Basic Engineering Drawing - 00106
 Periods/Week   Periods in one
0 0 6 120 100 80 20


Rationale and Objective


Drawing is said to be the language of engineers. All material objects have a shape and form, which can be represented by a combination of known geometrical figures. A thorough grounding in drawing to represent these objects on a plane is considered very essential for Diploma holders. Any construction or fabrication be it be a building, a factory or a machine has to begin with a drawing which forms the basis and guide to get the work done.


Drawing is commonly used mode of communication in the engineering industry. Proper exposure to drawing helps the students to translate different ideas into practice. Acquisition of skill will produce a drawing to represent a given object with sufficient knowledge to understand and interpret. As such drawing is regarded a pre-requisite for technician engineer.


With these objectives in view the following topics have been prescribed:


SL Topics No. of Plates Periods
1. Introduction . 06
2. Lettering, Numbering and Dimensioning 01 12
3. Conic Section 02 24
4. Orthographic Projection 05 39
5. Section Views and Auxiliary Views 01 12
6. Isometric, Pictorial and Oblique Drawing 02 18
7. Development of Surfaces 01 15
  Total 12 Sheets 120


 Topic  Contents Periods
 01 - Introduction 06
01.01 Importance of Engineering Drawing as graphic communication. Link between engineering drawing and other subjects of study in diploma course.  
01.02 I. S. specification for preparation of drawings.  
01.03 Use of drawing instruments and materials. Basic Tools- classification and brief description.  
01.04 Special Tools: Mini-drafter. Drafting Machine.  
01.05 Scales, Recommended, reduced and enlarged scale.  
01.06 Lines, Types of lines, Selection of line thickness.  
01.07 Selection of Pencils.  
01.08 Drawing sheets, different sheet sizes and standard layouts. Title block as per I.S. specification.  
01.09 Care and maintenance of drawing material.  
 02 - Lettering, Numbering and Dimensioning 12
02.01 Importance of lettering. Different types of lettering as per I. S. code. Capital and small letters of vertical and slanting type as per I. S. code.  
02.02 Numerical figures of vertical and slanting type as per I. S. code. Single stroke and double stroke, advantages.  
02.03 Necessity of dimensioning. Principles and method of dimensioning and dimensioning practice as per I.S.I. code.  
02.04 Making of Centre Line, Section Line, Dimensioning Lines, etc.
02.05 Drawing of plain and diagonal scales and dimensioning practice.
 03 - Conic Section 24
03.01 Concept of Drawing and concept of conic section and its simple properties.  
03.02 Concept of ellipse and its construction by various methods. Drawing of tangent and normal on ellipse.  
03.03 Concept of parabola and its construction by various methods. Drawing of tangent and normal to parabola.  
03.04 Concept of hyperbola and its construction by various methods. Drawing of tangent and normal to hyperbola.  
03.05 Concept of spirals; construction of Logarithmic & Archemerian spirals. To draw tangent and normal to the curves.  
 04 - Orthographic Projections 39
04.01 Principles of orthographic projection. Concept of horizontal, vertical and auxiliary planes. 1st angle and 3rd angle projection.  
04.02 Projection of points on horizontal, vertical and auxiliary planes and its implication.  
04.03 Projection of lines on different planes, Length of line and its true inclination with different planes and its traces.  
04.04 Concept of orthographic projection of planes.  
 05 - Section Views and Auxiliary Views 12
05.01 Concept of sectioning and drawing section lines, Need for drawing sectional views.  
05.02 Section of simple geometrical solids-cases involving different types of cutting planes.  
05.03 Conventional representation of materials as per I.S. Code.  
 06 - Isometric, Pictorial and Oblique Drawing 18
06.01 Introduction to pictorial drawing. Brief description of different types of pictorial drawing viz Isometric, oblique and perspective and their applications.  
06.02 Concept of Isometric views. Isomeric Projection and Isometric Scale.  
06.03 Isometric Projection of simple solids, frustum of solids, truncated solids and sets of simple solids.  
06.04 Concept of oblique and perspective views.  
06.05 Simple drawing of oblique views.  
 07 - Development of Surfaces 09
07.01 Development of surfaces of Cylinders, Prisms, Pyramids, cones and their frustum and truncated objects.  


 Recommended Books
SL Title Author/Publisher
1. Descriptive Geometry Abbot
2. Elementary Engineering Drawing N. D. Bhatt
3. Elementary Engineering Drawing S. C. Sharma
5. I.S.I. Specification on drawing -
6. Engineering Drawing R. K. Dhawan
7. Engineering Drawing P. S. Gill
8. Engineering Drawing Parkinson
9. I.S.M. & S.S.M. on Technical Drawing T.T.T.I., Madras
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