3D Coordinate System AutoCAD MCQs

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

1. What are the three axes in a 3D coordinate system in AutoCAD?
A) X, Y, Z
B) Length, Width, Height
C) North, South, East
D) Top, Bottom, Side
Answer: A

2. In a 3D model, which axis represents depth?
A) X-axis
B) Y-axis
C) Z-axis
D) None of the above
Answer: C

3. How do you switch between the World Coordinate System (WCS) and the User Coordinate System (UCS)?
A) By using the VIEW command
B) By using the UCS command
C) By using the COORDS command
D) It cannot be done
Answer: B

4. What is the purpose of the UCS icon in 3D modeling?
A) To indicate the current layer
B) To show the active coordinate system
C) To provide dimension references
D) To display hidden objects
Answer: B

5. Which command allows you to define a new User Coordinate System?
A) UCS
B) WCS
C) COORDINATE
D) 3D
Answer: A

6. What does the “PLAN” command do when working in 3D?
A) Switches to a 2D view
B) Sets the current view to the UCS
C) Deletes the current model
D) Saves the drawing
Answer: B

7. How can you move the UCS to a specific point in a 3D space?
A) By using the MOVE command
B) By using the UCS command with the “Origin” option
C) By selecting the point and dragging
D) It cannot be moved
Answer: B

8. What is the default coordinate system in AutoCAD?
A) User Coordinate System (UCS)
B) World Coordinate System (WCS)
C) Local Coordinate System (LCS)
D) 2D Coordinate System
Answer: B

9. Which coordinate entry method allows you to specify a point in 3D space directly?
A) Cartesian coordinates
B) Polar coordinates
C) Spherical coordinates
D) Cylindrical coordinates
Answer: A

10. How are 3D coordinates typically entered in AutoCAD?
A) (X, Y, Z)
B) [X, Y, Z]
C) {X, Y, Z}
D) |X, Y, Z|
Answer: A

11. What does the “3DORBIT” command do?
A) It allows you to rotate the model in 3D space
B) It creates a 3D solid
C) It switches to a 2D view
D) It sets the UCS
Answer: A

12. How do you define the height of a point in 3D coordinates?
A) By using the Y-coordinate
B) By using the Z-coordinate
C) It is defined by the X-coordinate
D) Height cannot be defined in 3D
Answer: B

13. Which command can be used to return to the World Coordinate System?
A) UCS
B) WCS
C) PLAN
D) COORDS
Answer: B

14. What does the “UCSFOLLOW” variable control in AutoCAD?
A) It controls the visibility of the UCS icon
B) It determines if the UCS changes with the view
C) It allows the user to switch between 2D and 3D
D) It locks the current coordinate system
Answer: B

15. How can you temporarily switch to the WCS while in the UCS?
A) By using the WCS command
B) By pressing the F8 key
C) By pressing the Ctrl key
D) By using the PLAN command
Answer: D

16. Which view allows you to see all three axes in AutoCAD?
A) Top View
B) Front View
C) Isometric View
D) 3D View
Answer: C

17. What is the effect of changing the UCS orientation in a 3D model?
A) It changes the color of the model
B) It affects the way objects are drawn relative to the UCS
C) It has no effect
D) It locks the model in place
Answer: B

18. How can you view the coordinates of a specific point in a 3D model?
A) By using the LIST command
B) By hovering over the point
C) By enabling dynamic input
D) All of the above
Answer: D

19. What does the term “local coordinate system” refer to?
A) A system based on the World Coordinate System
B) A system created for a specific object
C) A fixed coordinate system in AutoCAD
D) A temporary coordinate system
Answer: B

20. How is the Z-axis typically represented in AutoCAD?
A) As a vertical line
B) As a horizontal line
C) As a dashed line
D) As a colored line
Answer: A

21. Which option allows you to snap to specific points in a 3D model?
A) Object Snap
B) Dynamic Input
C) Command Line
D) UCS Snap
Answer: A

22. What happens to the coordinate values when you switch the UCS?
A) They remain the same
B) They are reset to zero
C) They are recalibrated to the new UCS
D) They are averaged
Answer: C

23. How can you create a 3D point using the mouse?
A) Click and drag
B) Click once at the desired location
C) Right-click to place a point
D) Use the mouse wheel
Answer: B

24. What does the command “VPOINT” do?
A) It sets the view point in 3D
B) It displays the current coordinates
C) It aligns objects
D) It creates new layers
Answer: A

25. In a 3D coordinate system, what does the term “origin” refer to?
A) The center of the model
B) The intersection of all three axes (0,0,0)
C) The starting point of a drawing
D) The highest point in the model
Answer: B

