QUESTIONS AND ANSWERS
In the creation of solid models, computer-generated geometry was referred to as parts,
features, or objects; however, the objects that make up a system are referred to as -
ANS components
In assembly modeling, the copies of a component within the system are called -
ANS instances
A ___________is a grouping of components that serves a single purpose within the overall
assembly - ANS subassembly
Why not just put multiple copies of the abutment part within the assembly? Why do you have
to learn about components and instances? Why are subassemblies that are made up of
instances and that are instances themselves important? The main reasons for the changes are
to - ANS improve assembly modeling efficiency and to save computer storage space
improve assembly modeling efficiency and to save computer storage space __________ means
that if you change the geometry of a part, the component and all instances of it also will change
by the same amount - ANS associativity
Assembly models are easier to work with when they are organized in a logical manner. An
assembly is usually thought of as a composition of several smaller subassemblies, each of which
may consist of other subassemblies or individual components. The organization or structure of
a system is referred to as its - ANS hierarchy
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, The first thing you want to do after setting up your system hierarchy is to orient the instances
so they are properly located in space relative to one another. To do that, you need to select one
component to serve as the - ANS base instance.
As with objects and features, the associations between components and subassemblies are
often called - ANS parent-child relationships
hen creating parts, you used constraints to establish geometric and dimensional relationships
between 2-D entities or features. Thus, you constrained two lines to be parallel or
perpendicular to each other. Or you constrained the diameter of a circle to be a specific size
and its center to be located given distances from lines on the drawing or from edges on an
object. In assembly modeling, you can apply ____________ between two 3-D instances so the
instances maintain dimensional or geometric relationships with respect to each other within
the assembly - ANS assembly constraints
Each time you bring an instance of a component into an assembly, you
introduce______________... Simultaneously, Each time you apply a constraint to the assembly,
you________________________ - ANS six degrees of freedom.
Remove one or more of these degrees of freedom (DOF)
Two entities take up the same space - ANS Coincidence
Once you assemble your system, you can create an ________________ that will essentially be
an assembly drawing for the system - ANS exploded configuration
The amount that two instances overlap is referred to as the _________. Another advantage is
that you can determine _______________ - ANS interference, Clearance
One common place where you need to check interferences and clearances is between -
ANS Shafts and circular holes
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