Hands-On AutoCAD ©2005

Chapter 14: Basic 3D CAD

The Z Axis, the UCS Command, and 3D Viewports

1.
The axis used to show depth in AutoCAD® is the
A)W axis.
B)X axis.
C)Y axis.
D)Z axis.
2.
The right-hand rule is used to determine the direction of the
A)positive X axis.
B)negative Y axis.
C)positive Z axis.
D)negative X axis.
3.
All of the axes in the 3D coordinate system meet at
A)60° angles.
B)90° angles.
C)120° angles.
D)135° angles.
4.
In AutoCAD®, all objects are drawn on the
A)YZ plane.
B)XZ plane.
C)XY plane.
D)ZX plane.
5.
The UCS command
A)allows you to manipulate the user coordinate system.
B)controls display of the UCS icon.
C)defines the world coordinate system.
D)allows you to draw in the YZ plane.
6.
The World option of the UCS command
A)returns to the world coordinate system.
B)returns to the previous user coordinate system.
C)defines a new world coordinate system.
D)aligns a new coordinate system parallel to the screen.
7.
To allow you to view 3D models from different points of view, AutoCAD® provides
A)three predefined 3D views.
B)six predefined 3D views.
C)ten predefined 3D views.
D)twelve predefined 3D views.
8.
The VIEW command does all of the following except
A)provide access to AutoCAD®'s predefined views.
B)provide access to custom views.
C)create a new custom view.
D)display the View toolbar.
9.
To view a model from any position in 3D space, use the
A)VIEW command.
B)3DZOOM command.
C)3DORBIT command.
D)PAN command.
10.
The View option of the UCS command
A)aligns a new UCS parallel to the screen.
B)aligns a new UCS to the selected face of an object.
C)moves the origin of the current UCS to the lower left corner of the screen.
D)applies the current UCS to a specified viewport.
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