Schematics or Blueprints.
to sketch picture of a car or any 3D designs
it is worthless in engineering drawing.
Drafting means actually drawing the drawing.
here are few reference books for engineering drawing.....Basant Agrawal and C M Agrawal (2008). Engineering Drawing. Tata McGraw Hill, New Delhi. [1]Paige Davis, Karen Renee Juneau (2000). Engineering DrawingDavid A. Madsen, Karen Schertz, (2001) Engineering Drawing & Design‎. Delmar Thomson Learning.[2]Cecil Howard Jensen, Jay D. Helsel, Donald D. Voisinet Computer-aided engineering drawing using AutoCAD.Warren Jacob Luzadder (1959). Fundamentals of engineering drawing for technical students and professional.M.A. Parker, F. Pickup (1990) Engineering Drawing with Worked Examples‎.Colin H. Simmons, Dennis E. Maguire Manual of engineering drawing. Elsevier.Cecil Howard Jensen (2001). Interpreting Engineering Drawings‎.
drafting
A drawing of the object in scale.
Any engineering object/task/product can be best demonstrated by drawing. Being general, not only engineering products, drawing helps understanding everything in science. However, drawing is used a lot in engineering specially, mechanical, cibvil, manufacturing, design etc branches. An engineer must be smart in drawing (understanding drawing & prepare drawing) to have sound reach in the material. Drawing is one of the languages of engineering. The other is mathematics.
to sketch picture of a car or any 3D designs
in it object is placed in first quadrent
Orthographic projection
it is worthless in engineering drawing.
In engineering drawing, there are several types of lines used to convey different information. Some common types of lines include object lines, which represent the visible edges and outlines of an object; hidden lines, which show edges that are not visible from a certain viewpoint; center lines, used to indicate the center of a cylindrical or symmetrical object; and dimension lines, which show the measurements of an object. Each type of line serves a specific purpose in communicating the design and specifications of an engineering drawing.
this is when you draw an object in front of you, not from a secondary source like a photograph, and draw excactly what you see without changing anything. Observational drawing appears less flat than drawing from a secondary source. You cannot do observatinal drawing unless the object i in front of you!Was ths helpful?The official definition for the word observational is "experimental: relying on observation or experiment; "experimental results that supported the hypothesis""
An exploded view drawing is a diagram, picture or technical drawing of an object, that shows the relationship or order of assembly of various parts
Oblique cavalier projection is used in technical drawing to show an object in three dimensions with one face of the object parallel to the picture plane. This projection allows for a quick and easy representation of the object's form, making it a useful tool for presenting designs and concepts in engineering and architecture.
A drawing of the object in scale.
I would understand that to be a drawing that shows true dimensions from three views. Engineering uses this to define a part. It usually has the object viewed from the 3 sides.