No, not all drawings are perspective. To draw in persective there is a specific layout, useing the horizon, or a vanishing point,.. basicly giveig the drawing a 3d effect, of depth.
There are three types of Pictorial Drawing: Isometric Drawing Perspective Drawing Oblique Drawing
Isometric, orthographic and oblique drawings.
Linear perspective
A. Axonometric and oblique drawings-three-dimensional drawings constructed without the use of perspective-are gaining popularity because they are quicker and easier to execute, and because their dimensions remain true to scale for any view. Because these views are easy to draw with instruments, they become suitable for use on working drawings.
It's when you make a bunch of unfinished drawings while you dream of the day they will make you famous. Perhaps you meant perspective drawing?
Italy
To read the piping and fabrication drawings easily and correctly the user must have significant knowledge about how the drawings are prepared, and the perspective in which these drawings can be presented.
A knowlege of perspective and practice.
There are three types of Pictorial Drawing: Isometric Drawing Perspective Drawing Oblique Drawing
Isometric, Orthographic and Perspective, but perspective is not required to depict an object.
isometric views orthagraphic views perspective views
Isometric, orthographic and oblique drawings.
Osamu A. Wakita has written: 'Perspective drawing series' -- subject(s): Study and teaching, Drawing, Perspective 'The professional practice of architectural working drawings' -- subject(s): Working drawings, Designs and plans, Architecture, Architectural drawing, Study and teaching 'Perspective Drawing'
Linear perspective
David Yue has written: 'Perspective drawings by programmable calculator' -- subject(s): Computer graphics, Data processing, Perspective, Programmable calculators
A. Axonometric and oblique drawings-three-dimensional drawings constructed without the use of perspective-are gaining popularity because they are quicker and easier to execute, and because their dimensions remain true to scale for any view. Because these views are easy to draw with instruments, they become suitable for use on working drawings.
Understanding civil engineering drawings is a basic skill needed for electrical engineers as these drawings give them a perspective on how the building is being built and how electrical appliances will be installed or provided.