1. INTRODUCTION TO
Engineering Drawing

2. What is GRAPHICS LANGUAGE?

3. Let’s have a
‘FUN’
You can easily understand that …
The word languages are inadequate for describing the size, shape and features completely as well as concisely.

4. Composition of Graphic Language
Graphic language in “engineering application” use
lines to represent the surfaces, edges and contours of objects.
The language is known as “drawing” or “drafting” .
A drawing can be done using freehand, instruments or computer methods.

5. Composition of Graphic Language

6. Freehand drawing Example
The lines are sketched without using instruments other than pencils and erasers.
Example

7. Instrument drawing Example
Instruments are used to draw straight lines, circles, and curves concisely and accurately. Thus, the drawings are usually made to scale.
Example

8. Computer drawing Example
The drawings are usually made by commercial software such as AutoCAD, solid works etc.
Example

9. Engineering Drawing

10. Elements of Engineering Drawing
Engineering drawing are made up of graphics language
and word language.
Graphics
language
Describe a shape (mainly).
Word
language
Describe size, location and specification of the object.

11. Basic Knowledge for Drafting
Graphics
language
Word
language
Line
types
Geometric
construction
Projection
method
Lettering

12. Drawing Standard

13. Drawing standards are used so that drawings convey
Standards are set of rules that govern how technical drawings are represented.
Drawing standards are used so that drawings convey
the same meaning to everyone who reads them.

14. Standard Code มอก. สำนักงานมาตรฐานผลิตภัณฑ์อุตสาหกรรม Country Code
Full name
มอก.
สำนักงานมาตรฐานผลิตภัณฑ์อุตสาหกรรม
Thailand
ANSI
American National Standard Institute
USA
JIS
Japanese Industrial Standard
Japan BS
British Standard UK AS
Australian Standard
Australia
Deutsches Institut für Normung
DIN
Germany
ISO
International Standards Organization

15. Drawing Sheet Trimmed paper of a size A0 ~ A4.
Standard sheet size (JIS)
A x 297
A x 420
A x 594
A x 841
A x 1189 A2 A1
(Dimensions in millimeters) A0

16. Orientation of drawing sheet
1. Type X (A0~A4)
2. Type Y (A4 only) c d d c
Drawing
space
Border
lines
Drawing space
Title block
Title block c
Sheet size c (min) d (min) A

17. DIMENSION OF TITLE BOX MEGHNAD SAHA INSTITUTE OF TECHNOLOGY DEPARTMENT
NAME
ROLL NO SESSION –

19. TOPICS Identify the Drawing Tools. Preparation of Tools.
Using of Tools
Applied Geometry

20. Identify the Drawing Tools

21. Drawing Boards

22. Board Clips
Adhesive Tape

23. T-Square

24. Set Square

25. Compass

26. HB for thick line
2H for thin line
Pencils

27. Sharpener
Sandpaper

28. Pencil Eraser
Erasing Shield

29. Circle Template
Tissue paper

30. French Curves no 5 & 6

31. Preparation of Tools