CBSE Class 11 Engineering Graphics Syllabus 2020-21

UPDATED COURSE STRUCTURE CLASS XI (2020-21) One Paper (Theory) : 3 Hours 70 Marks One paper (Practical): 3 Hours 30 Marks S.No. Unit Marks Periods I PLANE GEOMETRY 10 15 1. Lines, angles and rectilinear figures 2. Circles, inscribing and circumscribing of circles II SOLID GEOMETRY 30 70 3. Orthographic projection of points and lines 4. Orthographic projection of regular plane figures 5. Orthographic projection of right regular solids 6. Section of solids III MACHINE DRAWING 30 50 7. Orthographic projections of simple machine blocks 8. Isometric projection of laminae (plane figures) Practicals 30 30 Total Marks 100 165 THEORY I. PLANE GEOMETRY 15 Periods Printing English alphabets (capital and small) and numerals in standard proportions. Unidirectional/aligned system of dimensioning as per SP 46:2003 (Revised) Unit 1: Construction of lines, angles and their divisions. Simple questions based on triangles, square, rhombus, regular polygons-pentagon, and hexagon. 8 Periods Unit 2: Construction of circles, inscribing and circumscribing of circles in equilateral triangle, square, rhombus, regular polygons-pentagon and hexagon. 7 Periods II. SOLID GEOMETRY 70 Periods Unit 4: Orthographic projection: dimensioning and conventions strictly as per SP 46:2003 (Revised). Orthographic projection of points and lines. 20 Periods Unit 5: Orthographic projection of regular plane figures - triangle, square, pentagon, hexagon, circle and semi-circle. 14 Periods Unit 6: Orthographic projection of right regular solids such as cubes; prisms and pyramids (square, triangular, pentagonal and hexagonal); cones; cylinders; spheres; hemi-spheres; frustum of pyramids and cone, when they are kept with their axis (a) perpendicular to HP/VP (b) parallel to HP and VP both. 20 Periods

Unit 7: Section of right regular solids such as cubes; prisms and pyramids (square, triangular, pentagonal, and hexagonal); cones; cylinders; spheres, kept with their axis perpendicular to HP/VP, made by a vertical cutting plane. 16 Periods III. MACHINE DRAWING 50 Periods Unit 8: Orthographic projection of simple machine blocks. 25 Periods Unit 9: Isometric Projection - Construction of isometric scale showing main divisions of 10 mm and smaller divisions of 1 mm each. Isometric projection (drawn to isometric scale) of regular plane figures - triangle, square, pentagon, hexagon, circle and semi-circle with their surface parallel to HP or VP (keeping one side either parallel or perpendicular to HP/VP). 25 Periods PRACTICALS 30 Periods 1. Making different types of graphic designs/ murals for interior/ exterior decorations in colour using the knowledge of geometrical figures with the use of any Computer Software such as Collab-CAD and/or any equivalent pertinent software. 2. Drawing the following engineering curve through activities - ellipse (by trammel & thread method) on the ground/ drawing sheet/ plywood/ cardboard etc. 3. Developing the following solids with the help of cardboard/ thick paper. a) cube, cuboid b) prisms & pyramids (triangular, square, pentagonal and hexagonal) c) right circular cylinder and cone 4. Preparing the section of solids (prisms, pyramids, sphere, etc.) with clay, soap, thermocol, plasticine, wax or any other material (easily and economically available). When the cutting plane is: parallel to the base, perpendicular to the base or inclined to the base. Note: I. 10 practicals (minimum two each from aforementioned four points) are to be assessed. II. In all the practicals, drawing/sketching of the views should be incorporated and evaluated accordingly. III. The scheme of evaluation is as follows: (a) Practicals (2) 15 Marks (b) Drawing/ Sketch 05 Marks (c) Viva-voce 05 Marks (d) Sessional Work 05 Marks Total 30 Marks