) By using the SOLID command
D) By using the POLYLINE command
Answer: A

25. What is the advantage of using dynamic blocks in 3D modeling?
A) They allow for non-linear scaling
B) They offer multiple configurations without creating new blocks
C) They can only be used in 2D
D) They simplify 3D modeling
Answer: B

26. What does the “3DFACE” command create?
A) A 3D solid
B) A 3D face defined by four corners
C) A surface without thickness
D) A 2D representation
Answer: B

27. Which command allows you to create a 3D mesh from contour lines?
A) MESH
B) CONTOUR
C) MESHEDIT
D) SURFLOFT
Answer: A

28. How can you specify the height of an extrusion?
A) By dragging the mouse
B) By typing the height value when prompted
C) It is automatically determined
D) By changing the view
Answer: B

29. Which command can you use to rotate a 3D object around a specified axis?
A) TURN
B) ROTATE3D
C) 3DROTATE
D) ROTATE
Answer: B

30. How can you quickly switch between 2D and 3D views in AutoCAD?
A) By using the VIEW command
B) By using the ZOOM command
C) By changing the visual style
D) By using the VPOINT command
Answer: D

31. What is the purpose of the “BREP” command in 3D modeling?
A) To create a 3D representation of a shape
B) To define a boundary representation of a solid
C) To edit solid geometry
D) To convert 2D to 3D
Answer: B

32. What does the “3DSOLID” option allow you to create?
A) 2D shapes
B) Complex 3D shapes
C) Basic 3D solids
D) Only surface models
Answer: C

33. Which command would you use to trim a 3D solid?
A) TRIM
B) SOLIDTRIM
C) CUT
D) SUBTRACT
Answer: B

34. How do you save a 3D model for use in other applications?
A) By exporting it to a compatible file format
B) By copying and pasting
C) It cannot be done
D) By using the SAVE command only
Answer: A

35. What is the effect of using the “ISOLATEOBJECTS” command in a 3D model?
A) It hides all objects except the selected ones
B) It removes the selected objects
C) It merges objects
D) It locks selected objects
Answer: A

36. What does the “CAMERA” command allow you to set up in a 3D environment?
A) The position of the model
B) The point of view for rendering
C) The size of the model
D) The lighting
Answer: B

37. How can you change the color of a 3D solid?
A) By using the COLOR command
B) By changing the layer properties
C) By modifying the material properties
D) All of the above
Answer: D

38. Which command is used to create a cylindrical solid?
A) ELLIPSE
B) CYLINDER
C) REVOLVE
D) SPHERE
Answer: B

39. What is the primary purpose of using materials in 3D models?
A) To define the size of objects
B) To add visual realism through texture and color
C) To enhance printing quality
D) To simplify the model
Answer: B

40. How can you quickly view the coordinates of a point in a 3D model?
A) By hovering over the point
B) By using the LIST command
C) By checking the properties
D) All of the above
Answer: D

41. What command would you use to create a polygonal solid?
A) POLYGON
B) POLYSOLID
C) SOLIDPOLY
D) POLY3D
Answer: B

42. How can you create a 3D model using splines?
A) By using the SPLINE command with 3D coordinates
B) It cannot be done
C) By converting splines to solids
D) By adding splines to 2D shapes
Answer: A

43. Which command is useful for creating a complex surface from multiple curves?
A) CURVE
B) SURFLOFT
C) POLYLINE
D) MESH
Answer: B

44. What does the “DYNAMIC INPUT” feature help with in 3D modeling?
A) It shows only 2D input
B) It provides real-time feedback for input commands
C) It locks object positions
D) It simplifies the commands available
Answer: B

45. Which visual style allows you to see hidden lines in 3D models?
A) Conceptual
B) Realistic
C) Wireframe
D) Shaded
Answer: C

46. What is the function of the “VIEWBASE” command in 3D modeling?
A) To create 2D views from 3D models
B) To adjust the camera view
C) To change the model’s size
D) To export the model
Answer: A

47. How do you create a hole in a solid model?
A) By using the SUBTRACT command
B) By using the HOLE command
C) By using the EXTRUDE command
D) By using the REVOLVE command
Answer: A

48. Which command can be used to visually inspect a model from different angles?
A) PAN
B) 3DORBIT
C) ZOOM
D) VIEW
Answer: B

49. What is the effect of applying a “SHADOW” to a 3D model?
A) It changes the color of the model
B) It adds depth and realism to the visual appearance
C) It simplifies the geometry
D) It has no effect
Answer: B

50. How can you create multiple copies of a 3D object in various locations?
A) By using the COPY command with 3D settings
B) By using the ARRAY command
C) It cannot be done
D) By using the OFFSET command
Answer: B