PRINCIPLES OF DRAFTING AND SHOP DRAWING - OD1641 - LESSON 1/PE 1
LESSON 1.
PRACTICAL EXERCISE - ANSWERS
a)
The six orthographic views are:
(1) top view
(2) bottom view
(3) right-hand side view
(4) left-hand side view
(5) front view
(6) rear view.
b)
There are two kinds of sketches.
c)
A T-square is used as a guide for drawing horizontal lines and as a support for
the triangles.
d)
A protractor measures angles.
e)
The geometric way of finding the center of a line is bisecting.
f)
Isometric drawings may be dimensioned by using either the unidirectional or
aligned system.
g)
It is very easy to transfer information from the orthographic front view to the
oblique view is because of the 90, relationship between the left-hand axis and
the vertical axis.
h)
The three types of lines associated with dimensioning are:
(1) Extension lines, which are used to indicate the extension of an edge or point
to a location outside the part outline.
(2) Dimension lines, which show the direction and extent of dimension.
(3) Leader lines, which are used to direct an expression in note form, to the
intended place on the drawing.
The leader line should terminate in an
arrowhead or dot.
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