ICSE Class 9 Syllabus 2027 Technical Drawing Applications

ICSE YEAR 2027

INDIAN CERTIFICATE OF
SECONDARY EDUCATION
EXAMINATION

TECHNICAL DRAWING
APPLICATIONS
(65)

February 2025
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TECHNICAL DRAWING APPLICATIONS (65)

Aims: in the use of traditional drafting methods which
would also be helpful in understanding computer
1. To develop competence among the students to
aided designs.
pursue technical courses like Engineering,
Architecture, Draftsmanship Surveying and other 3. To acquire the basic knowledge in their
professional courses. applications in various fields.
2. To understand basic principles of instrumental
drawing drawn to scale and to acquire basic skills

CLASS IX
There will be one written paper of three hours duration 3. Lettering and Numbering
carrying 100 marks and Internal Assessment of
Upright capitals and small, freehand, single
100 marks.
stroke, as used in Engineering drawing, and
THEORY – 100 Marks between, the correct guide lines.

1. Types of lines 4. Sheet Layout

(i) Border lines. Basic – draw border lines, title block with name,
sheet number, title etc.
(ii) Outlines.
5. Geometrical Constructions
(iii) Dashed/ Dotted lines.
(iv) Centre lines. (a) Bisector of line segment.
(v) Extension lines or Projection lines. (b) Division of a line segment into required
number of parts/ proportional parts.
(vi) Dimension lines.
(c) Perpendicular and parallel lines.
(vii) Construction lines.
(d) Bisection of an angle, trisection of a right
(viii) Cutting-Plane lines. angle/ straight angle.
(ix) Section or Hatching lines. (e) Congruent angle.
(x) Short break lines. (f) To find the centre of an arc.
(xi) Long break lines. (g) Regular polygons up to six sides with simple
The names of different lines and their uses to be methods using T-square and setsquares.
matched with the correct thickness and shade. Point, Lines and Angles: Definitions of the
2. Dimensioning various terms used in relation to, a point, different
types of lines and different types of angles to be
(i) Aligned system. used only in construction.
(ii) Unidirectional System.
• Bisecting a line.
• Drawing a perpendicular to a line from a point,
in/above / away from the end of, the line.
• Bisecting an angle when the lines meet.
• Trisecting a right angle.
• Making an angle equal to a given angle.

1

• Draw parallel line to a given line touching Quadrilaterals: Definitions of a quadrilateral /
given point away from the line by using correct different kinds of quadrilaterals, e.g. a square, a
instruments such as set squares/compasses. rectangle, a rhombus and a trapezium to be used
only in the construction of
• Draw parallel line to a given line at a given
distance. • a rectangle: when the diagonal and one side is
given or two sides are given.
• Locating a point equally distant from two
points, away from the line • a square: when one side or the diagonal is
given.
• Dividing a straight line into any required
number of given parts. • a rhombus: when one side and one angle is
given/when two diagonals are given.
• Draw two lines, from two points outside a given
straight line, to meet at a point in the line, • a trapezium: when the diagonal and the equal
making equal angles with it. sides are given/when two parallel sides and
distance between them is given.
• Constructing angles of 90, 45, 22½, 135, 67½,
60, 120, 30, 52½, 105, 75, 37½ degrees. Polygons: Definition of a polygon (regular and
irregular) and the terms relating to it only to be
Triangles: Definition of a triangle, the terms (with used in construction methods and Special
their definitions) relating to the different parts of a construction methods of regular polygons (up to
triangle, classifying the different kinds of triangles, eight sides) when the following is given:
according to their sides / angles.
• the length of a side
Construction of Triangles when the following is
• the length of sides and necessary angles are
given: given.
• the base, altitude and one side. Circles and tangents: Definition of a circle /
• all three sides. tangent, and the different parts contained in a
circle, e.g. centre, circumference, diameter, radius,
• the base angles and the altitude. arc, chord, sector and segment. Concentric circles
• the base and the base angles. only to be used in construction methods for:

• the perimeter and the proportion of the sides. • finding the center of a circle.

• the base and the ratio of the angles. • obtaining its circumference, radius given.

• the perimeter and the base angles. • obtaining the length of any given arc.

Construction of Isosceles Triangles when the • drawing an arc /a circle to pass through 2/3
following is given: given points.

• the altitude and the base. • drawing a tangent to an arc / a circle from a
point in / outside the arc / circle.
• the base and one side.
• drawing two tangents, at a given inclination to
• a base angle and an equal side. each other, to a given circle.
• the altitude and an equal side. • drawing a tangent to a circle, parallel to a
Construction of Right angled triangles when the given line.
following is given: • drawing a common exterior tangent to two
• the hypotenuse and the base. circles of equal diameter.

• the hypotenuse and an acute angle. • drawing a common exterior tangent to two
circles of unequal diameter, when the circles
• The base and height. touch / do not touch / cut one another.

2

• drawing a common interior tangent to two using the, First angle or the Third angle,
circles of equal / unequal diameter when the method of projection. Hidden end
circles touch/do not touch one another. elevation to be excluded. Layout of
drawing sheet, i.e. the Orthographic views
6. Basic facility in Orthographic Projections (First / Third angle method), inserting the
required projection lines, center lines,
(a) Projection of points.
leader lines, dimension lines,
(b) Projection of lines (in 1st quadrant/ 3rd quadrant dimensioning from the Pictorial (Isometric
/ contained by reference plane) / Oblique view) of the object.
(i) line parallel to both the reference planes. 7. Isometric drawing
(ii) line parallel to one of the reference planes Copying the given isometric figure (simple and
and perpendicular to the other plane. basic).
(iii) line inclined to one of the reference planes Their definition and their uses, the correct method
and parallel to the other plane. of drawing them, along with the correct use of the
(iv) line inclined to both the reference planes. appropriate, basic, drawing instruments.
The difference between the Isometric projection
(v) To find the true length of the line from the
given projections. and the Isometric view.

(c) Projections of Surfaces/ Areas: such as regular • drawing the Isometric view / projection, of
polygons and circular lamina (1st angle and 3rd straight lined objects, showing isometric
angle). planes.

(i) surface perpendicular to both the reference • drawing the isometric view of cylindrically
planes. shaped objects, e.g. round bars / pipes /
washers.
(ii) surface perpendicular to one of the
reference planes and parallel to the other. 8. Free hand sketching

(iii) Surface inclined to one of the surface Domestic items, appliances and tools, such as cup
planes and perpendicular to the other. with a saucer, an electric bulb, a fountain pen with
the cap removed, a tooth brush, a hammer (ball /
(iv) Conversion of simple pictorial views into claw pein), a woodsaw, a hacksaw, a screwdriver,
orthographic views (1st angle / 3rd angle a spanner, pliers, chisel, tri-square, calipers
method) ELEVATION (F.V) PLAN (internal and external) a pair of scissors, a pair of
(T.V.) END VIEW: LHS/RHS. compasses, divider, knife, water tap etc.
Its definition. The complete explanation Draw free hand sketches of these tools keeping the
with demonstration of viewing objects, proportion of various parts.
placed within the First and Third quadrant
(the planes of projections), and obtaining PART II – INTERNAL ASSESSMENT
the different views, i.e. the
Minimum fifteen drawing assignments to be done
front elevation, visible end elevations and
during the year as assigned by the teacher.
plan, and drawing them, accordingly,

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