# Engineering Graphics Class 11 Syllabus

The syllabus is divided into four units: (i) Plane Geometry, (ii) Solid Geometry, (iii) Machine Drawing, and (iv) Practical .

Exam Structure

 S.No. Unit Marks Unit-I Plane Geometry 16 1 Lines, angles and rectilnear figures 2 Circles and tangents 3 Special curves: ellipse, parabola, involute, cycloid. helix and sine-curve Unit-II Solid Geometry 27 4 Orthographic-projections of points and line 5 Orthographic projection of regular plane figures 6 Orthographic projections of right regular solids 7 Section of solid-figures Unit-III Machine Drawing 27 8 Orthographic projections of simple machine-blocks 9 Isometric-projection of laminae (plane) figures 10 Development of surfaces IV. Practical 30 Total Marks 100

### I. PLANE GEOMETRY

Printing English alphabets (capital and small) 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, trapeziums, regular polygons-pentagon, hexagon and octagon.

Unit 2:

Construction of circles, external and internal tangents of circles, inscribing, circumscribing circles in equilateral triangle, square, rhombus, regular polygons-pentagon, hexagon and octagon.

Unit 3:

Construction of Engineering curves:

1. Ellipses by concentric circles, intersecting arcs and intersecting lines.
2. Parabola by intersecting lines and intersecting arcs.
3. Involute of a circle, cycloid, helix and sine curve.

### II. SOLID GEOMETRY

Unit 4:

Methods of orthographic projections and dimensioning strictly as per SP: 46- 2003 revised conventions. Projection of points, lines.

Unit 5:

Orthographic projections of Regular Plane figures - triangle, square, pentagon, hexagon, circle and semi-circle.

Unit 6:

Orthographic projections of right regular solids such as cubes, prisms and pyramid, (square, triangular, pentagonal and hexagonal), cones, cylinders, spheres, hemi-spheres and frustum of pyramids and cone when they are kept with their axis (a) perpendicular, to HP/VP (b) parallel to one plane and inclined to the other (c) parallel to HP and VP both.

Unit 7:

Section of solids under the same conditions mentioned above made by the horizontal, vertical and inclined planes.

### III. MACHINE DRAWING

Unit 8:

Orthographic projections of simple machine blocks.

Unit 9:

Construction of isometric scale showing main divisions of 10 mm and smaller divisions of 1 mm each. Isometric projection (drawn to isometric scale) of figures such as triangles, squares, pentagons, hexagons, circles and semi-circles with their surface parallel to HP or VP and its one side or diagonal or diameter should be either parallel or perpendicular to HP/VP.

Unit 10:

Development of the surfaces of following solids:

1. Cube, cuboid, prisms-triangular, square, pentagonal and hexagonal.
2. Pyramids (triangular, square, pentagonal and hexagonal).
3. Right circular cylinder and cone.

### IV. Practicals

1. Developing "Prisms" and "Pyramids" with the help of card board (thick paper).
2. Developing different types of packing boxes (cartons).
3. 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, CORAL DRAW, PHOTOSHOP, etc.
4. Drawing ellipse by Trammel and Thread method on the ground / drawing sheet / plywood / cardboard, etc.
5. Preparing top-view (plan) of a class room, Home: Drawing room / Bedroom / Study room / Kitchen, Engineering Graphics room drawing different objects therein.
6. Drawing through activities: Involutes, cycloid, helix and sine curves listing their uses in daily life.
7. Preparing the following sections of solids (prisms, pyramids, spheres, 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 and inclined to the base. Also creating different objects with combination of above solids.