29/09/2026
📘 Engineering Graphics Fundamentals – Unit I | Pages 6–15
This complete set of notes covers the fundamental concepts of Engineering Graphics and Technical Drawing, explained in a simple, clear, and visual way. These pages are useful for students learning engineering drawing, AutoCAD, SolidWorks, and mechanical design.
📐 Page 6 – Set Squares
Learn about set squares and their applications in engineering drawing:
45° Set Square
30°–60° Set Square
Vertical lines (90°)
Inclined lines at 30°, 45°, and 60°
Labelled diagrams of different set squares
🧭 Page 7 – Compass & Divider
Introduction to important drawing instruments:
Compass and its parts
Needle point and pencil point
Radius, circle, and arc
Divider and distance transfer
Line division
Practical examples of drawing circles, arcs, and transferring distances
📄 Page 8 – Drawing Sheet Sizes
Understanding standard engineering drawing sheets according to IS 962:1989:
A0, A1, A2, A3, and A4 sizes
Length and width
Drawing area
Standard margins
Nested-size diagram showing the relationship between A0–A4
📋 Page 9 – Drawing Sheet Layout
Learn the basic layout of an engineering drawing sheet:
Border line
Margin
Drawing space
Title block
Revision space
Identification
Sheet number
Drawing information and layout
📏 Page 10 – Types of Lines
A detailed introduction to standard engineering lines:
Continuous thick line
Continuous thin line
Dashed line
Chain thin line
Chain thick line
Freehand line
Zig-zag line
Line patterns and their applications
⚙️ Page 11 – Uses of Engineering Lines
Understand how different lines are used in technical drawings:
Visible outline
Hidden edge
Centre line
Dimension line
Extension line
Cutting-plane line
Section line
Construction line
Practical representation in front, top, and sectional views
✍️ Page 12 – Engineering Lettering
Learn the fundamentals of technical lettering:
Uppercase and lowercase letters
Numerals
Vertical lettering
Inclined lettering
Single-stroke lettering
Letter proportions
Comparison of vertical and 75° inclined lettering
📐 Page 13 – Dimensioning
Introduction to the important elements of engineering dimensioning:
Dimension line
Extension line
Arrowhead
Dimension text
Leader line
Centre line
Termination
Practical dimensioning of a rectangular component
📊 Page 14 – Types of Dimensioning
Different methods of dimensioning used in engineering drawings:
Linear dimension
Aligned dimension
Unidirectional dimension
Angular dimension
Radial dimension
Diameter dimension
Chain dimension
Parallel dimension
📚 Page 15 – Engineering Drawing Standards
An overview of engineering drawing standards and their importance:
BIS Standards
ISO Standards
Line standards
Lettering standards
Dimensioning standards
Projection standards
Symbols
Conventions
Uniformity and clear communication in engineering drawings
🎯 Overall Topic
These pages provide a strong foundation in Engineering Graphics Fundamentals, covering drawing instruments, sheet preparation, line conventions, lettering, dimensioning, and engineering drawing standards.
Useful for:
🔧 Mechanical Engineering | 📐 Engineering Graphics | 💻 AutoCAD | 🛠️ SolidWorks | ⚙️ Mechanical Design | 📏 Technical Drawing
YT | CAD Model and Mechanism
Learn CAD • Modeling • Mechanisms • Engineering Graphics
