Aims:
1. To develop competence among the students to
pursue technical courses like Engineering,
Architecture, Draftsmanship Surveying and other
professional courses.
2. To understand basic principles of instrumental
drawing drawn to scale and to acquire basic skills
in the use of traditional drafting methods which
would also be helpful in understanding computer
aided designs.
3. To acquire the basic knowledge in their
applications in various fields.
There will be one written paper of three hours duration
carrying 100 marks and Internal Assessment of
The paper will be divided into two sections,
Section I and Section II.
Section I (40 marks) shall consist of compulsory short
answer questions chosen from the entire syllabus.
Basic – draw border lines, title block with name,
sheet number, title etc.
Section II (60 marks) shall contain questions which
require longer answers. There will be a choice of
THEORY
1. Types of lines
(i) Border lines.
(ii) Outlines.
(iii) Dashed/ Dotted lines.
(iv) Centre lines.
(v) Extension lines or Projection lines.
(vi) Dimension lines.
(vii) Construction lines.
(viii) Cutting-Plane lines.
(ix) Section or Hatching lines.
(x) Short break lines.
(xi) Long break lines.
The names of different lines and their uses to be
matched with the correct thickness and shade.
2. Dimensioning
(i) Aligned system.
(ii) Unidirectional System.
THEORY- 100 Marks
1. Types of lines
(i) Border lines.
(ii) Outlines.
(iii) Dashed/ Dotted lines.
(iv) Centre lines.
(v) Extension lines or Projection lines.
(vi) Dimension lines.
(vii) Construction lines.
(viii) Cutting-Plane lines.
(ix) Section or Hatching lines.
(x) Short break lines.
(xi) Long break lines.
The names of different lines and their uses to be
matched with the correct thickness and shade.
2. Dimensioning
(i) Aligned system.
(ii) Unidirectional System.
3. Lettering and Numbering
Upright capitals and small, freehand, single
stroke, as used in Engineering drawing, and
between, the correct guide lines.
4. Sheet Layout
Basic - draw border lines, title block with name,
sheet number, title etc.
5. Geometrical Constructions
(a) Bisector of line segment.
(b) Division of a line segment into required
number of parts/proportional parts.
(c) Perpendicular and parallel lines.
(d) Bisection of an angle, trisection of a right
angle/ straight angle.
(e) Congruent angle.
(f) To find the centre of an arc.
(g) Regular polygons up to six sides with simple
methods using T-square and setsquares.
Point, Lines and Angles: Definitions of the
various terms used in relation to, a point, different
types of lines and different types of angles to be
used only in construction.
3. Lettering and Numbering
Upright capitals and small, freehand, single
stroke, as used in Engineering drawing, and
between, the correct guide lines.
4. Sheet Layout
Basic - draw border lines, title block with name,
sheet number, title etc.
5. Geometrical Constructions
(a) Bisector of line segment.
(b) Division of a line segment into required
number of parts/proportional parts.
(c) Perpendicular and parallel lines.
(d) Bisection of an angle, trisection of a right
angle/ straight angle.
(e) Congruent angle.
(f) To find the centre of an arc.
(g) Regular polygons up to six sides with simple
methods using T-square and setsquares.
Point, Lines and Angles: Definitions of the
various terms used in relation to, a point, different
types of lines and different types of angles to be
used only in construction.
Point, Lines and Angles: Definitions of the
various terms used in relation to, a point, different
types of lines and different types of angles to be
used only in construction.
• 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.
Draw parallel line to a given line touching
given point away from the line by using correct
instruments such as set squares/compasses.
Draw parallel line to a given line at a given
distance.
• Locating a point equally distant from two
points, away from the line
• Dividing a straight line into any required
number of given parts.
Draw two lines, from two points outside a given
straight line, to meet at a point in the line,
making equal angles with it.
Constructing angles of 90, 45, 222, 135, 672,
60, 120, 30, 522, 105, 75, 37½ degrees.
Triangles: Definition of a triangle, the terms (with
their definitions) relating to the different parts of a
triangle, classifying the different kinds of triangles,
according to their sides / angles.
Construction of Triangles when the following is
given:
· the base, altitude and one side.
• all three sides.
•
the base angles and the altitude.
the perimeter and the proportion of the sides.
• the base and the ratio of the angles.
• the perimeter and the base angles.
Construction of Isosceles Triangles when the
following is given:
• the altitude and the base.
the base and one side.
• a base angle and an equal side.
• the altitude and an equal side.
Construction of Right angled triangles when the
following is given:
the hypotenuse and the base.
the hypotenuse and an acute angle.