26. Which command helps in aligning an object to the UCS?
A) ALIGN
B) UCSALIGN
C) MOVE
D) 3DALIGN
Answer: D

27. What does the “LAYER” command do in a 3D environment?
A) It changes the layer visibility
B) It manages layers for 3D objects
C) It only applies to 2D objects
D) It locks the current layer
Answer: B

28. How do you rotate an object around the Z-axis in a 3D model?
A) By using the ROTATE command with Z as the base point
B) By using the 3DROTATE command
C) By changing the UCS
D) It cannot be done
Answer: B

29. Which command allows you to view the model from a specific angle?
A) VIEW
B) VPOINT
C) 3DORBIT
D) PLAN
Answer: B

30. What does the “VIEWCUBE” feature do in AutoCAD?
A) It displays the coordinates of a point
B) It allows easy navigation of 3D views
C) It helps in editing objects
D) It locks the current view
Answer: B

31. How can you delete a specific UCS that you no longer need?
A) By using the DELETE command
B) By using the UCS command with the “Delete” option
C) By switching to a different UCS
D) It cannot be deleted
Answer: B

32. How can you reset the UCS to the default WCS?
A) By using the UCS command and selecting WCS
B) By using the REGEN command
C) By saving the drawing
D) By exiting and reopening AutoCAD
Answer: A

33. What does the “DVIEW” command do in 3D modeling?
A) It creates a new UCS
B) It allows you to set a view for rendering
C) It deletes 3D objects
D) It manages layers
Answer: B

34. How can you use the “EXTENTS” command in 3D modeling?
A) To set the limits of the model
B) To zoom to the full extents of the model
C) To delete excess geometry
D) To define a new UCS
Answer: B

35. What is the advantage of using the “VIEW” command in 3D models?
A) It allows for better editing of 2D shapes
B) It helps to control the visual style
C) It provides different perspectives of the model
D) It changes the UCS
Answer: C

36. What does the “3DFACE” command create?
A) A 3D solid object
B) A surface with defined edges
C) A 2D representation of 3D shapes
D) A flat surface
Answer: B

37. How can you convert a 2D object to 3D in AutoCAD?
A) By using the EXTRUDE command
B) By using the COPY command
C) By changing the view
D) It cannot be done
Answer: A

38. What command is used to create a 3D polyline?
A) POLYLINE
B) 3DPOLY
C) POLY3D
D) 3DLINE
Answer: B

39. Which tool helps in navigating complex 3D models?
A) Pan
B) Zoom
C) 3D Orbit
D) VIEW
Answer: C

40. What is the primary function of the “SOLID” command?
A) To create 2D shapes
B) To create 3D solid objects
C) To view the model
D) To set the UCS
Answer: B

41. How do you temporarily hide the UCS icon?
A) By using the UCS command
B) By changing the visual style
C) By pressing the F11 key
D) It cannot be hidden
Answer: B

42. What is the effect of using the “RENDER” command in a 3D model?
A) It saves the drawing
B) It generates realistic images of the model
C) It creates new layers
D) It deletes 3D objects
Answer: B

43. How can you measure the distance between two points in 3D?
A) By using the DIST command
B) By using the MEASURE command
C) By manually calculating
D) It cannot be measured
Answer: A

44. What does the “Z” value represent when entering 3D coordinates?
A) Width
B) Length
C) Height or depth
D) Angle
Answer: C

45. How can you visualize a 3D model in a wireframe view?
A) By using the WIRE command
B) By changing the visual style to Wireframe
C) By using the HIDE command
D) It cannot be visualized in wireframe
Answer: B

46. Which option allows you to export a 3D model?
A) EXPORT command
B) PRINT command
C) PLOT command
D) SAVE command
Answer: A

47. How does the “DYNAMIC INPUT” feature assist in 3D modeling?
A) It simplifies 3D commands
B) It provides real-time feedback for coordinate entry
C) It limits available commands
D) It has no effect
Answer: B

48. What command can be used to view the dimensions of a 3D model?
A) DIMLINEAR
B) DIMSCALE
C) DVIEW
D) DIM3D
Answer: C

49. What is the purpose of using the “GROUP” command in 3D models?
A) To edit multiple objects simultaneously
B) To create a single object from multiple ones
C) To layer objects for better organization
D) It has no purpose
Answer: A

50. How can you create a section view in a 3D model?
A) By using the SECTION command
B) By using the SLICE command
C) By using the DVIEW command
D) It cannot be done
Answer: B