There are basically two concepts that you need to keep in mind when specifying dimensions in an engineering drawing:
A) size and location.
B) size and material.
C) size and tolerance.
D) part number and material.

Question

Quizplus · Accepted Answer

When specifying dimensions in an engineering drawing, the two most important aspects are the size (the actual measurement of the feature being drawn) and its location (where the feature is located relative to other parts or features on the drawing). While material and tolerance are important considerations in manufacturing a part, they are not specifically related to specifying dimensions on the drawing itself. Similarly, part number is not typically included in the dimensions of a feature but rather is used to refer to the feature in other documents or systems.

There Are Basically Two Concepts That You Need to Keep