Technical drawing should be mostly out of scope unless it deals with making a technical drawing into a illustration, some basic principles, layout of graphs, producing technical drawings to print or orthographic drawing which may be a graphics designer skill also.
Please note one of my jobs is teaching drafting to very high end automatic CAE/simulation setups at the Aalto University School of Engineering. So im more than capable of answering these questions. I however think they clearly belong to Mechanical engineering SE that's under works. Tough mainly because engineering is a alien concept to most designer and may cause lot of confusion and contradictions.
PS: Technical drawing is (or has been since 1960s) being phased out from drawing so engineers do not draw as much as describe geometry mathematically.