ISC Class 12 Syllabus 2027 Geometrical and Mechanical Drawing

ISC YEAR 2027

INDIAN SCHOOL CERTIFICATE
EXAMINATION

GEOMETRICAL AND
MECHANICAL DRAWING
(869)

February 2025
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Council for the Indian School Certificate Examinations (CISCE)

MISSION STATEMENT

The Council for the Indian School Certificate
Examinations is committed to serving the nation's
children, through high quality educational
endeavours, empowering them to contribute towards
a humane, just and pluralistic society, promoting
introspective living, by creating exciting learning
opportunities, with a commitment to excellence.

ETHOS OF CISCE

Trust and fair play.
Minimum monitoring.
Allowing schools to evolve their own niche.
Catering to the needs of the children.
Giving freedom to experiment with new ideas
and practices.
Diversity and plurality - the basic strength for
evolution of ideas.
Schools to motivate pupils towards the
cultivation of:
Excellence - The Indian and Global
experience.
Values - Spiritual and cultural - to be the bedrock
of the educational experience.
Schools to have an 'Indian Ethos', strong roots in
the national psyche and be sensitive to national
aspirations.

CLASS XII
There will be two papers in the subject: PAPER II (PROJECT WORK): 20 Marks
Paper I - Theory: 3 hours…… 80 Marks In addition to the syllabus prescribed above,
Paper II - Project Work ……. 20 Marks candidates are also required to be assessed in Project
Work.
PAPER I (THEORY): 80 Marks All candidates will be required to have completed
three project sheets, selecting at least one from
Drawing (Engineering)
Section A (Orthographic Projections) and one from
Candidates will be required to answer all questions.
Section B (Assembly Drawings). Each Project sheet
The preparation of working drawings and assemblies will carry 5 Marks.
from dimensioned sketches based on the following: The Project work will be assessed by the subject
(a) fastening (nuts, bolts, studs, keys, cotters, pins, teacher and the Visiting Examiner appointed locally
locking devices); and approved by CISCE.
(b) rigid and flexible joints; Mark allocation for each Project sheet (5
marks)*:
(c) screw threads; their projection and the
proportions of standard types, profiles and Criteria Marks
proportions of spur gear teeth; conventional 1. Project size / completeness 1
methods of drawing gear wheels;
2. Line Quality 1
(d) transmission of motion and power, bearings,
supports, shafts, coupling and clutches; 3. Neatness 1
(e) pressure transmission in pipes using water, oil, 4. Accuracy 1
steam and gas, joints, unions, tees and bends, 5. Title Block 1
expansion joints, pressure packing;
TOTAL 5
(f) constructional details of prime moves and simple
machine tools;
Marks out of 20 will be distributed as given
(g) the use of reference points and planes in below:
dimensioning, machining and surface texture
symbols; 1. 3 Project sheets × 5 Marks 15 Marks

(h) toleranced dimensions involving the use of 2. Viva-Voce (Visiting Examiner) 5 Marks
IS:919 or B.S. 4500 Limits and Fits for TOTAL 20 Marks
Engineering.
Candidates will be expected to follow the
recommendations given in IS:696 - 1972 Indian
Standard, Code of Practice for General Engineering
Drawing. They should be familiar with both First
and Third Angle projections.

ISC Examination Year 2027 6

Instructions for Project Work:
• Candidates must use A2 size (Half Imperial) drawing sheets to complete all projects. A sample project
sheet layout with specifications, is given below:

• Candidates must use the given layout and specifications to complete each project sheet.
• Accuracy, neat and clean work is expected from candidates while completing the project sheets.
• Candidates need not draw / paste the questions.
• For assembly drawing, candidates need to draw:
(i) Full sectional F.V.
(ii) T.V. by using 1st OR 3rd angle method of projection (omitting all the hidden lines)

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PROJECT SHEETS
Candidates are required to have completed three project sheets, selecting at least one from
Section A (Orthographic Projections) and one from Section B (Assembly Drawings).

SECTION A - ORTHOGRAPHIC PROJECTIONS
Project Sheet 1

Draw by using 1st OR 3rd angle method of projection i) F.V, ii) T.V. & iii) L.H.S.V

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Project Sheet 2

Draw by using 1st OR 3rd angle method of projection i) F.V, ii) T.V. & iii) R.H.S.V

9

Project Sheet 3

Draw by using 1st OR 3rd angle method of projection i) F.V, ii) T.V. & iii) L.H.S.V

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Project Sheet 4

Draw by using 1st OR 3rd angle method of projection i) F.V, ii) T.V. & iii) L.H.S.V

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SECTION B - ASSEMBLY DRAWINGS
Project Sheet 1

Draw full sectional F.V & T.V of the following details of machine Parts. (omitting all hidden details)

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Project Sheet 2
Draw full sectional F.V. & T.V. of the following details of machine Parts. (omitting all hidden details)

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Project Sheet 3

Draw full sectional F.V & T.V of the following details of machine Parts. (omitting all hidden details)

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Project Sheet 4
Draw full sectional F.V & T.V of the following details of machine Parts. (omitting all hidden details)

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SAMPLE TABLE FOR PROJECT WORK
S. No. Unique Identification PROJECT SHEETS TOTAL MARKS
Number (Unique ID) of (Total 3 sheets of 5 marks each)
the candidate A B C D
Teacher Visiting Examiner Average Marks Viva-Voce by (C + D)
(A + B ÷ 2) Visiting
Examiner on
all three
project sheets
15 Marks 15 Marks 15 Marks 5 Marks 20 Marks
1

2

3

4

5

6

7

8

9

10

*For breakup of the 5 Marks (for each project sheet) to be awarded separately by the Teacher and the Visiting Examiner, please refer to the table
giving the criteria for mark allocation for each project.

NOTE: VIVA-VOCE of 5 Marks on the Project Sheets is to be conducted only by the Visiting Examiner and should be based on the Project Sheets only.

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