The base and height.
the perimeter and the proportion of the sides.
• the base and the ratio of the angles.
• the perimeter and the base angles.
Construction of Isosceles Triangles when the
following is given:
• the altitude and the base.
the base and one side.
• a base angle and an equal side.
• the altitude and an equal side.
Construction of Right angled triangles when the
following is given:
the hypotenuse and the base.
the hypotenuse and an acute angle.
The base and height.
Quadrilaterals: Definitions of a quadrilateral /
different kinds of quadrilaterals, e.g. a square, a
rectangle, a rhombus and a trapezium to be used
only in the construction of
a rectangle: when the diagonal and one side is
given or two sides are given.
a square: when one side or the diagonal is
given.
a rhombus: when one side and one angle is
given/when two diagonals are given.
a trapezium: when the diagonal and the equal
sides are given/when two parallel sides and
distance between them is given
Polygons: Definition of a polygon (regular and
irregular) and the terms relating to it only to be
used in construction methods and Special
construction methods of regular polygons (up to
eight sides) when the following is given:
the length of a side
the length of sides and necessary angles are
given.
Circles and tangents: Definition of a circle /
tangent, and the different parts contained in a
circle, e.g. centre, circumference, diameter, radius,
arc, chord, sector and segment. Concentric circles
only to be used in construction methods for:
finding the center of a circle.
obtaining its circumference, radius given.
obtaining the length of any given arc.
drawing an arc la circle to pass through 2/3
given points.
drawing a tangent to an arc / a circle from apoint in / outside the arc / circle.
drawing two tangents, at a given inclination to
each other, to a given circle.
drawing a tangent to a circle, parallel to a
given line.
drawing a common exterior tangent to two
circles of equal diameter.
drawing a common exterior tangent to two
circles of unequal diameter, when the circles
touch / do not touch / cut one another.
drawing a common interior tangent to two
circles of equal/ unequal diameter when the
circles touch/do not touch one another.
6. Basic facility in Orthographic Projections
(a) Projection of points.
(b) Projection of lines (in 1st quadrant/ 3rd quadrant
/ contained by reference plane)
(i) line parallel to both the reference planes.
(ii) line parallel to one of the reference planes
and perpendicular to the other plane.
(iii) line inclined to one of the reference planes
and parallel to the other plane.
(iv) line inclined to both the reference planes.
(v) To find the true length of the line from the
given projections.
(c) Projections of Surfaces/ Areas: such as regular
polygons and circular lamina (1 angle and 3rd
angle).
(i) surface perpendicular to both the reference
planes.
(ii) surface perpendicular to one of the
reference planes and parallel to the other.
(iii) Surface inclined to one of the surface
planes and perpendicular to the other.
(iv) Conversion of simple pictorial views into
orthographic views (18 angle / 3rd anglemethod) ELEVATION (F.V) PLAN
(T.V.) END VIEW: LHS/RHS.
Its definition. The complete explanation
with demonstration of viewing objects,
placed within the First and Third quadrant
(the planes of projections), and obtaining
the
different
views,
i.e.
the
front elevation, visible end elevations and
plan, and drawing them, accordingly
using the, First angle or the Third angle,
method of projection. Hidden end
elevation to be excluded. Layout of
drawing sheet, i.e. the Orthographic views
(First / Third angle method), inserting the
required projection lines, center lines,
leader
lines,
dimension
lines,
dimensioning from the Pictorial (Isometric
/ Oblique view) of the object.
Oblique view) of the object.
7. Isometric drawing
Copying the given isometric figure (simple and
basic).
Their definition and their uses, the correct method
of drawing them, along with the correct use of the
appropriate, basic, drawing instruments.
The difference between the Isometric projection
and the Isometric view.
drawing the Isometric view / projection, of
straight lined objects, showing isometric
planes.
drawing the isometric view of cylindrically
shaped objects, e.g. round bars / pipes /
washers.
8. Free hand sketching
Domestic items, appliances and tools, such as cup
with a saucer, an electric bulb, a fountain pen with
the cap removed, a tooth brush, a hammer (ball/
claw pein), a woodsaw, a hacksaw, a screwdriver,
a spanner, pliers, chisel, tri-square, calipers
(internal and external) a pair of scissors, a pair of
compasses, divider, knife, water tap etc.
Draw free hand sketches of these tools keeping the
proportion of various parts.
PART II - INTERNAL ASSESSMENT
Minimum fifteen drawing assignments to be done
during the year as assigned by the teacher.
- 8 views