Technical drawing
Basic drawing equipment
CREATING A MOVIE TO DEFINE A CONCEPT -> HERE (Example)
You can find the list of concepts -> HERE
Drawing perspectives
Multiview drawing
(When you install it, change filename to QCAD.EXE, select C:\ as destination folder. Then find program inside C:\QCAD)
See attachments below to know what you need to draw using CAD program:
QCAD 1 - STAIRS
QCAD 2 - CIRCLES
QCAD 3 - TANGENTS
Exploded views
Read this webpage and answer in the page you have -> Exploded views and CAD programs