M Final ECAD/CAxam Review Questions and Answers
Solved
1. What is the one question that a solid modeling application needs to be
able to answer?: Is an arbitrary 3D point (x,y,z) within the part or
assembly or is it outside the part or assembly?
2. Which of the following are solid modeling algorithms used to
mathematical- ly define whether an arbitrary point is inside or outside of a
solid?
a. Boundary Representation
b. Ray Tracing
c. Constructive Solid Geometry
d. Wire-Frame Model: a. Boundary Representation
,c. Constructive Solid Geometry
3. List at least three purposes of CAD software:: 1. CAD systems can be
used to generate realistic renderings or visualizations of a part or
assembly
2. CAD models are often used by finite element software to analysis a
design
3. CAD files are used as a means to communicate design information
between design teams or between suppliers and their customers
4. Which of the following are required for drawings based on the GD&T
stan- dards (choose all that apply)?
a. All dimensions that are not reference dimensions must have a tolerances
b. Plus/minus and limit tolerances are not allowed with GD&T.
c. Descriptions of manufacturing processes should be included
,whenever they are known.
d. Basic dimensions should be enclosed in a rectangle and their tolerances
are controlled by a feature control frame.: a. All dimensions that are not
reference dimensions must have a tolerance.
d. Basic dimensions should be enclosed in a rectangle and their
tolerances are controlled by a feature control frame.
5. Which symbol below is the third-angle projection
symbol? O |=|
|=| O: O|=|
6. Which of the following geometric controls require at least one datum
refer- ence to be specified (select all that apply)?
a. Angularity
b. Position
, c. Flatness
d. Perpendicularity: a. Angularity
b. Position
d. Perpendicularity
7. Which of the following are true for the datums listed in a feature
control frame (select all that apply)?
Solved
1. What is the one question that a solid modeling application needs to be
able to answer?: Is an arbitrary 3D point (x,y,z) within the part or
assembly or is it outside the part or assembly?
2. Which of the following are solid modeling algorithms used to
mathematical- ly define whether an arbitrary point is inside or outside of a
solid?
a. Boundary Representation
b. Ray Tracing
c. Constructive Solid Geometry
d. Wire-Frame Model: a. Boundary Representation
,c. Constructive Solid Geometry
3. List at least three purposes of CAD software:: 1. CAD systems can be
used to generate realistic renderings or visualizations of a part or
assembly
2. CAD models are often used by finite element software to analysis a
design
3. CAD files are used as a means to communicate design information
between design teams or between suppliers and their customers
4. Which of the following are required for drawings based on the GD&T
stan- dards (choose all that apply)?
a. All dimensions that are not reference dimensions must have a tolerances
b. Plus/minus and limit tolerances are not allowed with GD&T.
c. Descriptions of manufacturing processes should be included
,whenever they are known.
d. Basic dimensions should be enclosed in a rectangle and their tolerances
are controlled by a feature control frame.: a. All dimensions that are not
reference dimensions must have a tolerance.
d. Basic dimensions should be enclosed in a rectangle and their
tolerances are controlled by a feature control frame.
5. Which symbol below is the third-angle projection
symbol? O |=|
|=| O: O|=|
6. Which of the following geometric controls require at least one datum
refer- ence to be specified (select all that apply)?
a. Angularity
b. Position
, c. Flatness
d. Perpendicularity: a. Angularity
b. Position
d. Perpendicularity
7. Which of the following are true for the datums listed in a feature
control frame (select all that apply)?
