Objective 3. ORTHOGRAPHIC DRAWINGS. Describe the fundamentals of orthographic drawings, and
how they are used to construct objects. (Answer questions 7 and 8.)
Six-view orthographic projections are used to draw extremely complex objects; but generally drawings will
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be presented in three views showing the front, top, and right side. Which view, if any, should show the most
characteristic features of the object? (para 1-4,a(4))
Each view drawn using orthographic projection will show dimensions in their true length. For example, the
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front view will show the height and width of the object in true length. Which true length dimension(s) will be
common to both the top and right side views? (para 1-4,a(4))
Objective 4. SPECIAL VIEWS. List and describe the various special views used to supplement an
orthographic drawing, including sections and auxiliaries. (Answer questions 9 through 11.)
Assume that you are looking at a three-view orthographic drawing and you notice that the top view is wider
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than the front view. Further observation shows that a slanted face shown in the front view has been drawn in
the top view as if the slanted face were "straightened out" in order to show it as being parallel to the drawing
plane of the top view. What type of drawing would this be called? (para 1-5,b)
Section views give a clear view of interior or hidden features of an object and are obtained by "cutting" away
10.
part of the object to show the shape and construction at the cutting plane. How is the part "cut" by the cutting
plane identified? (para 1-5,c)
When a true sectional view might be misleading, parts such as ribs or spokes are drawn as if they are rotated
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into or out of the cutting plane. The resulting section is not a true projection, but it is easier to read. What is
this section called? (para 1-5,e(7))
Objective 5. REPRODUCTION OF CONSTRUCTION PRINTS. List and explain the different methods
used to reproduce construction prints. (Answer questions 12 through 14.)
Construction prints are working copies of original drawings produced by negative and positive contact
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processes, or by optical processes. Why are contact processes, rather than optical processes, normally used in
construction work? (para 1-8)
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