Does anyone know the different types of drawings ?
They are usually question 1 on the short questions
Isometric - http://www.technologystudent.com/prddes1/drawtec2.html
Perspective (Vanishing points) - https://pipocacombacon.files.wordpress.com/2014/10/08feac8a19e1401c6ed989ec3e8a6fb5.jpg?w=346
Orthographic - http://www.engineeringessentials.com/ege/ortho/ortho_page2.htm
Developments - http://nptel.ac.in/courses/112103019/35
Those are the main four, you need to know, learn how to finish off vanishing points since they ask that very often. For orthographic, know the differences between elevation, plan and end elevation.
Elevation - Right or Left view
Plan - Top view
End Elevation - Front view
Hope that helps
This is a better site explaining perspective drawing