CBSE Class 11 Engineering Graphics Syllabus 2021-22

ENGINEERING GRAPHICS (Code No. 046)
CLASS XI-XII (2021-22)

The subject of 'Engineering Graphics' has become an indispensable tool for Engineers,
Technocrats, Architects, Draftsmen, Surveyors, Designers and many other
professionals in the recent times. It is used to convey the ideas and information
necessary for the construction or analysis of machines, structures and system,
graphically. It is expected that the knowledge gained through the study of different
topics and the skills acquired through the prescribed practical work will make the
learners to meet the challenges of academic, professional courses and daily life
situations after studying the subject at Senior Secondary Stage.

Objectives:

The study of the subject of Engineering Graphics at Senior School Level aims at helping
the learner to:

• develop clear concept and perception of different objects.
• develop a clear understanding of plane geometry, solid geometry and machine
drawing so as to apply the same in relevant practical fields such as technology and
industry.
• develop the skill of expressing two-dimensional and three-dimensional objects into
professional language and vice versa.
• acquire speed and accuracy in use of drawing instruments.
• acquire the ability to readily draw neat sketches, often needed in "On-job
situations".
• use technology (CAD) in developing isometric and orthographic projections of
simple objects.

COURSE STRUCTURE
CLASS XI (2021-22)

One Paper (Theory) : 3 Hours 70 Marks
One paper (Practical) : 3 Hours 30 Marks

S.No. Unit Marks Periods
I PLANE GEOMETRY 16 30
1. Lines, angles and rectilinear figures
2. Circles and tangents
3. Engineering Curve: ellipse

II SOLID GEOMETRY 27 94
4. Orthographic projection of points and lines
5. Orthographic projection of regular plane figures
6. Orthographic projection of right regular solids
7. Section of solids
III MACHINE DRAWING 27 50
8. Orthographic projections of simple machine blocks
9. Isometric projection of laminae (plane figures)
Practical 30 66
Total Marks 100 240

THEORY
PLANE GEOMETRY 30 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 questionsbased
ontriangles, square, rhombus, trapeziums, regular polygons-pentagon,
hexagon and octagon. 10 Periods
Unit 2: Construction of circles, external and internal tangents of circles, inscribing
and circumscribing of circles in equilateral triangle, square, rhombus,
regular polygons-pentagon, hexagon and octagon. 10 Periods

Unit 3: Construction of Engineering curves – Ellipse
(a) Concentric circles method intersecting arcs and intersecting lines.
(b) Intersecting lines method.
(c) Intersecting arcs method. 10 Periods

II. SOLID GEOMETRY 94 Periods

Unit 4: Orthographic projection and 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 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) parallelto HP and VP both. 30 Periods

Unit 7: Section of right regular solids such as cubes, prisms and pyramids (square,
triangular, pentagonal, and hexagonal), cones, cylinders and spheres, kept
with their axis perpendicular to HP/VP, made by the
(a) Horizontal cutting plane (b) Vertical cutting plane
30 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 66 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 curves through activities:
(a) ellipse (by trammel & thread method) on the ground/ drawing sheet/
plywood/ cardboard etc.
(b) involute, cycloid, helix and sine curve.
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. Developing different types of packaging boxes (cartons).
5. 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 and inclined to the base.
6. Preparing top-view (plan) of a class room/ lab, home (Drawing room /
Bedroom / Study room / Kitchen) drawing different objects therein.

ACTIVITY

Industrial Visits (Two) to any industry/ manufacturing plant to acquaint the
students with the present - day methods & technology for better conceptual
understanding.

Note:

I. 15 activities (minimum two each from aforementioned six 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