Engineering
Representation Vocabulary
Sketch
A sketch is a general, rough, and/or
incomplete draft or plan of an engineering design.
Isometric Projection
Isometric
drawings represent
three dimensional objects in
two
dimensions. They create an illusion of three dimensions because the x-
y- and z-axes are inclined, respectively, 30, 150, and 90 degrees from
the horizontal.
Oblique Projection
In oblique projections the front view
is
drawn true size , and the receding surfaces are drawn on an angle to
give it a pictorial appearance. This form of projection has the
advantage of showing one face (the front face) of the object without
distortion. Generally, the face with the greatest detail faces the
front .
Orthographic (Multi-View)
Projection
Multi-view projections allow
for a precise representation of
an object,
with each side drawn perpendicular to the plane of projection.
Normally, only three sides of an object are shown in multi-view
projections: front view, top view, and right side view.
Plan View
Plan
view drawings represent
the placement of walls, doors, appliances, and other features of a
building or other structure. Plan view drawings are used by
engineers, architects, and construction staff for planning and precise
building instructions.
Calipers
A gauge with a graduated bar and
a
sliding jaw, used for accurate measurements of objects.
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