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MAE 1351 EXAM 4 EXAM REVIEW
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MAE 1351 EXAM 4 EXAM REVIEW
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MAE 1351EXAM 4 EXAM
REVIEW
___________ conform to national, international, and individual company standards -
Answers -Dimensions
The accepted national standard in the United States for Dimensioning and Tolerancing
is - Answers -ANSI Y14.5
Most drawings conform to the _______________, which is metric and uses the
millimeter as the standard unit; or they conform to ________________ with a standard
unit of the decimal inch - Answers -International System of Units (SI)
U.S. Standard Customary Unit
Where the dimension is less than one millimeter_________ - Answers -a zero precedes
the decimal point
Where the dimension is a whole number____________ - Answers -neither the decimal
point nor the zero is shown.
A thin, dark, solid line extending from a point on an object, perpendicular to a dimension
line. *Extension lines are used to indicate the extension of a surface or point to a
location preferably outside the part outline (see Figure 15.10). There should be a visible
gap between extension lines and chapter 15 Dimensioning 15-7 15.04 visible lines so
the person reading the drawing can distinguish between the part and the dimensions
describing the part. - Answers -Extension Line
, A thin, dark, solid line terminating with an arrowhead at one end and a dimension, note,
or symbol at the other end. *Leaders are used to direct a dimension, note, or symbol to
the intended place on a drawing. - Answers -■ Leader
Dimensions should appear only once on a drawing. In addition, each dimension should
be placed in the view where the contour shape is best shown. This is known as -
Answers -contour rule or contour dimensioning.
______________ help to define outer boundaries of parts quickly - Answers -Overall
Dimensions
When the "inside" dimensions are more important or more critical than the overall
dimension, the overall dimension should be identified as a - Answers -Reference
Dimension
Reference dimensions, like the overall dimension in (b), are identified by - Answers -
Enclosing them in Parenthesis
circles are typically dimensioned as
Arcs are dimensioned as - Answers -diameters (Ø)
arcs are dimensioned as radii
This type of dimensioning is frequently used for CNC machines that work from a
rectangular coordinate system. - Answers -Baseline dimensioning
This is appropriate when part function requires that features be related to one another,
as discussed previously for the part in Figure 15.17(b) - Answers -Chain dimensioning
can cause problems with tolerance accumulation
Another good rule of thumb to follow when dimensioning is to dimension only - Answers
-to visible or solid lines
(This is related to the contour rule)
When someone is looking at your drawing, the first thing that will be noticed will be -
Answers -The object itself
. Dimension lines, extension lines, and leader lines should be - Answers -Thin and Dark
Engineering drawings require the use of_________
In addition, letters should be_________ - Answers -Single Stroke Gothic Lettering
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