A drawing that is scaled at one-half the size of the actual part is indicated by ______ in the title block

A drawing that is scaled at one-half the size of the actual part indicates a scale of 1:2 in the title block. This notation means that for every 1 unit measurement on the drawing, it represents 2 units on the actual part. In other words, the drawing is a reduced version of the real object, specifically half its actual dimensions.

This scaling is crucial for accurately interpreting and fabricating parts based on engineering drawings, as it ensures that dimensions, proportions, and relationships are maintained. The use of 1:2 clearly communicates that the drawing presents a simplified view that helps in understanding the design without needing to create a full-size model.