ISC Class 11 Syllabus 2027 Geometrical and Building Drawing

ISC YEAR 2027

INDIAN SCHOOL CERTIFICATE
EXAMINATION

GEOMETRICAL AND
BUILDING DRAWING
(870)

February 2025
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GEOMETRICAL AND BUILDING DRAWING (870)

This subject may not be taken with Geometrical and Mechanical Drawing.

Candidates will be required to reach a minimum permitted). A2 size paper will be used. The
standard in the subject as a whole. The use of recommendations of IS:962-1972 Indian Standard,
drawing board, tee-square and set-squares will be Code of Practice for Architectural and Building
required. (Candidates may, if they wish, use a Drawings should be followed.
drawing board fitted with parallel motion straight
The use of models is to be encouraged in studying
edge. The use of drafting machines will be
this syllabus.

CLASS XI
There will be two papers in the subject: Projection involving use of auxiliary planes: simple
problems on auxiliary projection. Simple problems
Paper I - Theory: 3 hours…… 80 Marks
on the intersection of prisms, pyramids, cylinders,
Paper II - Project Work ……. 20 Marks right circular cones, and spheres. Determination of
true length of a line in space: sections and surface
PAPER I (THEORY): 80 Marks development of prisms, pyramids, cylinders and
right circular cone. Helix treated as a locus with
SECTION A applications on the projection of helices. Isometric
Plane Geometry and oblique projection without the use of isometric
scales.
Construction and use of scales including diagonal
scales. Enlargement and reduction of irregular plane
figures. Construction of triangles, quadrilaterals and
PAPER II (PROJECT WORK): 20 Marks
polygons. Similar plane figures. Problems on
circles, tangents and normals. Loci such as the In addition to the syllabus prescribed above,
paths of points in simple link mechanisms. Methods candidates are also required to be assessed in
of construction of ellipse, including its elementary Project Work.
properties, parabola and rectangular hyperbola: All candidates will be required to have completed
cycloidal and involute curves. two projects from any topic/s covered in theory.
SECTION B The Project work is to be assessed by the subject
teacher. For details refer to Class XII.
Solid Geometry
Orthographic projection. (Diagrams printed in the
question papers may be either First or Third Angle
projections; the projection used will be stated.
Solutions in either First or Third Angle projections
will be accepted).

ISC Examination Year 2027
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