Lecture 1 - Technical Drawing Introduction II Engineering drawings are important in conveying useful information to other engineers and manufacturer Allow the readers to visualize what the proposed product would look like Provide information on dimensions and material used to make the proposed product Provide views from the top, the side, and the front

1. Technical Drawing – II
Introduction

2. Books
Basics of Engineering Drawing
By Zahid Ahmed Siddiqi
Paul F. Richard - Introduction to AutoCAD
2020 A modern Perspective (29 July 2019,
Macromedia Press)
Bernd S. Palm; Alf Yarwood. Introduction
to AutoCAD 2016.Routledge Press.2015
Text Book
Reference Books

3. Importance of Engineering Drawing
• “a picture is worth a thousand
words”
• In engineering, a good drawing
is worth even more than a
thousand words

4. Importance of Engineering Drawing
•Engineering drawings are important in conveying useful
information to other engineers and manufacturer
 Allow the readers to visualize what the proposed product would
look like
 Provide information on dimensions and material used to make the
proposed product
 Provide views from the top, the side, and the front

5. Waterfall
M. C. Escher
Technical drawing is
the language of
engineers and
designers

6. GRAPHICS
LANGUAGE

7. 1. Try to write a description of
this object.
2. Test your written description
by having someone attempt
to make a sketch from your
description.
Effectiveness of Graphics Language
The word languages are inadequate for describing the
size, shape and features completely as well as
concisely.
You can easily understand that …

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

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

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

11. Computer drawing
The drawings are usually made by commercial software
such as AutoCAD, BIM etc.
Example

12. Engineering
Drawing

13. 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.

14. THANK YOU

15. HOW TO GET AN A IN
TECHNICLA DRAWING - II
Attend the classes regularly
Prepare yourself prior to classes
Do your homework and assignments individually
as well as in cooperative learning environment
Do not skip quizzes and test
Be pro-active. If in doubt, ask!