This is all about interpreting and producing engineering sketches used within the engineering industry. You will need to produce orthographic and pictorial sketches of such items as hydraulic cylinders, mounting brackets, guards, jigs, pipe joints, bolted flanged joints and assemblies of typically not more than five major parts.  Sketches need to be dimensioned and notated appropriately.

This is about interpreting mechanical engineering drawings.   It covers drawing types and many of the symbols used that you will meet in the industry.