Engineering Drawing

Course Title: Engineering Drawing

Course No: AR111

Nature of the Course: Theory + Lab

Semester: 1

Full Marks: 100

Pass Marks: 45

Credit Hours: 2

Course Description

The course intends to enable the students to be acquainted with the basic concepts and principles of drawing. Students will be familiarized with the fundamentals of drawing, instruments, symbols, conventions and current practices of different types of drawings.

Course Objectives

To develop basic concept of projection with reference to points, lines, planes and geometrical solids and enhance the skills of engineering graphic technology to the students. It also aims to develop sketching and drafting skill to facilitate communication. At the end of this course, students should be able: to acquire sufficient knowledge of drafting; to apply knowledge for studying major courses in BE.

Course Contents

1. Instrumental Drawing; Practices & Techniques

2 hrs

1.1. Equipment and Materials

Description of drawing instruments

Auxiliary equipment

Drawing materials

1.2. Techniques of Instrumental Drawing

Pencil sharpening

Securing paper

Proper use of T-squares, triangles, scales, dividers, and compasses

Erasing shields

French curves

Inking pens

2. Freehand Technical lettering

2 hrs

2.1. Lettering strokes, letter proportions, use of pencils and pens, uniformity and appearance of letters, freehand techniques, inclined and vertical letters and numerals, upper and lower cases, Standard English lettering forms

3. Dimensioning

2 hrs

3.1. Fundamentals and techniques

Size and location dimensioning

Measurement units

SI conventions

3.2. General dimensioning practices

Placement of dimensions

Aligned and unidirectional

4. Engineering Scale

2 hrs

4.1. Use of scales, reducing and enlarging drawings

4.2. Representative Factor

4.3. Construction and Types of Scales

Plain Scales

Diagonal Scales

Vernier Scales

Comparative Scales

4.4. Scale of Chords

5. Applied Geometry

6 hrs

5.1. Plane Geometrical construction

Bisecting and trisecting lines and angles

Proportional division of lines

Construction of angles, triangles, squares, and polygons

Construction using tangents and circular arcs

5.2. Methods of drawing standard curves

Ellipses

Parabolas

Hyperbolas

Involutes

Spirals

Cycloid

Helices (cylindrical and conical)

5.3. Solid Geometrical Construction

Classification and pictorial representation of solid regular objects

Prisms: square, cubical, triangular and oblique

Cylinders: right and oblique

Cones: right and oblique

Pyramid: square, triangular, oblique, truncated

Doubly-Curved and Warped Surfaces: Sphere, Torus, oblate ellipsoid, serpentine, paraboloid, hyperboloid

6. Basic Descriptive Geometry

12 hrs

6.1. Introduction: Application of descriptive geometry, principles to the solution of problems involving positioning of objects in three-dimensional space

6.2. The projection of points, lines, planes and solid in space

6.3. Projection of Solids Placed in different positions

6.4. Parallel Lines

6.5. True Length of Lines; horizontal, inclined and oblique lines

6.6. Perpendicular Lines

6.7. Bearing of a Line

6.8. Point view or End View of a Line

6.9. Shortest Distance from a point to a Line

6.10. Principal Lines of a plane

6.11. Edge View of a plane

6.12. True shape of an Oblique plane

6.13. Intersection of a Line and a plane

6.14. Angle Between a Line and a plane

6.15. Angle Between Two Intersecting Lines

6.16. Angle Between Two Non-Intersecting (Skew) lines

6.17. Angle between two planes

6.18. Shortest Distance Between Two Skew Lines

7. Theory of Projection and Multi view (Orthographic) Projection Drawing

12 hrs

7.1. Common types of projections

Pictorial (Perspective, Isometric, Oblique)

Orthographic Projection

7.2. System of orthographic projection

First angle projection

Third angle projection

7.3. Principal Views

Methods for obtaining orthographic views

Projection of lines, angles and plane surfaces

Analysis in three views

7.4. Projection of curved lines and surfaces, object orientation and selection of views for best representation; full and hidden lines

7.5. Orthographic Drawings

Making an orthographic drawing

Visualizing objects from the given views

7.6. Interpretation of adjacent areas, true-length lines, representation of holes, conventional practices

4 hrs

8.4. Revolved Section

8.5. Removed (Detail) Section

8.6. Phantom or Hidden Section

8.7. Auxiliary Sectional views

8.8. Specifying Cutting Planes for Section

8.9. Conventions for hidden lines, holes

9. Developments and Intersections

18 hrs

9.1. Introduction and Projection of Solids

9.2. Developments: General Concepts and Practical Consideration

Developments of a right or oblique prism, cylinder, pyramid and cone

Development of a truncated pyramid and cone

Triangulation method for approximately developed surfaces

Transition pieces for connecting different shapes

Development of a sphere

9.3. Intersections & Interpretation

Lines of intersection of geometric surfaces

Piercing point of a line and a geometric solid

Intersection lines of two planes

Intersection of prisms and pyramids

Intersection of a cylinder and an oblique plane

Intersection of a sphere and an oblique plane

Constructing a development using auxiliary views

Intersection of two cylinders

Intersection of a cylinder and a cone

Laboratory Works

15 laboratory sessions covering freehand technical lettering, use of drawing instruments, dimensioning and scaling, applied geometrical drawing, descriptive geometry, projection and multiview drawing, sectional views, developments of surface, and effect of intersections.

1.Freehand technical lettering and use of drawing instruments
2.Freehand technical lettering and use of drawing instruments (cont)
3.Dimensioning and Scaling
4.Applied geometrical drawing I
5.Applied geometrical drawing II
6.Descriptive geometry I
7.Descriptive geometry II
8.Descriptive geometry III
9.Projection and Multiview Drawing I
10.Projection and Multiview Drawing II
11.Sectional Views I
12.Sectional Views II
13.Developments of Surface I
14.Developments of Surface II
15.Effect of Intersections

Text Books

1.Bhatt N.D. (2011) Elementary Engineering drawing, Charotar Publishing House.
2.Dhawan, R.K. (2006). A Text book of Engineering Drawing. S. Chand and Company Limited, India.
3.French T E., Vierck C.J. and Foster R.J (1981). Engineering Drawing and Graphic Technology, McGraw Hill.
4.Luintel, M. C. Engineering Drawing (Vol I), Athrai Publication (P) Limited.
5.Luzadder W.J. (1981). Fundamentals of Engineering Drawing, Prentice Hall.

Notes:

This syllabus follows the official B.E. Computer curriculum of Far Western University. In case of any doubt or revision, the university's published syllabus shall be considered authorative.

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