Engineering
Drawing
EG
1104 AR
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Total:
4 hour /week
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Year: I
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Lecture: 1 hours/week
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Semester: I
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Tutorial:
hours/week
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Practical: 3 hours/week
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Course Description:
This course deals with
geometrical construction, orthographic projections and basic techniques of
freehand sketch.
Course Objectives:
After completing this course the students will be able to:
1. Present
different shapes accurately.
2. Apply
geometrical constructions, project point, line, plane and geometrical solids.
3. Present
three dimensional objects in orthographic from and dimension them.
4. Use
freehand techniques to sketch different shapes.
Course Contents:
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Unit 1.
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Introduction: [4]
1.1
Engineering drawing as graphic
language
1.2
Drawing instruments
1.3
Scale: Reduced scale, enlarged
scale, full size scale
1.4
Conventional line types
1.5
Sheet size and sheet layout
1.6
Exercise on drawing horizontal,
vertical and inclined lines and conventional line types [Sheet 1]
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Unit 2.
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Technical Lettering: [4]
2.1
General procedure for freehand
technical lettering: letter stroke, letter
proportion,
use of pencil and pens, uniformity of letters
2.2 Single stroke vertical capital letters,
Single stroke inclined capital letters, Single stroke vertical lowercase
letters, Single stroke inclined lowercase letters, vertical and inclined
numerals, vertical and inclined fractions
2.3
Lettering using templates
2.4 Exercise on freehand
technical lettering and lettering using templates [Sheet 2]
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Unit 3.
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Geometrical Construction: [12]
3.1
Construction on straight lines and
angles
Bisection
and trisection of a straight line, Bisection and trisection of an angle, To
draw perpendicular lines, To draw parallel lines, To divide a straight line
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into any number of equal parts, To divide a straight line
proportionately, To draw an angle equal to given angle
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3.2
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Construction of polygons
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To draw triangles, To
inscribe a circle of a triangle and circumscribe a circle about a given
circle, To draw squares, To draw a regular polygon, To draw a
regular hexagon, To draw a
regular octagon, To draw a regular polygon
(general method)
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3.3
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Exercise on construction on
straight lines and angles and construction of polygons
[Sheet 3]
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3.4
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Construction on circular arcs and
circles
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To determine center of a given arc, To draw a circle
passing through three given points, To draw an arc tangent to given two
straight lines, To draw an arc tangent to given straight line and a given
circle or circular arc, To draw an arc tangent to given two circles or
circular arcs, To draw open belt and cross belt tangents, To draw an ogee
curve between two parallel lines
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3.5
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Exercise on construction on
circular arcs and circles [Sheet 4]
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3.6
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Construction of standard curves
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Construction of parabola, ellipse, hyperbola, cycloid,
helix, spiral, involute
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3.7
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Exercise on construction of
standard curves [Sheet 5]
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Unit 4.
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Dimensioning: [4]
4.1
Dimensioning terms and notations
4.2 Techniques
of dimensioning: Size and location dimensioning 4.3 Placement of dimensions: Aligned
and Unidirectional system
4.4
Rules for dimensioning and
conventions
4.5 Exercise
on dimensioning of two dimensional figures including straight line,
angles,
circles, circular arcs [Sheet 6]
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Unit 5.
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Projection of Points, Lines and Planes: [8]
5.1
Principle of projection
5.2
Principle planes of projections,
four quadrants
5.3
Projection of point
Projection of point on two planes
of projection, Projection of point on three planes of projection 5.4 Projection of line
Projection
of line perpendicular to VP, Projection of line perpendicular to HP,
Projection of line parallel to both VP and HP, Projection of line parallel to
VP and inclined to HP, Projection of line parallel to HP and inclined to VP,
Projection
of line inclined to both VP and HP
5.5
Exercise on projection of point
and line [Sheet 7]
5.6 Projection of plane
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Projection
of plane parallel to VP, Projection of plane parallel to HP, Projection of
plane perpendicular to both VP and HP, Projection of plane perpendicular to
VP and inclined to HP, Projection of plane perpendicular to
HP
and inclined to VP
5.7
True Length of an Oblique Line
5.8
True shape of an Oblique Plane
5.9
Exercise on projection of plane;
true length of an oblique line; true shape of an oblique plane [Sheet 8]
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Unit 6.
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Projection of Geometrical Solids: [4]
6.1
Types of Solids: Polyhedra and
Solids of revolution
6.2
Projection of geometrical solids:
Prism, Cylinder, Pyramid and Cone
6.3
Projection of points on the
surfaces solids
6.4
Exercise on projection of
cylinder, prism, cone and pyramid; Projection of
points on
the surfaces of these solids [Sheet 9]
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Unit 7.
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Orthographic Projection: [20]
7.1
Principle of Orthographic
Projection
7.2
Systems of Orthographic
Projection: First Angle and Third Angle
7.3
Making an Orthographic Drawing
7.4
Analysis in Three Views
7.5
Exercise on orthographic
projection of rectangular objects with horizontal and vertical plane surfaces
[Sheet 10]
Exercise
on orthographic projection of rectangular objects with inclined plane
surfaces [Sheet 11]
Exercise
on orthographic projection of objects with cylindrical surfaces [Sheet 12
&13]
Exercise
on orthographic projection and dimensioning [Sheet 14]
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Unit 8.
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Freehand Sketching: [4]
8.1
Techniques of Sketching: Pencil
hardness, paper with grid or lines
8.2
Techniques for horizontal and
vertical lines; arcs and circles
8.3
Exercise on freehand sketches of
different shapes with lines, arcs, and circles [Sheet 15]
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Reference books:
1. Luzadder,
W.J., Fundamental of Engineering Drawing, Prentice-Hall of India Pvt-Ltd., New
Delhi, Latest edition.
2. Bhatt
N. D. and PanchalV.M., Engineering
Drawing, Charotar Publishing House, 2001.
3. Gill
P.S, Engineering Drawing, S. K. Kataraia & Sons, New Delhi, 2004/2005
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