AutoCAD Coordinate Systems & Navigation 2 — Questions and Answers
Question 1: Which UCS option aligns the XY plane to the face of a selected 3D solid?
- World
- Face (Correct answer)
- Object
- View
Correct answer: Face
The Face option of the UCS command aligns the coordinate system's XY plane to the selected face of a 3D solid or surface.
Question 2: What does the UCSICON command control in AutoCAD?
- The size of the crosshair cursor
- The display and placement of the coordinate system icon (Correct answer)
- The UCS name label in the viewport
- The grid origin marker appearance
Correct answer: The display and placement of the coordinate system icon
The UCSICON command controls whether the UCS icon is displayed, its position, and its visual style in the current viewport.
Question 3: When using the 3-point UCS option, what three points must be specified?
- X-axis start, Y-axis start, Z-axis start
- New origin, point on positive X-axis, point on positive Y side of the XY plane (Correct answer)
- New origin, X-axis endpoint, Y-axis endpoint
- Center point, X-direction point, Y-direction point
Correct answer: New origin, point on positive X-axis, point on positive Y side of the XY plane
The 3-point UCS option requires the new origin, a point defining the positive X-axis direction, and a point confirming the positive Y side of the XY plane.
Question 4: Which system variable stores the name of the currently active UCS?
- UCSNAME (Correct answer)
- UCSBASE
- UCSVARIABLE
- UCSCURRENT
Correct answer: UCSNAME
The UCSNAME system variable stores the name of the current UCS; it returns an empty string if the UCS has not been given a name.
Question 5: What is the primary purpose of Dynamic UCS in AutoCAD?
- Automatically updates coordinate readout as the cursor moves
- Temporarily aligns the UCS to a 3D solid face during drawing commands (Correct answer)
- Dynamically rotates the viewport to match the current UCS
- Automatically saves UCS settings whenever they are changed
Correct answer: Temporarily aligns the UCS to a 3D solid face during drawing commands
Dynamic UCS temporarily aligns the XY plane to the face of a 3D solid while executing drawing commands, without permanently changing the UCS.
Question 6: What happens when you select the 'World' option within the UCS command?
- The current UCS is deleted
- The UCS is rotated 90 degrees
- The UCS is reset to the World Coordinate System (Correct answer)
- The UCS is saved and a new blank UCS is started
Correct answer: The UCS is reset to the World Coordinate System
The World option resets the current UCS back to the World Coordinate System (WCS), which is the fixed global reference system.
Question 7: Which UCS option aligns the coordinate system so the XY plane matches the current view plane?
- Face
- Object
- View (Correct answer)
- Previous
Correct answer: View
The View option aligns the UCS XY plane perpendicular to the current viewing direction, making the screen itself the XY plane for text and annotation work.
AutoCAD Coordinate Systems & Navigation 2
Which UCS option aligns the XY plane to the face of a selected 3D solid?