Orthographic Projections - Multiview of Orthographic Projection

Orthographic Projection "X"

(Plan, Elevation, 3D View)

To Understand

How to draw a plan of an actual object?

How and what is elevation view?

How to draw 3D, does it need to follow scale?

Here is Orthographic Projection of X which on A3 size of CATRIDGE PAPER 

Tracing of Orthographic Projection on A3 size of tracing paper

Then we were asked to select any of an object we like to do the same stuff as the Orthographic Projection of X. I selected a key. 

Here is Orthographic Projection of the key which on A3 size of CATRIDGE PAPER

Tracing of Orthographic Projection of the key on A3 size of tracing paper