Chapter 4 CAD Commands and Functions 125
12. _____ is used in section views to show
cutaway parts and to represent specific fi
materials.
13. Which of the following is not a common
editing or inquiry command?
A.
Rotate
B.
Extend
C.
Dimension
D.
List
14. The _____ command permanently removes
selected objects from the drawing.
15. The _____ command reverses the last
command.
16. The size of existing objects can be changed
using the _____ command.
17. A _____ is just like a fillet, except it is an fi
exterior arc.
18. Extending an object lengthens the object
to end precisely at an edge called a _____
edge.
19. The
Array
command is essentially a _____
function.
20. The _____ command is used to calculate the
area of an enclosed space.
21. Name three display control commands.
22. The
Zoom
command increases or decreases
the _____ factor.
23. Name the fi ve basic types of dimensioning
commands.
24. A(n) _____ is used to provide a specific or fi
local note.
25. Grid, snap, and ortho are examples of
_____.
26. Name the two types of snap.
27. A(n) _____ is a virtual piece of paper on
which CAD objects are placed.
28. _____ are special objects that can best
be thought of as symbols inserted into a
drawing.
29. One of the biggest advantages of using
blocks and attributes is the ability to auto-
matically generate _____.
30. An isometric drawing is a traditional 2D
_____ drawing.
31. Surface modeling creates 3D objects by
drawing a skin, often over a _____.
32. UCS is an abbreviation for _____.
33. Defi fine animation.
Problems and Activities
1. Using the reference section of this text
for samples, create a basic symbol library.
Create one symbol library that includes
symbols from a variety of applications,
such as material section symbols, structural
symbols, welding symbols, and electrical
symbols.
2. Identify the 3D commands in your school’s
CAD software. Create a list of the com-
mand names and the functions they
perform.
3. Obtain electronic examples of AEC render-
ings or animations. The Internet can be a
great source for this, but be sure to down-
load only those files labeled as “freeware” fi
or “freely distribute.” All others are copy-
righted material.
4. Collect as many different examples of 3D
computer-generated illustrations as you
can. Search through books and magazines
and bring them to class to share with your
classmates. Classify each one as a wire-
frame, “true” 3D model, or animation.