Even by knowing that the drawing is first or third angle projection, you might still have to ponder what the physical part looks like depending on what views were displayed & how complex the part is. Sometimes you can have parts with features that have coincidental lines corresponding to features. Technically correct in their respective views, but still not exactly intuitive. I have seen many drawings like that which is just plain frustrating, especially if they skipped other views that would further define the feature. The objective should always be clarity, not an image IQ test. Anyway, careful when you get drawings of parts from Europe or Asia because they use different projection standards to N-Am. Its not better or worse, its just different. That's why CAD software typically watermarks the standard being used on drawing itself, so the designer cant mess it up by omission. The part itself doesn't change inside the CAD model, but the 'hardcopy' can. Projection is as important as stating the scale & dimensions.
Angle of Projections : Engineering Drawing: We all know that engineering drawing is language of engineers. So every engineer must be able to read drawing ond decode the information provided at drawing. This exercise enables you to identify the projection system and you will never forget.
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