Engineering Drawing I
Course Objective: To develop basic projection concepts with reference to points, lines, planes and geometrical solids. Also to develop sketching and drafting skills to facilitate communication.
 Instrumental Drawing, Technical Lettering Practices and Techniques(2 hours)
 Equipment and materials
 Description of drawing instruments, auxiliary equipment and drawing materials
 Techniques of instrumental drawing
 Pencil sharpening, securing paper, proper use of T squares, triangles, scales dividers, compasses, erasing shields, French curves, inking pens
 Lettering strokes, letter proportions, use of pencils and pens, uniformity and appearance of letters, freehand techniques, inclined and vertical letters and numerals, upper and lower cases, standard English lettering forms
 Dimensioning(2 hours)
 Fundamentals and techniques
 Size and location dimensioning, SI conversions
 Use of scales, measurement units, reducing and enlarging drawings
 Placement of dimensions: aligned and unidirectional
 Applied Geometry(6 hours)
 Plane geometrical construction: Proportional division of lines, arc & line tangents
 Methods for drawing standard curves such as ellipses, parabolas, hyperbolas, involutes, spirals, cycloids and helices (cylindrical and conical)
 Techniques to reproduce a given drawing (by construction)
 Basic Descriptive Geometry(14 hours)
 Introduction to Orthographic projection, Principal Planes, Four Quadrants or Angles
 Projection of points on first, second, third and fourth quadrants
 Projection of Lines: Parallel to one of the principal plane, Inclined to one of the principal plane and parallel to other, Inclined to both principal planes
 Projection Planes: Perpendicular to both principal planes, Parallel to one of the principal planes and Inclined to one of the principal planes, perpendicular to other and Inclined to both principal planes
 True length of lines: horizontal, inclined and oblique lines
 Rules for parallel and perpendicular lines
 Point view or end view of a line
 Shortest distance from a point to a line
 Edge View and True shape of an oblique plane
 Angle between two intersecting lines
 Intersection of a line and a plane
 Angle between a line and a plane
 Dihedral angle between two planes
 Shortest distance between two skew lines
 Angle between two non intersecting (skew) lines
 Multi view (orthographic) projections(18 hours)
 Orthographic Projections
 First and third angle projection
 Principal views: methods for obtaining orthographic views, Projection of lines, angles and plane surfaces, analysis in three views, projection of curved lines and surfaces, object orientation and selection of views for best representation, full and hidden lines
 Orthographic drawings: making an orthographic drawing, visualizing objects (pictorial view) from the given views
 Interpretation of adjacent areas, truelength lines, representation of holes, conventional practices
 Sectional Views: Full, half, broken revolved, removed (detail) sections, phantom of hidden section, Auxiliary sectional views, specifying cutting planes for sections, conventions for hidden lines, holes, ribs, spokes
 Auxiliary views: Basic concept and use, drawing methods and types, symmetrical and unilateral auxiliary views. Projection of curved lines and boundaries, line of intersection between two planes, true size of dihedral angles, true size and shape of plane surfaces
 Developments and Intersections(18 hours)
 Introduction and Projection of Solids
 Developments: general concepts and practical considerations, development of a right or oblique prism, cylinder, pyramid, and cone, development of truncated pyramid and cone, Triangulation method for approximately developed surfaces, transition pieces for connecting different shapes, development of a sphere
 Intersections: lines of intersection of geometric surfaces, piercing point of a line and a geometric solid, intersection lines of two planes, intersections of prisms and pyramids, cylinder and an oblique plane. Constructing a development using auxiliary views, intersection of  two cylinders, a cylinder & a cone
Practical: 3 hours/week; 15 weeks
 Drawing Sheet Layout, Freehand Lettering, Sketching of parallel lines, circles, Dimensioning
 Applied Geometry(Sketch and Instrumental Drawing)
 Descriptive Geometry I: Projection of Point and Lines (4.1 to 4.3)(Sketch and Instrumental Drawing)
 Descriptive Geometry II: Projection of Planes (4.4) (Sketch and Instrumental Drawing)
 Descriptive Geometry III: Applications in Three dimensional Space (4.5 to 4.15) (Sketch and Instrumental Drawing)
 Multiview Drawings (5.1) (Sketch and Instrumental Drawing)
 Multiview, Sectional Drawings and Dimensioning I (5.2)(Sketch and Instrumental Drawing)
 Multiview, Sectional Drawings and Dimensioning II (5.2) (Sketch and Instrumental Drawing)
 Auxiliary View, Sectional Drawings and Dimensioning (5.3) (Sketch and Instrumental Drawing)
 Projection of Regular Geometrical Solids (Sketch and Instrumental Drawing)
 Development and Intersection I (6.1) (Sketch and Instrumental Drawing)
 Development and Intersection II (6.2) (Sketch and Instrumental Drawing)
 Development and Intersection III (6.3) (Sketch and Instrumental Drawing)
References:
 “Fundamentals of Engineering Drawing”, W. J. Luzadder, Prentice Hall.
 “Engineering Drawing and Graphic Technology”, T. E. French, C. J. Vierck, and R. J. Foster, Mc Graw Hill Publshing Co.
 “Technical Drawing”, F. E. Giescke, A . Mitchell, H. C. Spencer and J. T. Dygdone, Macmillan Publshing Co.
 “Elementary Engineering Drawing”, N. D. Bhatt, Charotar Publshing House, India.
 “A Text Book of Engineering Drawing”, P. S. Gill, S. K. Kataria and Sons, India
 “A Text Book of Engineering Drawing”, R. K. Dhawan, S. Chand and Company Limited, India
Evaluation Scheme:
The questions will cover all the chapters in the syllabus. The evaluation scheme will be as indicated in the table below:
Chapter 
Hours 
Marks distribution * 
3 
6 
3 to 5 
4 
14 
7 to 10 
1, 2, 5 
22 
14 
6 
18 
14 
Total 
60 
40 
*Note: There may be minor deviation in marks distribution.
